{"title":"Glass Audio - All Available","description":"","products":[{"product_id":"glass-audio-project-book-2002","title":"Glass Audio Projects: 17 Vacuum Tube Designs","description":"\u003cp\u003e\u003cspan\u003eCollection of never-before-published tube projects and articles containing parts lists, sources, construction details--everything you need to be able to construct these projects. An extensive resource section provides sources for the materials you need to build these and any tube audio projects.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eISBN: 978-1882580392\u003cbr\u003eSize: 8.5 x 11 inches\u003cbr\u003ePages: 60\u003c\/span\u003e\u003c\/p\u003e","brand":"KCK Media Corp.","offers":[{"title":"Default Title","offer_id":14963633684598,"sku":"AA-BKAA062","price":12.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/products\/13083435985681308960652.gif?v=1545770528"},{"product_id":"glass-audio-1990-91-back-issues","title":"Glass Audio 1990\/91 Back Issues","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e1990 and 1991 Issues of Glass Audio - in PDF format\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e4 Issues in Total - \u003cspan style=\"color: rgb(255, 42, 0);\"\u003eLink emailed immediately upon purchase\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eTable of Contents for each issue:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1990, Number 1\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBruce Rozenblit - Build 70 Watts of McIntosh Power\u003c\/li\u003e\n\u003cli\u003eRobert Laats - Amplifier Loads For Testing\u003c\/li\u003e\n\u003cli\u003eDaniel Norman - Understanding Tube Phase Inverters\u003c\/li\u003e\n\u003cli\u003eDarla Davenport - Understanding Tube Phase Inverters\u003c\/li\u003e\n\u003cli\u003eDavid Davenport - KIT REPORT: Five Mods for the Dynaco ST 70\u003c\/li\u003e\n\u003cli\u003eKen Kessler - VALVE VIEW\u003c\/li\u003e\n\u003cli\u003eTUBE DIRECTORY\u003c\/li\u003e\n\u003cli\u003eLETTERS\u003c\/li\u003e\n\u003cli\u003eCLASSIFIED\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e1990, Number 2\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBruce Rozenblit - A Transformerless Output Amplifier\u003c\/li\u003e\n\u003cli\u003eWilliam J. Petrowsky - From Oscilloscope To Curve Tracer\u003c\/li\u003e\n\u003cli\u003eAndrew Neban - On Power Supplies\u003c\/li\u003e\n\u003cli\u003eBruce Rozenblit - Test Bench Power\u003c\/li\u003e\n\u003cli\u003eKevin Carter and David Davenport - KIT REPORT Senk Frontiers' SFM-75\u003c\/li\u003e\n\u003cli\u003eVic Richardson - Unveiling The Silver Seven, Carver's Monoblock Amp\u003c\/li\u003e\n\u003cli\u003eKen Kessler - VALVE VIEWS\u003c\/li\u003e\n\u003cli\u003eTUBE DIRECTORY\u003c\/li\u003e\n\u003cli\u003eVINTAGE GLASS\u003c\/li\u003e\n\u003cli\u003eAUDIO SHARDS\u003c\/li\u003e\n\u003cli\u003eLETTERS\u003c\/li\u003e\n\u003cli\u003eCLASSIFIED\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e1991, Number 1\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVictor Staggs and Chuck Crawford - Rebuilding Tube Amplifiers\u003c\/li\u003e\n\u003cli\u003eE.A. Barbour - Four-Input Stereo Line Mixer\u003c\/li\u003e\n\u003cli\u003eJames Lin - Improving Dyna's FM-3\u003c\/li\u003e\n\u003cli\u003eAlan Douglas - Tubes in Japan\u003c\/li\u003e\n\u003cli\u003eKen Kessler - VALVE VIEWS\u003c\/li\u003e\n\u003cli\u003eTUBE DIRECTORY\u003c\/li\u003e\n\u003cli\u003eCLASSICAL GLASS\u003c\/li\u003e\n\u003cli\u003eGLASS SHARDS\u003c\/li\u003e\n\u003cli\u003eLETTERS\u003c\/li\u003e\n\u003cli\u003eAD INDEX\u003c\/li\u003e\n\u003cli\u003eGLASS CASE\u003c\/li\u003e\n\u003cli\u003eCLASSIFIED\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e1991, Number 2\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBruce Rozenblit - A Line Level Preamp\u003c\/li\u003e\n\u003cli\u003eEric Carmichel - The 6BX7 Amplifier\u003c\/li\u003e\n\u003cli\u003eHilary Parocki - Improving the Classic Tube Preamp\u003c\/li\u003e\n\u003cli\u003eEric Barbour - Testing Preamp Tubes for the Real World\u003c\/li\u003e\n\u003cli\u003eKen Kessler -VALVE VIEWS\u003c\/li\u003e\n\u003cli\u003eTUBE DIRECTORY\u003c\/li\u003e\n\u003cli\u003eLETTERS\u003c\/li\u003e\n\u003cli\u003eAD INDEX\u003c\/li\u003e\n\u003cli\u003eGLASS CASE\u003c\/li\u003e\n\u003cli\u003eTHANKS FOR THE FLOOD\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":15521483882614,"sku":"AA-GA9091PDF","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GA-90-91-TOC.jpg?v=1764710850"},{"product_id":"glass-audio-1997-back-issues-on-cd","title":"Glass Audio 1997 Back Issues on CD","description":"\u003cspan\u003eThe entire year of issues in PDF format\u003c\/span\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":15521623703670,"sku":"AA-CDGA097","price":19.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/products\/cdga97b.gif?v=1545770518"},{"product_id":"glass-audio-2000-back-issues-on-cd","title":"CD-Glass Audio 2000 Back Issues","description":"\u003cp\u003eThe entire year of issues in PDF format on CD\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSave time get instant access after purchasing, digital download - \u003ca href=\"https:\/\/cc-webshop.com\/collections\/glass-audio-magazine\/products\/glass-audio-2000-back-issues-6-pdfs\"\u003ehere\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":15521748713590,"sku":"AA-CDGA000","price":26.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/products\/cdga00b.gif?v=1545770524"},{"product_id":"glass-audio-2000-back-issues-6-pdfs","title":"Glass Audio 2000 Back Issues (6) PDFs","description":"\u003cp\u003e\u003cspan\u003eThe entire year, 6 issues in PDF format. Downloadable upon purchase.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e_______\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTABLE OF CONTENTS GLASS AUDIO 2000\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIssue 1\/2000\u003c\/strong\u003e\u003cbr\u003e“One More 91A” by Chris Wolf ....................p. 1\u003cbr\u003eGlass Case ........................p. 4\u003cbr\u003e“Amateuring: a Fresh Vision” editorial by Edward T. Dell, Jr. ..............p. 9\u003cbr\u003e“Berning ZH270 Power Amp, Part 1” by Charles Hansen ..........p. 22\u003cbr\u003e“A Universal Phase Splitter” by Ari Polisois ..................p. 32\u003cbr\u003e“Test Equipment for Amps” by Larry Lisle .................. p. 44\u003cbr\u003e“Designing Your Own Amplifier, Part 2,” Audio Classroom by Norman H. Crowhurst..p. 50\u003cbr\u003eLetters..............................p. 58\u003cbr\u003eGlassifieds ......................p. 64\u003cbr\u003eAd Index ..........................p. 64\u003cbr\u003eYard Sale ........................p. 65\u003cbr\u003eBook Report, Fundamentals of Radio-Valve Technique reviewed by Barry Fox ....p. 66\u003cbr\u003eGlass Shard by Jerry Young................ p. 70\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIssue 2\/2000\u003c\/strong\u003e\u003cbr\u003e“SV572-10 Single-Ended Triode Amp” by Marco Ferretti .............. p. 1\u003cbr\u003eGlass Case ........................p. 4\u003cbr\u003e“World Markets” editorial by Edward T. Dell, Jr. ..............p. 6\u003cbr\u003e“A Basic 50W Stereo System, Part 1” by Mike Gustafson ..........p. 24\u003cbr\u003e“Berning ZH270 Power Amp, Part 2” by Charles Hansen ..........p. 34\u003cbr\u003e“Designing Your Own Amp, Part 3,” Audio Classroom by Norman H. Crowhurst ..p. 48\u003cbr\u003e“Tubes in the Recording Studio” by Lynn Olson ..................p. 56\u003cbr\u003eLetters..............................p. 60\u003cbr\u003eGlassifieds ......................p. 64\u003cbr\u003eAd Index.......................... p. 64\u003cbr\u003eYard Sale ........................p. 65\u003cbr\u003e“Filter Enhanced Regulated Heater Supply,” Glass Shard by Michael Kornacker ......p. 68\u003cbr\u003e“Safe Transformer Sleuthing,” Glass Shard by Ted Roubal ..................p. 69\u003cbr\u003e“Cathode-Follower Circuit,” Vintage Glass by Philip Taylor ................p. 70\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIssue 3\/2000\u003c\/strong\u003e\u003cbr\u003e“100W Triode Amplifier” by Joseph Norwood Still....p. 1\u003cbr\u003eGlass Case........................ p. 4\u003cbr\u003e“Gearing Up for Reviews” editorial by Edward T. Dell, Jr. ..............p. 6\u003cbr\u003e“The Future of Vacuum Tubes in Audio, Part 1” by Lynn Olson ..................p. 20\u003cbr\u003e“Basic 50W Stereo System, Part 2” by Mike Gustafson ..........p. 26\u003cbr\u003e“A Brief Tube-Manual Survey” by Larry Lisle....................p. 32\u003cbr\u003e“Designing Your Own Amp, Part 4A,” Audio Classroom by Norman H. Crowhurst ..p. 36\u003cbr\u003e“SRPP’s Harmonic Cancellation Capabilities” by Stefano Perugini..........p. 42\u003cbr\u003eKit Review, Wolze Hardware Phono Preamp reviewed by Eric Barbour ..p. 52\u003cbr\u003eBook Review, The Joy of Audio Electronics reviewed by Bill Chater ....p. 64\u003cbr\u003eBook Review, Getting the Most Out of Vacuum Tubes reviewed by Larry Lisle....p. 65\u003cbr\u003eGlassifieds ......................p. 68\u003cbr\u003eAd Index ..........................p. 68\u003cbr\u003eYard Sale ........................p. 69\u003cbr\u003e“Rectifier Tubes as Soft-Start Controls,” Glass Shard reviewed by Michael Kornacker..p. 70\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIssue 4\/2000\u003c\/strong\u003e\u003cbr\u003e“An Affordable SE Triode Amp” by John Stewart ................p. 1\u003cbr\u003e“My Test Tracks” editorial by Edward T. Dell, Jr. ..............p. 6\u003cbr\u003e“The True Realism Preamplifier” by Robert ter Haar............p. 18\u003cbr\u003e“The Future of Vacuum Tubes in Audio, Part 2” by Lynn Olson ..................p. 26\u003cbr\u003eProduct Review, AE-3, reviewed by Charles Hansen ................p. 33\u003cbr\u003eListening Critique by Ken \u0026amp; Julie Ketler ......p. 35\u003cbr\u003eProduct Review, SET-300B reviewed by Charles Hansen....................p. 38\u003cbr\u003eListening Critique by Duncan \u0026amp; Nancy MacArthur ............p. 40\u003cbr\u003e“Basic 50W Stereo System, Part 3” by Mike Gustafson ..........p. 42\u003cbr\u003e“Designing Your Own Amp, Part 4B,” Audio Classroom by Norman H. Crowhurst....p. 52\u003cbr\u003eLetters..............................p. 58\u003cbr\u003eGlassifieds ......................p. 64\u003cbr\u003eAd Index ..........................p. 64\u003cbr\u003eYard Sale ........................p. 65\u003cbr\u003e“Short Lead Fix,” Glass Shard by Markku Vuorensivu ....p. 67\u003cbr\u003eWeb Resources ..............p. 68\u003cbr\u003e“Acrosound Model Ultralinear II,” Vintage Glass courtesy of Lance Cochrane ..............p. 70\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIssue 5\/2000\u003c\/strong\u003e\u003cbr\u003e“Paralleling Tube Effects” by Matt Kamna, Dave McDonald, \u0026amp; Ken Boehlke ..p. 1\u003cbr\u003ePublisher’s Announcement ..p. 6\u003cbr\u003e“A 20W $260 Amplifier” by Joseph Norwood Still ....p. 20\u003cbr\u003e“A Hybrid Amp Revisited” by Wim de Haan ..............p. 30\u003cbr\u003eProduct Review, AE-25 Super Amp reviewed by Charles Hansen ................p. 33\u003cbr\u003eListening Critique by Ken \u0026amp; Julie Ketler ......p. 35\u003cbr\u003eProduct Review, Kirksaeter’s SL-60 reviewed by Joseph D’Appolito............p. 36\u003cbr\u003eListening Critique by Dennis \u0026amp; Rita Colin ....p. 38\u003cbr\u003eProduct Review, Wheatfield Audio HA-2 Headphone Amp reviewed by Charles Hansen..p. 39\u003cbr\u003eListening Critique by Richard \u0026amp; Betty Jane Honeycutt ........................p. 41\u003cbr\u003e“An SE 6AS7G Design” by George J. David ..........p. 42\u003cbr\u003eProduct Review, 2A3 Sovteks reviewed by Charles Hansen ................p. 46\u003cbr\u003eLetters ............................p. 50\u003cbr\u003eGlassifieds ......................p. 64\u003cbr\u003eAd Index ..........................p. 64\u003cbr\u003eYard Sale ........................p. 65\u003cbr\u003eBook Review, Valve Amplifiers reviewed by Larry Lisle....p. 66\u003cbr\u003eWeb Resources ..............p. 68\u003cbr\u003e“A Rozenblit Preamp,” Glass Shard by Fred Slaven ................ p. 70\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIssue 6\/2000\u003c\/strong\u003e\u003cbr\u003e“SV300B SE Stereo Amp Using Plitron Toroidal Transformers” by Satoru Kobayashi......p. 1\u003cbr\u003e“The Power Line Interface” by Pete Millet....................p. 26\u003cbr\u003e“Designing Your Own Amp, Part 5,” Audio Classroom by Norman H. Crowhurst ..p. 30\u003cbr\u003eKit Review, The Assemblage DAC-2.6 and DAC-3.0 reviewed by Gary A. Galo ..p. 40\u003cbr\u003e“The Tradition: A Triode Odyssey” by István Béri ..................p. 48\u003cbr\u003eLetters..............................p. 58\u003cbr\u003e“Miniature Transformers As Chokes,” Glass Shard by Neal Haight..................p. 63\u003cbr\u003eGlassifieds ......................p. 64\u003cbr\u003eAd Index ..........................p. 64\u003cbr\u003eYard Sale ........................p. 65\u003cbr\u003eBook Review, Practical Amplifier Diagrams reviewed by Larry Lisle....p. 66\u003cbr\u003eWebsite Resources ........p. 68\u003cbr\u003eTest Tracks by Jim Brauninger............p. 70\u003c\/p\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":46449631035606,"sku":"AA-PDFGA2000","price":24.