{"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","url":"https:\/\/cc-webshop.com\/products\/glass-audio-1997-issue-1-of-6","provider":"CC-Webshop","version":"1.0","type":"link"}