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GlassAudio-2000-Covers.jpg?v=1736711189"},{"product_id":"glass-audio-2000-issue-1-of-6-pdf","title":"Glass Audio 2000 - Issue 1 (of 6)  PDF","description":"\u003cp\u003e\u003cstrong\u003eIssue 1 of Glass Audio 2000 - Downloadable upon purchase.\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eThe full set of Glass Audio 2000 can be \u003ca rel=\"noopener\" href=\"https:\/\/cc-webshop.com\/collections\/glass-audio-magazine\/products\/glass-audio-2000-back-issues-6-pdfs\" target=\"_blank\"\u003efound here\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e_______\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTABLE OF CONTENTS GLASS AUDIO 2000\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIssue 1\/2000\u003c\/strong\u003e\u003cbr\u003e“One More 91A” by Chris Wolf ....................p. 1\u003cbr\u003eGlass Case ........................p. 4\u003cbr\u003e“Amateuring: a Fresh Vision” editorial by Edward T. Dell, Jr. ..............p. 9\u003cbr\u003e“Berning ZH270 Power Amp, Part 1” by Charles Hansen ..........p. 22\u003cbr\u003e“A Universal Phase Splitter” by Ari Polisois ..................p. 32\u003cbr\u003e“Test Equipment for Amps” by Larry Lisle .................. p. 44\u003cbr\u003e“Designing Your Own Amplifier, Part 2,” Audio Classroom by Norman H. Crowhurst..p. 50\u003cbr\u003eLetters..............................p. 58\u003cbr\u003eGlassifieds ......................p. 64\u003cbr\u003eAd Index ..........................p. 64\u003cbr\u003eYard Sale ........................p. 65\u003cbr\u003eBook Report, Fundamentals of Radio-Valve Technique reviewed by Barry Fox ....p. 66\u003cbr\u003eGlass Shard by Jerry Young................ p. 70\u003c\/p\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":46453542584534,"sku":"AA-PDFGA1\/2000","price":4.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GA1-2000-Cover.jpg?v=1736710600"},{"product_id":"glass-audio-2000-issue-2-of-6-pdf","title":"Glass Audio 2000 - Issue 2 (of 6)  PDF","description":"\u003cp\u003e\u003cstrong\u003eIssue 2 of Glass Audio 2000 - Downloadable upon purchase.\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eThe full set of Class Audio 2000 can be \u003ca href=\"https:\/\/cc-webshop.com\/collections\/glass-audio-magazine\/products\/glass-audio-2000-back-issues-6-pdfs\" rel=\"noopener\" target=\"_blank\"\u003efound here\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e_______\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTABLE OF CONTENTS GLASS AUDIO 2000\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIssue 2\/2000\u003c\/strong\u003e\u003cbr\u003e“SV572-10 Single-Ended Triode Amp” by Marco Ferretti .............. p. 1\u003cbr\u003eGlass Case ........................p. 4\u003cbr\u003e“World Markets” editorial by Edward T. Dell, Jr. ..............p. 6\u003cbr\u003e“A Basic 50W Stereo System, Part 1” by Mike Gustafson ..........p. 24\u003cbr\u003e“Berning ZH270 Power Amp, Part 2” by Charles Hansen ..........p. 34\u003cbr\u003e“Designing Your Own Amp, Part 3,” Audio Classroom by Norman H. Crowhurst ..p. 48\u003cbr\u003e“Tubes in the Recording Studio” by Lynn Olson ..................p. 56\u003cbr\u003eLetters..............................p. 60\u003cbr\u003eGlassifieds ......................p. 64\u003cbr\u003eAd Index.......................... p. 64\u003cbr\u003eYard Sale ........................p. 65\u003cbr\u003e“Filter Enhanced Regulated Heater Supply,” Glass Shard by Michael Kornacker ......p. 68\u003cbr\u003e“Safe Transformer Sleuthing,” Glass Shard by Ted Roubal ..................p. 69\u003cbr\u003e“Cathode-Follower Circuit,” Vintage Glass by Philip Taylor ................p. 70\u003c\/p\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":46453546090710,"sku":"AA-PDFGA2\/2000","price":4.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GA2-2000-Cover.jpg?v=1736710600"},{"product_id":"glass-audio-2000-issue-3-of-6-pdf","title":"Glass Audio 2000 - Issue 3 (of 6)  PDF","description":"\u003cp\u003e\u003cstrong\u003eIssue 3 of Glass Audio 2000 - Downloadable upon purchase.\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eThe full set of Glass Audio 2000 can be \u003ca rel=\"noopener\" href=\"https:\/\/cc-webshop.com\/collections\/glass-audio-magazine\/products\/glass-audio-2000-back-issues-6-pdfs\" target=\"_blank\"\u003efound here\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e_______\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTABLE OF CONTENTS GLASS AUDIO 2000\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIssue 3\/2000\u003c\/strong\u003e\u003cbr\u003e“100W Triode Amplifier” by Joseph Norwood Still....p. 1\u003cbr\u003eGlass Case........................ p. 4\u003cbr\u003e“Gearing Up for Reviews” editorial by Edward T. Dell, Jr. ..............p. 6\u003cbr\u003e“The Future of Vacuum Tubes in Audio, Part 1” by Lynn Olson ..................p. 20\u003cbr\u003e“Basic 50W Stereo System, Part 2” by Mike Gustafson ..........p. 26\u003cbr\u003e“A Brief Tube-Manual Survey” by Larry Lisle....................p. 32\u003cbr\u003e“Designing Your Own Amp, Part 4A,” Audio Classroom by Norman H. Crowhurst ..p. 36\u003cbr\u003e“SRPP’s Harmonic Cancellation Capabilities” by Stefano Perugini..........p. 42\u003cbr\u003eKit Review, Wolze Hardware Phono Preamp reviewed by Eric Barbour ..p. 52\u003cbr\u003eBook Review, The Joy of Audio Electronics reviewed by Bill Chater ....p. 64\u003cbr\u003eBook Review, Getting the Most Out of Vacuum Tubes reviewed by Larry Lisle....p. 65\u003cbr\u003eGlassifieds ......................p. 68\u003cbr\u003eAd Index ..........................p. 68\u003cbr\u003eYard Sale ........................p. 69\u003cbr\u003e“Rectifier Tubes as Soft-Start Controls,” Glass Shard reviewed by Michael Kornacker..p. 70\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":46453549367510,"sku":"AA-PDFGA3\/2000","price":4.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GA3-2000-Cover.jpg?v=1736710869"},{"product_id":"glass-audio-2000-issue-4-of-6-pdf","title":"Glass Audio 2000 - Issue 4 (of 6)  PDF","description":"\u003cp\u003e\u003cstrong\u003eIssue 4 of Glass Audio 2000 - Downloadable upon purchase.\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eThe full set of Glass Audio 2000 can be \u003ca href=\"https:\/\/cc-webshop.com\/collections\/glass-audio-magazine\/products\/glass-audio-2000-back-issues-6-pdfs\" rel=\"noopener\" target=\"_blank\"\u003efound here\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e_______\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTABLE OF CONTENTS GLASS AUDIO 2000\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIssue 4\/2000\u003c\/strong\u003e\u003cbr\u003e“An Affordable SE Triode Amp” by John Stewart ................p. 1\u003cbr\u003e“My Test Tracks” editorial by Edward T. Dell, Jr. ..............p. 6\u003cbr\u003e“The True Realism Preamplifier” by Robert ter Haar............p. 18\u003cbr\u003e“The Future of Vacuum Tubes in Audio, Part 2” by Lynn Olson ..................p. 26\u003cbr\u003eProduct Review, AE-3, reviewed by Charles Hansen ................p. 33\u003cbr\u003eListening Critique by Ken \u0026amp; Julie Ketler ......p. 35\u003cbr\u003eProduct Review, SET-300B reviewed by Charles Hansen....................p. 38\u003cbr\u003eListening Critique by Duncan \u0026amp; Nancy MacArthur ............p. 40\u003cbr\u003e“Basic 50W Stereo System, Part 3” by Mike Gustafson ..........p. 42\u003cbr\u003e“Designing Your Own Amp, Part 4B,” Audio Classroom by Norman H. Crowhurst....p. 52\u003cbr\u003eLetters..............................p. 58\u003cbr\u003eGlassifieds ......................p. 64\u003cbr\u003eAd Index ..........................p. 64\u003cbr\u003eYard Sale ........................p. 65\u003cbr\u003e“Short Lead Fix,” Glass Shard by Markku Vuorensivu ....p. 67\u003cbr\u003eWeb Resources ..............p. 68\u003cbr\u003e“Acrosound Model Ultralinear II,” Vintage Glass courtesy of Lance Cochrane ..............p. 70\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":46453549465814,"sku":"AA-PDFGA4\/2000","price":4.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GA4-2000-Cover.jpg?v=1736711033"},{"product_id":"glass-audio-2000-issue-5-of-6-pdf","title":"Glass Audio 2000 - Issue 5 (of 6)  PDF","description":"\u003cp\u003e\u003cstrong\u003eIssue 5 of Glass Audio 2000 - Downloadable upon purchase.\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eThe full set of Glass Audio 2000 can be \u003ca href=\"https:\/\/cc-webshop.com\/collections\/glass-audio-magazine\/products\/glass-audio-2000-back-issues-6-pdfs\" rel=\"noopener\" target=\"_blank\"\u003efound here\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e_______\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTABLE OF CONTENTS GLASS AUDIO 2000\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIssue 5\/2000\u003c\/strong\u003e\u003cbr\u003e“Paralleling Tube Effects” by Matt Kamna, Dave McDonald, \u0026amp; Ken Boehlke ..p. 1\u003cbr\u003ePublisher’s Announcement ..p. 6\u003cbr\u003e“A 20W $260 Amplifier” by Joseph Norwood Still ....p. 20\u003cbr\u003e“A Hybrid Amp Revisited” by Wim de Haan ..............p. 30\u003cbr\u003eProduct Review, AE-25 Super Amp reviewed by Charles Hansen ................p. 33\u003cbr\u003eListening Critique by Ken \u0026amp; Julie Ketler ......p. 35\u003cbr\u003eProduct Review, Kirksaeter’s SL-60 reviewed by Joseph D’Appolito............p. 36\u003cbr\u003eListening Critique by Dennis \u0026amp; Rita Colin ....p. 38\u003cbr\u003eProduct Review, Wheatfield Audio HA-2 Headphone Amp reviewed by Charles Hansen..p. 39\u003cbr\u003eListening Critique by Richard \u0026amp; Betty Jane Honeycutt ........................p. 41\u003cbr\u003e“An SE 6AS7G Design” by George J. David ..........p. 42\u003cbr\u003eProduct Review, 2A3 Sovteks reviewed by Charles Hansen ................p. 46\u003cbr\u003eLetters ............................p. 50\u003cbr\u003eGlassifieds ......................p. 64\u003cbr\u003eAd Index ..........................p. 64\u003cbr\u003eYard Sale ........................p. 65\u003cbr\u003eBook Review, Valve Amplifiers reviewed by Larry Lisle....p. 66\u003cbr\u003eWeb Resources ..............p. 68\u003cbr\u003e“A Rozenblit Preamp,” Glass Shard by Fred Slaven ................ p. 70\u003c\/p\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":46453549793494,"sku":"AA-PDFGA5\/2000","price":4.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GA5-2000-Cover.jpg?v=1736711099"},{"product_id":"glass-audio-2000-issue-6-of-6-pdf","title":"Glass Audio 2000 - Issue 6 (of 6)  PDF","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eIssue 6 of Glass Audio 2000 - Downloadable upon purchase.\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eThe full set of Glass Audio 2000 can be \u003ca href=\"https:\/\/cc-webshop.com\/collections\/glass-audio-magazine\/products\/glass-audio-2000-back-issues-6-pdfs\" rel=\"noopener\" target=\"_blank\"\u003efound here\u003c\/a\u003e.\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cspan\u003e_______\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cstrong\u003eTABLE OF CONTENTS GLASS AUDIO 2000\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIssue 6\/2000\u003c\/strong\u003e\u003cbr\u003e“SV300B SE Stereo Amp Using Plitron Toroidal Transformers” by Satoru Kobayashi......p. 1\u003cbr\u003e“The Power Line Interface” by Pete Millet....................p. 26\u003cbr\u003e“Designing Your Own Amp, Part 5,” Audio Classroom by Norman H. Crowhurst ..p. 30\u003cbr\u003eKit Review, The Assemblage DAC-2.6 and DAC-3.0 reviewed by Gary A. Galo ..p. 40\u003cbr\u003e“The Tradition: A Triode Odyssey” by István Béri ..................p. 48\u003cbr\u003eLetters..............................p. 58\u003cbr\u003e“Miniature Transformers As Chokes,” Glass Shard by Neal Haight..................p. 63\u003cbr\u003eGlassifieds ......................p. 64\u003cbr\u003eAd Index ..........................p. 64\u003cbr\u003eYard Sale ........................p. 65\u003cbr\u003eBook Review, Practical Amplifier Diagrams reviewed by Larry Lisle....p. 66\u003cbr\u003eWebsite Resources ........p. 68\u003cbr\u003eTest Tracks by Jim Brauninger............p. 70\u003c\/p\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":46453550088406,"sku":"AA-PDFGA6\/2000","price":4.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GA6-2000-Cover.jpg?v=1736711189"},{"product_id":"glass-audio-back-issues-1989-94-96","title":"Glass Audio Back Issues  1989\/94\/96","description":"\u003cdiv class=\"product-primary\"\u003e\n\u003cdiv class=\"product-description\"\u003e\n\u003cp\u003eGlass Audio Digital Archive - Years 1989, 1994 and 1996 (12 Issues in total)\u003c\/p\u003e\n\u003cp\u003eIssues may be downloaded as PDF files or viewed in the online flipbook.\u003cbr\u003eAvailable in 24-48 hrs after purchase. \u003cbr\u003e\u003cbr\u003eThe PDF files were created from black-and-white scans of the physical issues.\u003c\/p\u003e\n1989 - Two Issues, \u003cbr\u003e1994 - Four Issues\u003c\/div\u003e\n\u003cdiv class=\"product-description\"\u003e1996 - Six Issues\u003cbr\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-secondary\"\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\n\u003cbr\u003e\u003cstrong\u003e1989 - Issue 1\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e“ST-70 With Solid-State Regulation” by Joe Curcio, page 1\u003cbr\u003e“UK Round-UP” by Ken Kessler, page 3\u003cbr\u003e“A Vacuum Tube Denon CD” by Richard Painter, page 15\u003cbr\u003e“Restore Your Scott Tuner” by Victor Staggs, page 20\u003cbr\u003eAsk GA, by Norman Crowhurst, page 24\u003cbr\u003eWorld Directory of Tube Electronics Manufacturers, page 27\u003cbr\u003eLetters, page 29\u003cbr\u003eClassifi ed, page 31\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003cstrong\u003e1989 - Issue 2\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e“Soft Start for Tubes” by Roy Mottram, page 1\u003cbr\u003eValve Views by Ken Kessler, page 3\u003cbr\u003e“Rejuvenating Dyna’s Mark IV” by Paul Becker, page 8\u003cbr\u003e“Extending Tube Life” by Charles King, page 16\u003cbr\u003eWorld Tube Directory, page 20\u003cbr\u003e“Transformer Hunting” by Norman Crowhurst, page 24\u003cbr\u003eKit Report, ST-70 Mods, by Roy Mottram, page 26\u003cbr\u003eLetters, page 34\u003cbr\u003eGlass Case, page 44\u003cbr\u003eClassifi ed, page 45\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003cstrong\u003e1994 - Issue 1\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e“Transformer Coupled WE-300B Single-Ended Amp” by Nobu Shishido, page 1\u003cbr\u003eValve Views, by Ken Kessler, page 3\u003cbr\u003eEditorial, “How We Began” by Edward T. Dell, Jr., page 4\u003cbr\u003e“A Tube DAC” by Norman Tracy, page 14\u003cbr\u003e“A Dual 1 + 1 Cascade Amplifier” by Eric Barbour, page 32\u003cbr\u003eAsk GA, \u003cbr\u003eby Eric Barbour, page 34\u003cbr\u003eKit Report, e\/j BLOOM’s IMagine™ Kit, reviewed by Fernando Garcia, page 36\u003cbr\u003eGlass Shards, page 42\u003cbr\u003eLetters, page 46\u003cbr\u003eClassifi eds, page 50\u003cbr\u003eAd Index, page 54\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003cstrong\u003e1994 - Issue 2\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e“Cascode Construction” by Denzil Danner, page 1\u003cbr\u003eValve Views, by Ken Kessler, page 3\u003cbr\u003eEditorial, “Looking Backward \u0026amp; Forward” by Edward T. Dell, Jr., page 4\u003cbr\u003e“A New Dynaco PAS Upgrade” by Norman L. Koren, page 10\u003cbr\u003e“Amending Brian Lowe’s Servo \u003cbr\u003eBias System” by Andrew Nehan, page 22\u003cbr\u003e“Output Transformers, Pt 1” by James Moir, page 24\u003cbr\u003eAsk GA, \u003cbr\u003eby Eric Barbour, page 32\u003cbr\u003eGlass Shards, page 38\u003cbr\u003eLetters, page 40\u003cbr\u003eClassifi eds, page 49\u003cbr\u003eAd Index, page 53\u003cbr\u003eGlass Case, page 54\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003cstrong\u003e1994 - Issue 3\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e“A Purist Tube-Regulated Supply, Pt 1” by Douglas Cann, page 1\u003cbr\u003eGlass Case, page 3\u003cbr\u003e“An Amplifi er Soft-Starting Control” by Anthony Nash, page 14\u003cbr\u003e“Differential Series Feedback Pair” by Denzil Danner, page 18\u003cbr\u003e“Output Transformers, Pt 2” by James Moir, page 30\u003cbr\u003eAsk GA, by Bruce Rozenblit, page 38\u003cbr\u003eBook Report, Vintage Hi-Fi Spotter’s Guide, Volumes 1 \u0026amp; 2, reviewed by Eric Barbour, page 40\u003cbr\u003eLetters, page 43\u003cbr\u003eClassifi eds, page 51\u003cbr\u003eAd Index, page 54\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003cstrong\u003e1994 - Issue 4\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e“Inside the Russian Tube Industry” by Eric Barbour, page 1\u003cbr\u003eValve Views, by Ken Kessler, page 3\u003cbr\u003e“A Headphone Helper” by Denzil Danner, page 12\u003cbr\u003e“Balance in Push-Pull Amplifiers” by Joseph Marshall, page 16\u003cbr\u003e“Rectifying Your Drivers” by Paul Becker, page 20\u003cbr\u003e“A Purist Tube-Regulated Supply, Pt 2” by Douglas Cann, page 22\u003cbr\u003eAsk GA, by Eric Barbour, page 28\u003cbr\u003eKit Report, Maplin Millennium 4-20 20W Valve Power Amplifier, reviewed by Kevin Carter \u0026amp; David Davenport, page 34\u003cbr\u003eGlass Shards, page 38\u003cbr\u003eVintage Glass, Heathkit Mono Preamplifier WA-P2, page 44\u003cbr\u003eLetters, page 45\u003cbr\u003eBook Report, Audio Anthology, Volume 5, reviewed by Gary A. Galo\u003cbr\u003eClassifi ed, page 58\u003cbr\u003eGlass Case, page 62\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003cstrong\u003e1996- Issue 1\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e“The Country Boy’s Capacitor Microphone” by David Royer, page 1\u003cbr\u003eGlass Case, page 4\u003cbr\u003e“Driving the 300B” by Reid Welch, page 16\u003cbr\u003e“Distortion in Tubes, Pt 2” by Rickard Berglund, page 22\u003cbr\u003e“ The Amplifi er Distortion Story, Pt 2” by Norman H. Crowhurst, page 26\u003cbr\u003e“Collecting Glass—an Overview” by Charles Ochs, page 34\u003cbr\u003eProduct Review, The BK Power Amps, reviewed by George Brooke, page 40 \u003cbr\u003eGlass Shard, “A Mu-Follower Driver for the 300B” by Rickard Berglund, page 47\u003cbr\u003eBook Reports, Digital Projects for Musicians, The Loudspeaker Design Cookbook, 5th edition, page 48\u003cbr\u003eV \u0026amp; T News, page 51\u003cbr\u003eLetters, page 52\u003cbr\u003eClassifi eds, page 60\u003cbr\u003eAd Index, page 61\u003cbr\u003eClubs, page 62\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003cstrong\u003e1996 - Issue 2\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e“A Single-Ended Pentode Amp” by Rickard Berglund, page 1\u003cbr\u003eGlass Case, page 6\u003cbr\u003e“In Search of the Perfect Tube” by David O’Rourke, page 12\u003cbr\u003e“We Talk with Dennis Had” by Richard Painter, page 34\u003cbr\u003e“A Differential Amp for Electret and Electrostatic Headphones” by Scott K. Reynolds, page 38\u003cbr\u003eAsk GA, page 44\u003cbr\u003eGlass Shards, “Power-Supply Project” by Paul Spiegel, page 50\u003cbr\u003eV \u0026amp; T News, page 54\u003cbr\u003e“Tube Families” by Charles Ochs, page 56\u003cbr\u003eLetters, page 58\u003cbr\u003eVintage Glass, Harman-Kardon \u003cbr\u003eCitation II schematic, page 66\u003cbr\u003eClassifi eds, page 67\u003cbr\u003eAd Index, page 68\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003cstrong\u003e1996 - Issue 3\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e“Triode vs. Pentode: Which?” by Norman Crowhurst, page 1\u003cbr\u003eGlass Case, page 4\u003cbr\u003e“The Stereo Half-Watter” by Tom S. Jones, page 22\u003cbr\u003e“A Single-Ended SV811-10 Amp” by Eric Barbour, page 34\u003cbr\u003e“Dual Single-Ended Amplifier” by Graeme J. Cohen, page 42\u003cbr\u003e“EZ Start Power Controller” by Gary McClellan, page 54\u003cbr\u003eAsk GA, page 62\u003cbr\u003eGlass Shards, “Simple Class A Headphone Amp” by Adam Stouffer, page 64\u003cbr\u003eKit Report, Velleman 100W per Channel Stereo Valve Amp, reviewed by Charles Ochs, page 65\u003cbr\u003eLetters, page 69\u003cbr\u003eClassifi eds, page 75\u003cbr\u003eAd Index, page 76\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003cstrong\u003e1996 - Issue 4\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e“Harmonic Cancellation Improves the SE Amplifi er” by Reid Welch, page 1\u003cbr\u003eGlass Case, page 4\u003cbr\u003e“A Tube Designator Glossary, Pt 1” by Matthew J. Cottrell, page 14\u003cbr\u003e“Yes, You Can Substitute for the 7591 Tube!” by Gary McClellan, page 22\u003cbr\u003e“Quality Testing for Audio Amplifiers” by Norman Crowhurst, page 30\u003cbr\u003e“Vacuum Tube Electronics: Part 1—The Classic Texts” by Scott Frankland, page 36\u003cbr\u003e“A Russian\/Western Tube Chart” by Andreas Schubert, page 44\u003cbr\u003e“Measuring Circuit Impedances” by Chris Paul, page 46\u003cbr\u003eKit Report, The Arion Adonis Amp Kit, reviewed by Paul Becker, page 56\u003cbr\u003eGlass Shards, “Modify Your 6BQ5 Power Amp, A Positive Feedback 100MA Regulator” by Rickard Berglund, page 64\u003cbr\u003eLetters, page 66\u003cbr\u003eAsk GA, page 72\u003cbr\u003eClassifi eds, page 75\u003cbr\u003eAd Index, page 76\u003cbr\u003eVintage Glass, Fisher Model 50-C Master Audio Control, page 78\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003cstrong\u003e1996 - Issue 5\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e“A 15W SE Power Amp with 6C33C-B” by Erno Borbely, page 1\u003cbr\u003eGlass Case, page 5\u003cbr\u003e“Improved Vacuum-Tube Models for SPICE Simulations” by Norman Koren, page 18\u003cbr\u003e“Direct-Coupled Mu Stage” by Alan Kimmel, page 30\u003cbr\u003e“World Class Fit and Finish” by Chris Wolf, page 36\u003cbr\u003e“Filament Power and Performance of the 2A3” by Donald S. Jenkins, page 42\u003cbr\u003e“Enhanced-Mode Operation” by Rickard Berglund, page 50\u003cbr\u003eAsk GA, page 54\u003cbr\u003eLetters, page 58\u003cbr\u003eClassifi eds, page 67\u003cbr\u003eAd Index, page 68\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e\u003cstrong\u003e1996 - Issue 6\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e“KISMET: A Simple 2A3 SE Amp” by Fabio Camorani, page 1\u003cbr\u003eGlass Case, page 4\u003cbr\u003e“A Tube Designator Glossary, Pt 2” by Matthew J. Cottrell, page 16\u003cbr\u003e“A Triode Minimalist Crossover” by Richard Painter, page 22\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e“Vacuum Tube Electronics: Part 2—Specialized Titles” by Scott Franklin, page 26\u003c\/div\u003e\n\u003cdiv class=\"product-options clearfix\"\u003e“Ultra-Low Distortion Graphic Equalizer” by Rickard Berglund, page 40\u003cbr\u003e“The Search for Linearity—Pt 1” by Mark Kelly, page 42\u003cbr\u003e“A New Transmitting Tube Driver Stage” by Rickard Berglund, page 50\u003cbr\u003eBook Report, Audio Anthology, Volume Six, reviewed by Gary Galo, page 52\u003cbr\u003eAsk GA, page 56\u003cbr\u003eGlass Shards, “Triode-Loaded Pentode Input for SE Amps” by Rickard Berglund, page 60\u003cbr\u003eLetters, page 62\u003cbr\u003eAd Index, page 72\u003cbr\u003eShowcase, page 73\u003cbr\u003eClassifi eds, page 76\u003c\/div\u003e\n\u003c\/div\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":46554302382294,"sku":"AA-CDGA946-D","price":29.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/products\/cdga946b.gif?v=1545770527"},{"product_id":"glass-audio-1990-back-issue-1","title":"Glass Audio 1990 Issue 1 (of 2)","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e1990 Issue 1 (of 2) of Glass Audio - in PDF format\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eLink emailed immediately upon purchase\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eTable of Contents:\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1990, Number 1\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBruce Rozenblit - Build 70 Watts of McIntosh Power\u003c\/li\u003e\n\u003cli\u003eRobert Laats - Amplifier Loads For Testing\u003c\/li\u003e\n\u003cli\u003eDaniel Norman - Understanding Tube Phase Inverters\u003c\/li\u003e\n\u003cli\u003eDarla Davenport - Understanding Tube Phase Inverters\u003c\/li\u003e\n\u003cli\u003eDavid Davenport - KIT REPORT: Five Mods for the Dynaco ST 70\u003c\/li\u003e\n\u003cli\u003eKen Kessler - VALVE VIEW\u003c\/li\u003e\n\u003cli\u003eTUBE DIRECTORY\u003c\/li\u003e\n\u003cli\u003eLETTERS\u003c\/li\u003e\n\u003cli\u003eCLASSIFIED\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":47552004456662,"sku":"AA-GA90-1PDF","price":4.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GA-90-91-TOC.jpg?v=1764710850"},{"product_id":"glass-audio-1990-back-issue-2","title":"Glass Audio 1990 Issue 2 (of 2)","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e1990 Issue 2 (of 2) of Glass Audio - in PDF format\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eLink emailed immediately upon purchase\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eTable of Contents:\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1990, Number 2\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBruce Rozenblit - A Transformerless Output Amplifier\u003c\/li\u003e\n\u003cli\u003eWilliam J. Petrowsky - From Oscilloscope To Curve Tracer\u003c\/li\u003e\n\u003cli\u003eAndrew Neban - On Power Supplies\u003c\/li\u003e\n\u003cli\u003eBruce Rozenblit - Test Bench Power\u003c\/li\u003e\n\u003cli\u003eKevin Carter and David Davenport - KIT REPORT Senk Frontiers' SFM-75\u003c\/li\u003e\n\u003cli\u003eVic Richardson - Unveiling The Silver Seven, Carver's Monoblock Amp\u003c\/li\u003e\n\u003cli\u003eKen Kessler - VALVE VIEWS\u003c\/li\u003e\n\u003cli\u003eTUBE DIRECTORY\u003c\/li\u003e\n\u003cli\u003eVINTAGE GLASS\u003c\/li\u003e\n\u003cli\u003eAUDIO SHARDS\u003c\/li\u003e\n\u003cli\u003eLETTERS\u003c\/li\u003e\n\u003cli\u003eCLASSIFIED\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":47552004849878,"sku":"AA-GA90-2PDF","price":4.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GA-90-91-TOC.jpg?v=1764710850"},{"product_id":"glass-audio-1991-back-issue-1","title":"Glass Audio 1991 Issue 1 (of 2)","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e1991 Issue 1 (of 2) of Glass Audio - in PDF format\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eLink emailed immediately upon purchase\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eTable of Contents:\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e1991, Number 1\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVictor Staggs and Chuck Crawford - Rebuilding Tube Amplifiers\u003c\/li\u003e\n\u003cli\u003eE.A. Barbour - Four-Input Stereo Line Mixer\u003c\/li\u003e\n\u003cli\u003eJames Lin - Improving Dyna's FM-3\u003c\/li\u003e\n\u003cli\u003eAlan Douglas - Tubes in Japan\u003c\/li\u003e\n\u003cli\u003eKen Kessler - VALVE VIEWS\u003c\/li\u003e\n\u003cli\u003eTUBE DIRECTORY\u003c\/li\u003e\n\u003cli\u003eCLASSICAL GLASS\u003c\/li\u003e\n\u003cli\u003eGLASS SHARDS\u003c\/li\u003e\n\u003cli\u003eLETTERS\u003c\/li\u003e\n\u003cli\u003eAD INDEX\u003c\/li\u003e\n\u003cli\u003eGLASS CASE\u003c\/li\u003e\n\u003cli\u003eCLASSIFIED\u003cspan\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":47552005243094,"sku":"AA-GA91-1PDF","price":4.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GA-90-91-TOC.jpg?v=1764710850"},{"product_id":"glass-audio-1991-back-issue-2","title":"Glass Audio 1996 Issue 1 (of 6)","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e1996 Issue 1 (of 6) of Glass Audio - in PDF format\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eLink emailed immediately upon purchase\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eStep into the world of professional-grade audio engineering and vintage restoration with \u003cstrong\u003eVolume 8, Number 1 of \u003cem\u003eGlass Audio\u003c\/em\u003e (1996)\u003c\/strong\u003e. This issue features innovative DIY projects, deep technical analysis, and essential guides for the tube enthusiast:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Country Boy's Capacitor Microphone\u003c\/strong\u003e – Stop paying thousands of dollars for studio microphones. Veteran designer David Royer shows you how to build a high-quality capacitor microphone for about $100. Using the Primo CM 23B capsule, this project delivers results that rival \"uptown\" professional gear, making it perfect for both recording and speaker\/room evaluation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDriving the 300B\u003c\/strong\u003e – Tired of \"slogging, closed-in\" sound from your 300B-based amplifier? Concert piano technician Reid Welch shares his journey in tuning the ultimate driver setup. By moving from traditional RC coupling to interstage transformers, he reveals how to achieve a riveting, textured sound that finally lets your triodes sing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDistortion in Tubes, Part 2\u003c\/strong\u003e – Master the technical nuances of small-signal triodes with Rickard Berglund’s continued measurement study. This installment focuses on cascode circuits, providing critical data on gain, output impedance, and distortion for common tubes like the ECC88 and 12AT7 to help you select the perfect tube for your specific design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Amplifier Distortion Story, Part 2\u003c\/strong\u003e – Dive deep into the physics of audio with the second part of Norman Crowhurst’s landmark series. Learn how to identify and measure elusive low-frequency transient distortions and discover the design strategies needed to prevent feedback-induced overload in high-performance amplifiers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollecting Glass—an Overview\u003c\/strong\u003e – Navigate the competitive world of the vintage audio market with expert Charles Ochs. Whether you are a \"purist\" looking for the perfect brand-name tube or an audiophile seeking the ultimate sound, this guide offers essential advice on treasure hunting in junk piles and the ethics of restoring classic \"hollow-state\" hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Review: The BK Power Amps\u003c\/strong\u003e – Join George Brooke as he puts high-efficiency power amplifiers from BK Electronics to the ultimate test. Comparing them against high-end Accuphase gear and driving legendary speakers like Klipschorns, this review determines if these modern designs provide an outstanding basis for a genuine hi-fi system.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCONTENTS\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eVolume 8, Number 1 (1996)\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eArticle\u003c\/th\u003e\n\u003cth align=\"left\"\u003eAuthor(s)\u003c\/th\u003e\n\u003cth align=\"left\"\u003ePage\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eThe Country Boy's Capacitor Microphone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eDavid Royer\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eDriving the 300B\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eReid Welch\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eDistortion in Tubes, Part 2\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eRickard Berglund\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eThe Amplifier Distortion Story, Part 2\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eNorman H. Crowhurst\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e26\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eCollecting Glass—an Overview\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eCharles Ochs\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e34\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eProduct Review: The BK Power Amps\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eGeorge Brooke\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eGlass Case (New Products)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eGlass Shard: Mu-Follower for the 300B\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eRickard Berglund\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e47\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eBook Reports\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eV \u0026amp; T News\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e51\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eLetters\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e52\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eClassifieds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e60\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eAd Index\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e61\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eClubs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e62\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNote: Page numbers are based on the table of contents and article headers provided in the source.\u003c\/em\u003e\u003c\/p\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":47552005538006,"sku":"AA-GA96-1PDF","price":6.95,"currency_code":"USD","in_stock":true}]},{"product_id":"glass-audio-1997-issue-1-of-6","title":"Glass Audio 1997 Issue 1  (of 6)","description":"\u003cp\u003e\u003cimg\u003e\u003cspan\u003e\u003cstrong\u003e1997 Issue 1 (of 6) of Glass Audio - in PDF format\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eLink emailed immediately upon purchase\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg\u003e\u003c\/p\u003e\n\u003cp\u003eExperience the cutting edge of high-power engineering and precision measurement with \u003cstrong\u003eVolume 9, Number 1 of \u003cem\u003eGlass Audio\u003c\/em\u003e (1997)\u003c\/strong\u003e. This issue features groundbreaking projects and essential technical theory for the serious tube enthusiast:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe 4-250A Beam Tetrode Power Amplifier\u003c\/strong\u003e – Harness the power of heavy-duty industrial transmitting tubes with Michael A. Burrows' ambitious \u003cstrong\u003e175W per channel\u003c\/strong\u003e design. Combining rugged reliability with sophisticated protection circuits—including a custom cool-down cycle—this amplifier is a masterpiece of art and sound efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDistortion in Tubes: Small-Signal Pentodes\u003c\/strong\u003e – Master the complexities of pentode operation with Rickard Berglund’s detailed measurement study. Learn how to find the \u003cstrong\u003e\"isodistortion point\"\u003c\/strong\u003e and use specific screen-grid adjustments to virtually eliminate third-harmonic distortion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA Differential Line Amp with Tubes\u003c\/strong\u003e – High-end designer Erno Borbely delivers a high-quality balanced line amplifier and driver using ECC83 and ECC81 tubes. Explore a topology that offers \u003cstrong\u003eexcellent linearity, rejection of common-mode noise\u003c\/strong\u003e, and the ability to drive just about any power amplifier, including solid-state designs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Search for Linearity, Part 2\u003c\/strong\u003e – Mark Kelly continues his deep dive into the math behind perfect audio, focusing this time on \u003cstrong\u003eactive anode loads\u003c\/strong\u003e. Discover the benefits of the SRPP, mu follower, and \"inverted cascode load\" for maximizing stage gain while maintaining strict linearity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVacuum Tube Electronics: Part 3—Circuit Theory\u003c\/strong\u003e – Expand your technical library with Scott Frankland’s annotated guide to the essential post-WWII texts on \u003cstrong\u003eelectric circuit theory\u003c\/strong\u003e. This installment focuses on mastering network analysis, pole-zero theory, and determining transient response.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShowcase: A Vacuum Tube Preamplifier\u003c\/strong\u003e – Get inspired by Rick Spencer’s stunningly crafted preamp, featuring a unique \u003cstrong\u003esee-through smoked plastic front panel\u003c\/strong\u003e. Pairing the beauty of glowing valves with high-end components, this unit delivers professional looks and \"Daniel\" series performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuest Editorial: You Make Your Pick, I'll Make Mine\u003c\/strong\u003e – Signal processing engineer Greg Berchin offers a refreshingly direct defense of tube audio. Challenging the \"missionary zeal\" of measurement fanatics, he argues that \u003cstrong\u003esubjective perception\u003c\/strong\u003e is the only metric that truly matters for an audiophile.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCONTENTS\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eVolume 9, Number 1 (1997)\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eArticle\u003c\/th\u003e\n\u003cth align=\"left\"\u003eAuthor(s)\u003c\/th\u003e\n\u003cth align=\"left\"\u003ePage\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003e4-250A Beam Tetrode Power Amplifier\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eMichael A. Burrows\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eDistortion in Tubes: Small-Signal Pentodes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eRickard Berglund\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eA Differential Line Amp with Tubes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eErno Borbely\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e24\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eThe Search for Linearity, Part 2\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eMark Kelly\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e32\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eVacuum Tube Electronics: Part 3—Circuit Theory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eScott Frankland\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eGlass Case\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eGuest Editorial: You Make Your Pick, I'll Make Mine\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eGreg Berchin\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eAsk GA\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e44\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eLetters\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eReading Room\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e61\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eShowcase\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e62\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eGlass Shard: Regulated DC for Filaments\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eAdam Stouffer\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e64\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eClassifieds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e66\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eAd Index\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e69\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":48371141509334,"sku":"AA-GA97-1PDF","price":6.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GA-1997-Issue1-infographic.png?v=1783463556"},{"product_id":"glass-audio-1997-issue-2-of-6","title":"Glass Audio 1997 Issue 2 (of 6)","description":"\u003cp\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003e1997 Issue 2 (of 6) of Glass Audio - in PDF format\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eLink emailed immediately upon purchase\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eUnlock the secrets of precision design and high-end performance with \u003cstrong\u003eVolume 9, Number 2 of \u003cem\u003eGlass Audio\u003c\/em\u003e (1997)\u003c\/strong\u003e. This issue features four major DIY projects and expert reviews that bridge the gap between classic tube warmth and modern engineering:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSPICE and the Art of Preamplifier Design, Part 1\u003c\/strong\u003e – Norman Koren demystifies the design process using highly accurate computer modeling. Using the legendary Dynaco PAS as a platform, he demonstrates how to use the free PSpice program to achieve nearly perfect frequency response while eliminating the \"grittiness\" caused by RF interference.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Performance Tubed DAC Output Stage, Part 1\u003c\/strong\u003e – Jukka Tolonen tackles the \"last solid-state fortress\" in the signal chain: the CD player. Learn how computer simulations can help you design a tube stage that matches the technical performance of modern semiconductors, ensuring your digital audio finally \"glows in the dark\".\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAn MC\/MM Preamplifier\u003c\/strong\u003e – High-end designer Erno Borbely delivers a hybrid masterpiece that offers the best of both worlds. By pairing low-noise JFETs with tubes capable of handling large signals, this design achieves professional-grade noise performance and massive overload capability for both moving-coil and moving-magnet cartridges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBig Mother Power Supply\u003c\/strong\u003e – Millard Johnson introduces an over-engineered, \"cost-no-object\" power supply designed to be the heavy-duty heart of any amplifier. Featuring massive computer-grade filter capacitors and regulated outputs for screen grids, this unit is a tube builder's dream that provides a substantial upgrade to imaging and sound quality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBook Review: \u003cem\u003eInside Tube Amps\u003c\/em\u003e\u003c\/strong\u003e – Eric Barbour reviews Dan Torres' accessible guide for musicians and novices. Learn how to troubleshoot, repair, and modify classic Fender and Marshall circuits with this clear, non-technical manual for the hands-on enthusiast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Review: \u003cem\u003eRadiotron Designer's Handbook\u003c\/em\u003e on CD-ROM\u003c\/strong\u003e – David O'Rourke explores the digital reincarnation of the \"holy bible\" of audio design. Discover how this 1,498-page resource has been transformed with interactive hyper-links, making half a century of essential technical data accessible for the modern designer.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCONTENTS\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eVolume 9 Number 2 (1997)\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eArticle\u003c\/th\u003e\n\u003cth align=\"left\"\u003eAuthor(s)\u003c\/th\u003e\n\u003cth align=\"left\"\u003ePage\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eSPICE and the Art of Preamplifier Design, Part 1\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eNorman L. Koren\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eHigh-Performance Tubed DAC Output Stage, Part 1\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eJukka Tolonen\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eAn MC\/MM Preamplifier\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eErno Borbely\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e32\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eBig Mother Power Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eMillard Johnson\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e46\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eProduct Review: \u003cem\u003eRadiotron Designer’s Handbook\u003c\/em\u003e on CD-ROM\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eDavid O’Rourke\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e52\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eGlass Case\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eBook Review: \u003cem\u003eInside Tube Amps\u003c\/em\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eLetters\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e56\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eClassifieds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e67\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eAd Index\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e69\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":48371916341462,"sku":"AA-GA97-2PDF","price":6.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GA-1997-Issue2-infographic..png?v=1783548442"},{"product_id":"glass-audio-1997-issue-4-of-6-copy-copy-1","title":"Glass Audio 1997 Issue 5 (of 6)","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e1997 Issue 5 (of 6) of Glass Audio - in PDF format\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eLink emailed immediately upon purchase\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eExperience the perfect synthesis of classic vacuum tube warmth and modern performance with \u003cstrong\u003eIssue 5 of \u003cem\u003eGlass Audio\u003c\/em\u003e 1997\u003c\/strong\u003e. This issue provides professional-grade DIY projects and deep technical insights to help you get the most out of your audio system:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent-to-Voltage Converter for CD Output\u003c\/strong\u003e – Eliminate the \"dry, granular character\" of digital audio. Designer David Berning shows you how to give your CD player a complete tube makeover, replacing analog solid-state circuitry with a tubed I\/V converter for the most natural sound possible.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproving the SV811-10 Amplifier\u003c\/strong\u003e – Take your simple single-ended amp to the next level. Eric Barbour offers a robust driver circuit using the undervalued 6GL7 to increase power output and sensitivity, plus a unique eye-tube indicator to make your project truly stand out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasuring Output-Transformer Performance\u003c\/strong\u003e – Rethink everything you know about these complex devices. Designer Menno J. van der Veen chronicles OPT behavior and provides eye-opening conclusions on how output transformer linearity defines the ultimate quality of a tube amplifier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBehemoth Tamed\u003c\/strong\u003e – Bring new life to the venerable Dyna MkVI. Paul Becker’s rejuvenation project utilizes new tubes and an independent cathode-bias scheme to solve common failure points and deliver improved dynamics from this classic high-power design.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA Better Tube Tester\u003c\/strong\u003e – Never buy a dud tube again. John Shelley provides a guide to building a high-sensitivity, portable checker designed to hunt down elusive electrical leaks that conventional military and commercial testers often miss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3M’s Tube and Chassis Damping\u003c\/strong\u003e – Explore the cutting edge of vibration control. David Davenport reviews 3M's latest viscoelastic products, demonstrating how aerospace and automotive technology can be used to eliminate sonic coloration in your chassis and tubes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCONTENTS\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eVolume 9 Number 5 (1997)\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eArticle\u003c\/th\u003e\n\u003cth align=\"left\"\u003eAuthor(s)\u003c\/th\u003e\n\u003cth align=\"left\"\u003ePage\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eCurrent-to-Voltage Converter for CD Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eDavid Berning\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eImproving the SV811-10 Amplifier\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eEric Barbour\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eMeasuring Output-Transformer Performance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eMenno J. van der Veen\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eBehemoth Tamed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003ePaul Becker\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e36\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eA Better Tube Tester\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eJohn Shelley\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eProduct Review: \u003cem\u003e3M’s Tube and Chassis Damping\u003c\/em\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eDavid Davenport\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e46\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eGlass Case\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eAsk GA\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eLetters\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e56\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eClassifieds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e64\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eAd Index\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e64\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eGlass Shards\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e67\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eVintage Glass: Pilot AA-901\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eEric Barbour\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e69\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNote: Page numbers are based on the table of contents and article headers provided in the sources.\u003c\/em\u003e\u003c\/p\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":48377430474966,"sku":"AA-GA97-5PDF","price":6.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GA-1997-Issue5-infographic..png?v=1783548879"},{"product_id":"glass-audio-1997-issue-6-of-6","title":"Glass Audio 1997 Issue 6 (of 6)","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e1997 Issue 6 (of 6) of Glass Audio - in PDF format\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eLink emailed immediately upon purchase\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eDiscover the secrets to superior tube selection and professional-grade restoration with \u003cstrong\u003eVolume 9, Number 6 of \u003cem\u003eGlass Audio\u003c\/em\u003e (1997)\u003c\/strong\u003e. This issue concludes the year with essential surveys and high-performance projects for the serious vacuum tube designer:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudio Preamp Tubes: A Survey\u003c\/strong\u003e – Cut through the marketing hype and \"self-appointed expert\" opinions with Eric Barbour's candid survey. Drawing on over 20 years of experience, Barbour reveals why popular choices like the 12AX7 might be \"mushy\" and provides a definitive list of \"best bets\"—including hidden gems from the world of vintage television—to help you achieve the ultimate audio performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrolytic Capacitor Reforming Unit\u003c\/strong\u003e – Give your vintage components a \"Lazarus project\" second life. Charles Hansen provides a complete guide to building a device that safely restores aluminum electrolytic capacitors from surplus or long-dormant equipment, doubling as a current-limited high-voltage DC power supply for your test bench.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSE Amp Output Impedance Revisited\u003c\/strong\u003e – Master the \"puzzling\" bass performance of single-ended amplifiers. Eduardo de Lima uses Thiele\/Small theory and complex acoustical modeling to show how you can actually turn high output impedance to your advantage, achieving greater efficiency and a remarkably open midrange.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Search for Linearity, Part 3\u003c\/strong\u003e – Mark Kelly concludes his ambitious series by delivering the complete preamp and power amplifier circuits for his active-load triode design. Explore a high-power topology designed from the ground up to achieve 100dB signal levels with \"spooky\" clarity and organic integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Report: The S.E.X. Kit\u003c\/strong\u003e – Discover why André Jute calls Daniel Schmalle's Single-Ended Experimenter’s kit a \"breakthrough\" for the budget-conscious audiophile. This thorough review explores how a clever design using mass-produced parts delivers riveting sound and provides the perfect \"test mule\" for your own future modifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBook Report: \u003cem\u003eBeginner’s Guide to Tube Audio Design\u003c\/em\u003e\u003c\/strong\u003e – Scott Frankland reviews Bruce Rozenblit's essential text, describing it as a \"DIY breakthrough\". Whether you are a novice or an experienced designer, this book offers a systematic distillation of experience, helping you find your own \"recipe for success\" in tube circuit design.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCONTENTS\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eVolume 9 Number 6 (1997)\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eArticle\u003c\/th\u003e\n\u003cth align=\"left\"\u003eAuthor(s)\u003c\/th\u003e\n\u003cth align=\"left\"\u003ePage\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eAudio Preamp Tubes: A Survey\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eEric Barbour\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eElectrolytic Capacitor Reforming Unit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eCharles Hansen\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eSE Amp Output Impedance Revisited\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eEduardo B.E. De Lima\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e28\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eThe Search for Linearity, Part 3\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eMark Kelly\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e42\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eKit Report: Single-Ended Experimenter’s Kit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eAndré Juté\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e54\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eBook Report: \u003cem\u003eBeginner’s Guide to Tube Audio Design\u003c\/em\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eScott Frankland\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e68\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eClassifieds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e72\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eAd Index\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e72\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eLetters\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e74\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNote: Page numbers are based on the table of contents provided in the source.\u003c\/em\u003e\u003c\/p\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":48377434407126,"sku":"AA-GA97-6PDF","price":6.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GA-1997-Issue6-infographic..png?v=1783548994"},{"product_id":"glass-audio-1997-issue-3-of-6","title":"Glass Audio 1997 Issue 3 (of 6)","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e1997 Issue 3 (of 6) of Glass Audio - in PDF format\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eLink emailed immediately upon purchase\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"paragraph normal ng-star-inserted\"\u003e\n\u003cspan class=\"ng-star-inserted\"\u003eDiscover the secrets of \"mysterious\" Japanese audio design and master the technical nuances of single-ended performance with \u003c\/span\u003e\u003cb class=\"ng-star-inserted\"\u003eVolume 9, Number 3 of \u003c\/b\u003e\u003cb class=\"italic ng-star-inserted\"\u003eGlass Audio\u003c\/b\u003e\u003cb class=\"ng-star-inserted\"\u003e (1997)\u003c\/b\u003e\u003cspan class=\"ng-star-inserted\"\u003e. This issue features groundbreaking revisited designs, essential measurement studies, and projects for every skill level:\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cul class=\"ng-star-inserted\"\u003e\n\u003cli class=\"paragraph list-item normal ng-star-inserted\"\u003e\n\u003cb class=\"ng-star-inserted\"\u003eTransformer-Coupled SE Amp Revisited\u003c\/b\u003e\u003cspan class=\"ng-star-inserted\"\u003e – Return to the source of the American single-ended revolution. Renowned designer Nobu Shishido revisits his groundbreaking 1994 work with an improved circuit that eliminates coupling capacitors and introduces lower-cost transformer alternatives from Japan, proving that \"empirical\" design can lead to sonic perfection\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cbutton class=\"xap-inline-dialog citation-marker ng-star-inserted\"\u003e\u003c\/button\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cbutton class=\"citation-marker\"\u003e\u003c\/button\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"paragraph list-item normal ng-star-inserted\"\u003e\n\u003cb class=\"ng-star-inserted\"\u003eOptimizing the 2A3 Performance\u003c\/b\u003e\u003cspan class=\"ng-star-inserted\"\u003e – Master the iconic 2A3 triode through real-time spectral analysis. Donald Jenkins reveals an elaborate procedure for finding the exact \"dynamic\" operating point required to achieve absolute minimum distortion, proving that even legendary vintage tubes have hidden performance depths\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cbutton class=\"xap-inline-dialog citation-marker ng-star-inserted\"\u003e\u003c\/button\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cbutton class=\"citation-marker\"\u003e\u003c\/button\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"paragraph list-item normal ng-star-inserted\"\u003e\n\u003cb class=\"ng-star-inserted\"\u003eSimple Gain Circuits\u003c\/b\u003e\u003cspan class=\"ng-star-inserted\"\u003e – Build your technical foundation with an exclusive excerpt from Bruce Rozenblit’s \u003c\/span\u003e\u003ci class=\"ng-star-inserted\"\u003eBeginner’s Guide to Tube Audio Design\u003c\/i\u003e\u003cspan class=\"ng-star-inserted\"\u003e. This guide demystifies the design process for triode and pentode voltage amplifiers, helping you navigate the critical trade-offs between gain, bandwidth, and impedance\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cbutton class=\"xap-inline-dialog citation-marker ng-star-inserted\"\u003e\u003c\/button\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cbutton class=\"citation-marker\"\u003e\u003c\/button\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"paragraph list-item normal ng-star-inserted\"\u003e\n\u003cb class=\"ng-star-inserted\"\u003eA Battery Tube Hi-Fi Amplifier\u003c\/b\u003e\u003cspan class=\"ng-star-inserted\"\u003e – High performance doesn't have to mean high voltage. Larry Lisle presents a safe, battery-powered SE project that eliminates hum and noise while delivering \"first-class\" triode sound with less than 1% distortion—the ideal starting point for the \"squeamish\" novice\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cbutton class=\"xap-inline-dialog citation-marker ng-star-inserted\"\u003e\u003c\/button\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cbutton class=\"citation-marker\"\u003e\u003c\/button\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"paragraph list-item normal ng-star-inserted\"\u003e\n\u003cb class=\"ng-star-inserted\"\u003eSE Amplifier Output Impedance\u003c\/b\u003e\u003cspan class=\"ng-star-inserted\"\u003e – Solve the mystery of why single-ended amps sound so remarkably natural. Eduardo de Lima explores the complex interface between high output impedance and loudspeakers, revealing how this unique \"modulation\" of the frequency response can actually enhance midrange transparency\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cbutton class=\"xap-inline-dialog citation-marker ng-star-inserted\"\u003e\u003c\/button\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cbutton class=\"citation-marker\"\u003e\u003c\/button\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"paragraph list-item normal ng-star-inserted\"\u003e\n\u003cb class=\"ng-star-inserted\"\u003eGlass Shard: Transformer Phase Inverter\u003c\/b\u003e\u003cspan class=\"ng-star-inserted\"\u003e – Stop front-end oscillations before they start. Chris Wolf shares a clever \"cost-be-damned\" solution using an interstage transformer to replace problematic split-load phase inverters in high-power triode projects\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cbutton class=\"xap-inline-dialog citation-marker ng-star-inserted\"\u003e\u003c\/button\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cbutton class=\"citation-marker\"\u003e\u003c\/button\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"paragraph list-item normal ng-star-inserted\"\u003e\n\u003cb class=\"ng-star-inserted\"\u003eVintage Glass: Eico HF20 Amplifier\u003c\/b\u003e\u003cspan class=\"ng-star-inserted\"\u003e – Take a deep dive into the architecture of a golden-era classic. This issue includes a comprehensive schematic and detailed parts list for the venerable Eico HF20\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e\u003cbutton class=\"xap-inline-dialog citation-marker ng-star-inserted\"\u003e\u003c\/button\u003e\u003c\/span\u003e\u003cspan class=\"ng-star-inserted\"\u003e.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"paragraph heading3 ng-star-inserted\" role=\"heading\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eCONTENTS\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"paragraph normal ng-star-inserted\"\u003e\u003cb class=\"ng-star-inserted\"\u003eVolume 9, Number 3 (1997)\u003c\/b\u003e\u003c\/div\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr class=\"ng-star-inserted\"\u003e\n\u003cth class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eArticle\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/th\u003e\n\u003cth class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eAuthor(s)\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/th\u003e\n\u003cth class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003ePage\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"ng-star-inserted\"\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cb class=\"ng-star-inserted\"\u003eTransformer-Coupled SE Amp Revisited\u003c\/b\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eNobu K. Shishido\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e1\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"ng-star-inserted\"\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cb class=\"ng-star-inserted\"\u003eOptimizing the 2A3 Performance\u003c\/b\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eDonald Jenkins\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e22\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"ng-star-inserted\"\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cb class=\"ng-star-inserted\"\u003eSimple Gain Circuits\u003c\/b\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eBruce Rozenblit\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e30\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"ng-star-inserted\"\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cb class=\"ng-star-inserted\"\u003eA Battery Tube Hi-Fi Amplifier\u003c\/b\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eLarry Lisle\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e38\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"ng-star-inserted\"\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cb class=\"ng-star-inserted\"\u003eSE Amplifier Output Impedance\u003c\/b\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eEduardo B. E. de Lima\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e42\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"ng-star-inserted\"\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cb class=\"ng-star-inserted\"\u003eAsk GA\u003c\/b\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e—\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e50\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"ng-star-inserted\"\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cb class=\"ng-star-inserted\"\u003eLetters\u003c\/b\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e—\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e54\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"ng-star-inserted\"\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cb class=\"ng-star-inserted\"\u003eClassifieds\u003c\/b\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e—\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e64\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"ng-star-inserted\"\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cb class=\"ng-star-inserted\"\u003eAd Index\u003c\/b\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e—\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e64\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"ng-star-inserted\"\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cb class=\"ng-star-inserted\"\u003eGlass Shard: Transformer Phase Inverter\u003c\/b\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003eChris Wolf\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e68\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"ng-star-inserted\"\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cb class=\"ng-star-inserted\"\u003eVintage Glass: Eico HF20 Amplifier\u003c\/b\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e—\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003ctd class=\"ng-star-inserted\"\u003e\n\u003cdiv class=\"paragraph table-paragraph normal ng-star-inserted\"\u003e\u003cspan class=\"ng-star-inserted\"\u003e69\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":48377495847126,"sku":"AA-GA97-3PDF","price":6.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GA-1997-Issue3-infographic..png?v=1783548621"},{"product_id":"glass-audio-1997-issue-4-of-6","title":"Glass Audio 1997 Issue 4 (of 6)","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e1997 Issue 4 (of 6) of Glass Audio - in PDF format\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eLink emailed immediately upon purchase\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eExperience the perfect blend of technical measurement and subjective listening with \u003cstrong\u003eVolume 9, Number 4 of \u003cem\u003eGlass Audio\u003c\/em\u003e (1997)\u003c\/strong\u003e. This issue provides a deep dive into the following featured articles and projects:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSound of the Machine: The Hidden Harmonics Behind THD\u003c\/strong\u003e – Professional speaker designer Lynn Olson and Matt Kamna of Tektronix use \u003cstrong\u003eelaborate spectrum analysis\u003c\/strong\u003e to reveal why traditional total harmonic distortion (THD) measurements often fail to reflect what we actually hear. Discover how \"hidden\" patterns of even and odd harmonics define the unique sonic signature of various tube circuits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Performance Tubed DAC Output Stage, Part 2\u003c\/strong\u003e – Jukka Tolonen moves from simulation to practice, delivering a \u003cstrong\u003ecomplete, workable design\u003c\/strong\u003e for a tubed output stage to replace semiconductor stages in existing CD players. This installment includes a \u003cstrong\u003eprinted circuit board layout\u003c\/strong\u003e, regulated power supplies, and construction details for a smooth-sounding amplifier.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSPICE and the Art of Preamp Design, Part 2\u003c\/strong\u003e – Norman Koren concludes his study on using \u003cstrong\u003ecomputer modeling\u003c\/strong\u003e to demystify high-end design. This part focuses on line-amplifier versions, exploring the pros and cons of tone controls and demonstrating how SPICE can achieve \u003cstrong\u003enearly perfect frequency response\u003c\/strong\u003e while taming RF interference.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA WWII “VT”\/Generic Conversion Tube Chart\u003c\/strong\u003e – Decipher the military’s secret codes with Frederick Seitz's \u003cstrong\u003eessential conversion chart\u003c\/strong\u003e. Whether you've found \"gold\" at a garage sale or have a stash of vintage surplus, this guide links military \"VT\" numbers to their usable modern equivalents.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuest Editorial: The Impedance Wars\u003c\/strong\u003e – André Jute explores the \"bitter battle\" over load impedance and the \u003cstrong\u003econtroversy surrounding tapped output transformers\u003c\/strong\u003e. He urges designers to look past established dogmas and keep an open mind to achieve better sound quality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlass Shard: Ye Olde Test Mule\u003c\/strong\u003e – Stop letting your spare parts gather dust! Chris Wolf provides a guide for building a permanent \u003cstrong\u003etube-type test mule\u003c\/strong\u003e, turning your collection of extras into a versatile bench tool for testing new circuits without the need for constant fabbing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCONTENTS\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eVolume 9 Number 4 (1997)\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eArticle\u003c\/th\u003e\n\u003cth align=\"left\"\u003eAuthor(s)\u003c\/th\u003e\n\u003cth align=\"left\"\u003ePage\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eSound of the Machine: The Hidden Harmonics Behind THD\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eLynn Olson and Matt Kamna\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eHigh-Performance Tubed DAC Output Stage, Part 2\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eJukka Tolonen\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e26\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eSPICE and the Art of Preamp Design, Part 2\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eNorman Koren\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e38\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eA WWII “VT”\/Generic Conversion Tube Chart\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eFrederick J. Seitz\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e52\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eGlass Case\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eGuest Editorial: The Impedance Wars\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eAndré Jute\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eLetters\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e57\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eClassifieds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e64\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eAd Index\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e64\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eGlass Shard: Ye Olde Test Mule\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eChris Wolf\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e69\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNote: Page numbers are based on the table of contents provided in the source.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cbr\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":48377500795094,"sku":"AA-GA97-4PDF","price":6.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GA-1997-Issue4-infographic..png?v=1783548696"},{"product_id":"glass-audio-1989-issue-1-of-2","title":"Glass Audio 1989 Issue 1 (of 2)","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e1989 Issue 1 (of 2) of Glass Audio - in PDF format\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eLink emailed immediately upon purchase\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eWelcome to the inaugural issue of \u003cstrong\u003eVolume 1, Number 1 of \u003cem\u003eGlass Audio\u003c\/em\u003e (1989)\u003c\/strong\u003e. This collector's item marks the beginning of a new place for vacuum tube enthusiasts to swap designs, experiences, and discoveries.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eST-70 With Solid-State Regulation\u003c\/strong\u003e – Joe Curcio delivers a \"no compromise\" update to the classic Dynaco Stereo 70. By replacing the original driver stage with an all-triode design and introducing sophisticated \u003cstrong\u003eservo-controlled solid-state regulation\u003c\/strong\u003e, this modification is engineered to excel in definition, dynamics, and imaging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUK ROUND-UP\u003c\/strong\u003e – Join Ken Kessler as he reports on the \"rising tide of hollow-state hardware\" in the United Kingdom. Discover iconoclastic models like the Audion Silver Night and Valfet power amplifiers that are leading the British resurgence in tube technology.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA Vacuum Tube Denon CD\u003c\/strong\u003e – Richard Painter tackles the \"dry, granular character\" of early digital audio by replacing the stock solid-state output stage of a Denon DCD 1500 with a \u003cstrong\u003evacuum tube line stage\u003c\/strong\u003e. Learn how this DIY project brings \"warmth, richness and apparent dynamics\" to your CD collection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRestore Your Scott Tuner\u003c\/strong\u003e – Victor Staggs shares essential restorative techniques after rescuing a vintage H. H. Scott LT-110 FM tuner for just $1. This article provides a roadmap for troubleshooting, chassis cleaning, and \u003cstrong\u003emultiplex alignment\u003c\/strong\u003e to bring classic stereo performance back to life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eASK GA: Feedback and Load Lines\u003c\/strong\u003e – Technical legend Norman Crowhurst demystifies the complexities of \u003cstrong\u003eloop feedback\u003c\/strong\u003e and AC load lines. Using detailed equivalent circuits, he explains how output loads affect loop gain and transient response in high-level stages.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorld Directory of Tube Electronics Manufacturers\u003c\/strong\u003e – Access a comprehensive, country-by-country guide to global manufacturers of tube amplifiers, preamplifiers, and specialized tube CD players—an essential resource for any serious \"hollow-state\" enthusiast.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCONTENTS\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eVolume 1, Number 1 (1989)\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eArticle\u003c\/th\u003e\n\u003cth align=\"left\"\u003eAuthor(s)\u003c\/th\u003e\n\u003cth align=\"left\"\u003ePage\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eST-70 With Solid-State Regulation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eJoe Curcio\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eUK ROUND-UP\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eKen Kessler\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eA Vacuum Tube Denon CD\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eRichard Painter\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eRestore Your Scott Tuner\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eVictor Staggs\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eASK GA\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eNorman Crowhurst\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e24\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eTUBE DIRECTORY\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e27\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eLETTERS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e29\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eCLASSIFIED\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e31\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNote: Page numbers are based on the table of contents provided in the source.\u003c\/em\u003e\u003c\/p\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":48377508266198,"sku":"AA-GA89-1PDF","price":6.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GlassAudio1989Issue1-1_b7173eeb-ef74-4f08-92d9-98d8ee306a3c.png?v=1783549959"},{"product_id":"glass-audio-1989-issue-2-of-2","title":"Glass Audio 1989 Issue 2 (of 2)","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e1989 Issue 2 (of 2) of Glass Audio - in PDF format\u003c\/strong\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eExperience the preservation and evolution of \"hollow-state\" technology with \u003cstrong\u003eVolume 1, Number 2 of \u003cem\u003eGlass Audio\u003c\/em\u003e (1989)\u003c\/strong\u003e. This issue provides essential projects for extending the life of your equipment and maximizing the performance of classic designs:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoft Start for Tubes\u003c\/strong\u003e – Protect your precious vacuum tubes from the \"hard shock\" of sudden power-on. Roy Mottram introduces a sophisticated two-stage turn-on circuit that ramps up filament voltage before engaging the high-voltage supply, effectively eliminating turn-on shock and significantly extending tube life,.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRejuvenating Dyna’s Mark IV\u003c\/strong\u003e – Give your classic Dynaco a performance boost without breaking the bank. Paul Becker shares simple, inexpensive modifications to allow the use of unmatched output tubes, eliminate the need for expensive 5AR4 rectifiers, and provide regulated power for the driver stage,.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLooking At Vacuum Tube Rectifiers\u003c\/strong\u003e – Discover why many audiophiles still prefer the \"slow\" turn-on of a tube rectifier over modern silicon. John McFadden explores how the internal resistance and transient response of tube rectifiers define the sonic character of high-end power supplies,.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtending Tube Life\u003c\/strong\u003e – Learn the secret to making your tubes last for years. Charles King investigates the critical relationship between filament voltage and longevity, demonstrating how running heaters slightly below nominal voltage can dramatically increase lifespan without sacrificing performance,.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransformer Hunting\u003c\/strong\u003e – Turn your local flea market into a high-end parts warehouse. Audio legend Norman Crowhurst provides an essential guide to identifying, testing, and scoring vintage transformers for pennies on the dollar, helping you find \"gold\" in the scrap metal pile,.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Report: Five Dynaco ST-70 Mods\u003c\/strong\u003e – Take the guesswork out of your next upgrade with this massive comparison test. Roy Mottram evaluates five major modification kits—including designs from Curcio, Sutherland, and VTA—measuring their technical performance and subjective sound quality to find the best value for your dollar,.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Views\u003c\/strong\u003e – Join Ken Kessler for a global survey of the tube renaissance. From the latest \"miniature\" high-end integrated amps in France to the rising tide of new hardware in the UK, stay informed on the international scene,.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCONTENTS\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eVolume 1 Number 2 (1989)\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eArticle\u003c\/th\u003e\n\u003cth align=\"left\"\u003eAuthor(s)\u003c\/th\u003e\n\u003cth align=\"left\"\u003ePage\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eSoft Start For Tubes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eRoy Mottram\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eRejuvenating Dyna’s Mark IV\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003ePaul Becker\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eLooking At Vacuum Tube Rectifiers\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eJohn J. McFadden\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e13\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eExtending Tube Life\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eCharles King\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eTransformer Hunting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eNorman Crowhurst\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e24\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eKit Report: ST-70 Mods\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eRoy Mottram\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e26\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eValve View\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eKen Kessler\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eTube Directory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eLetters\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e34\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eGlass Case\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e44\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eClassified\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e45\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNote: Page numbers are based on the table of contents and article headers provided in the source.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":48377512165590,"sku":"AA-GA89-2PDF","price":6.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GlassAudio1989Issue2-1.png?v=1783550009"},{"product_id":"glass-audio-1994-issue-1-of-4","title":"Glass Audio 1994 Issue 1 (of 4)","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e1994 Issue 1 (of 4) of Glass Audio - in PDF format\u003c\/strong\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eLink emailed immediately upon purchase\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eStep into the world of high-end vacuum tube design with \u003cstrong\u003eVolume 6, Number 1 of \u003cem\u003eGlass Audio\u003c\/em\u003e (1994)\u003c\/strong\u003e. This issue features groundbreaking projects and international insights for the serious audiophile:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransformer Coupled WE-300B Single-Ended Amp\u003c\/strong\u003e – Renowned designer Nobu Shishido demystifies the legendary Japanese \"Directly Heated Triode\" scene. Learn why his unique approach using \u003cstrong\u003einterstage transformer coupling\u003c\/strong\u003e creates a three-dimensional sound that captures the \"vibration of human flesh\" in ways traditional designs cannot match.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA Tube DAC\u003c\/strong\u003e – If early digital audio left you cold, Norman Tracy’s modular outboard digital-to-analog converter is the cure. By pairing a sophisticated 18-bit digital section with a \u003cstrong\u003evacuum tube output stage\u003c\/strong\u003e, this project brings \"emotional involvement\" and musicality back to your CD collection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA Dual 1 + 1 Cascade Amplifier\u003c\/strong\u003e – Eric Barbour provides a sleek, high-performance feedback amplifier designed specifically for the experimenter. With a compact PC board layout that fits into narrow rack-mount cabinets, it is an \u003cstrong\u003eideal versatile building block\u003c\/strong\u003e for your next audio project.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Views: The Global Tube Renaissance\u003c\/strong\u003e – Join Ken Kessler as he reports on the \"rising tide of hollow-state hardware\" worldwide. From the DIY-mad enthusiasts in Italy to the latest high-end displays in Milan, discover the \u003cstrong\u003einnovative hardware\u003c\/strong\u003e reshaping the international audio landscape.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Report: Integrated Magnetics\u003c\/strong\u003e – Explore the cutting edge of power supply design with Fernando Garcia’s review of the IMagine kit. Discover how \u003cstrong\u003eswitch-mode power supplies\u003c\/strong\u003e and integrated magnetics can provide clean, high-current heater power for your tubes in a fraction of the space.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlass Shards: Asymmetrical Followers\u003c\/strong\u003e – Master the asymmetrical $\\mu$-follower, a two-tube circuit topology that delivers \u003cstrong\u003elow distortion, low output impedance, and high gain\u003c\/strong\u003e simultaneously. Rickard Berglund provides the component values and technical theory needed to use this circuit as a driver for headphones or in preamplifiers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCONTENTS\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eVolume 6, Number 1 (1994)\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eArticle\u003c\/th\u003e\n\u003cth align=\"left\"\u003eAuthor(s)\u003c\/th\u003e\n\u003cth align=\"left\"\u003ePage\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eTransformer Coupled WE-300B Single-Ended Amp\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eNobu K. Shishido\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eA Tube DAC\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eNorman Tracy\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e14\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eA Dual 1 + 1 Cascade Amplifier\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eEric Barbour\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e32\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eValve Views\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eKen Kessler\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eEditorial: How We Began\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eEdward T. Dell, Jr.\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eAsk GA\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eEric Barbour\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e34\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eKit Report: e\/j BLOOM’S IMagine Kit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eFernando Garcia\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e36\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eGlass Shards: Asymmetrical Followers\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eRickard Berglund\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e42\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eLetters\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e46\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eClassifieds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eAd Index\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e54\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNote: Page numbers are based on the table of contents provided in the sources.\u003c\/em\u003e\u003c\/p\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":48377565315286,"sku":"AA-GA94-1PDF","price":6.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GlassAudio1994Issue1-1.png?v=1783632068"},{"product_id":"glass-audio-1994-issue-2-of-4","title":"Glass Audio 1994 Issue 2 (of 4)","description":"\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e1994 Issue 2 (of 4) of Glass Audio - in PDF format\u003c\/strong\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eLink emailed immediately upon purchase\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eStep into the world of advanced \"hollow-state\" engineering and international audio trends with \u003cstrong\u003eVolume 6, Number 2 of \u003cem\u003eGlass Audio\u003c\/em\u003e (1994)\u003c\/strong\u003e. This issue features expert circuit analysis, classic restorations, and a comprehensive guide to the global tube market:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCascode Construction\u003c\/strong\u003e – Denzil Danner breaks down one of the most misunderstood circuit topologies. Learn how to optimize cascodes for highest-output-level power amp drivers or maximize gain for low-level stages, with detailed analysis of trade-offs and practical component selection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA New Dynaco PAS Upgrade\u003c\/strong\u003e – Transform your classic Dynaco into a modern high-end contender. Norman Koren delivers a \"no-compromise\" upgrade that focuses on reducing output impedance and improving square-wave response, ensuring your vintage gear rivals the best of today's audiophile equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmending Brian Lowe’s Servo Bias System\u003c\/strong\u003e – Master the art of stable bias. Andrew Nehan introduces sophisticated modifications to the self-bias servo for output tubes, including a protective \"soft-start\" delay and a clever LED indicator system to help you diagnose tube health at a glance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Transformers, Part 1\u003c\/strong\u003e – Gain a fundamental understanding of the critical link between your tubes and speakers. James Moir demystifies the matching process, explaining how transformers control frequency response and identifying the specific factors that introduce sonic distortion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Views: The Global Tube Revolution\u003c\/strong\u003e – Join Ken Kessler for a whirlwind tour of the international tube scene. From the \"tasty\" high-end displays at the Las Vegas CES to the boutique hardware of the Festival du Son in Paris, discover the latest innovations shaping the future of audio.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEditorial: Looking Backward \u0026amp; Forward\u003c\/strong\u003e – Reflect on the \"archaeology of tube technology.\" Editor Edward T. Dell, Jr. explores the exciting synergy between classic vacuum tube circuits and modern solid-state enhancements, like regulators and timers, to achieve unprecedented audio precision.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAsk GA: Tube Supplies Update\u003c\/strong\u003e – Stay informed on the ever-changing tube market. Eric Barbour provides a critical update on global factory closures and the availability of essential tubes like the EL34 and 6550, plus expert advice on troubleshooting vintage testers and preamps.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlass Shards: Circuit Innovations \u0026amp; Restoration\u003c\/strong\u003e – Explore the new \"Cathanode Follower\" for 100% voltage feedback and learn professional techniques for \"re-forming\" old electrolytic capacitors to give your vintage gear a second life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCONTENTS\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eVolume 6, Number 2 (1994)\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth align=\"left\"\u003eArticle\u003c\/th\u003e\n\u003cth align=\"left\"\u003eAuthor(s)\u003c\/th\u003e\n\u003cth align=\"left\"\u003ePage\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eCascode Construction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eDenzil Danner\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eA New Dynaco PAS Upgrade\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eNorman L. Koren\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eAmending Brian Lowe’s Servo Bias System\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eAndrew Nehan\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eOutput Transformers, Part 1\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eJames Moir\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e24\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eValve Views\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eKen Kessler\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eEditorial: Looking Backward \u0026amp; Forward\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eAsk GA\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eEric Barbour\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e32\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eGlass Shards\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e38\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eLetters\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eClassifieds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e49\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eAd Index\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e53\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003eGlass Case\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e54\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd align=\"left\"\u003e\u003cstrong\u003e94-95 World Tube Directory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd align=\"left\"\u003e—\u003c\/td\u003e\n\u003ctd align=\"left\"\u003eSupplement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eNote: Page numbers are based on the table of contents and article headers provided in the source.\u003c\/em\u003e\u003c\/p\u003e","brand":"audioXpress","offers":[{"title":"Default Title","offer_id":48377574588630,"sku":"AA-GA94-2PDF","price":6.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/GlassAudio1994Issue2-1.png?v=1783632386"}],"url":"https:\/\/cc-webshop.com\/collections\/glass-audio-all-available.oembed?page=2","provider":"CC-Webshop","version":"1.0","type":"link"}