{"product_id":"audio-amateur-4-1975-pdf","title":"Audio Amateur 4\/1975 PDF","description":"\u003cp\u003e\u003cstrong\u003eAudio Amateur 4\/1975 PDF -\u003c\/strong\u003e Issue is in black \u0026amp; white\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003eScan of printed copy, PDF download immediately upon purchase\u003c\/p\u003e\n\u003cdiv class=\"message-text-content mat-body-medium\" aria-live=\"polite\"\u003e\n\u003cdiv class=\"paragraph normal ng-star-inserted\" data-start-index=\"0\"\u003e\n\u003cp\u003eThe fourth issue of \u003cstrong\u003e1975\u003c\/strong\u003e for \u003cem\u003eThe Audio Amateur\u003c\/em\u003e celebrates the close of the magazine's fifth year with a heavy focus on precision test equipment, innovative room acoustics, and DIY electrostatic design. Here are the highlights:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMorrey's Super Oscillator\u003c\/strong\u003e: Achieve laboratory-grade precision on an amateur budget. Walter Morrey details how to modify the Heath IG-18 oscillator to reach near-ideal distortion levels—as low as .0005%—making it an essential tool for high-performance audio analysis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA Stereo Delay Line\u003c\/strong\u003e: Bring the \"concert hall\" experience to your listening room. Douglas Preis provides a complete construction guide for an affordable, two-channel acoustical delay line that adds a stunning new dimension of spaciousness and reverberation to your music.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA.L.F. Garbage Filter\u003c\/strong\u003e: Clean up your signal with this versatile general-purpose filter card. Originally conceived as a 30Hz rumble filter, audio legend Walt Jung shows how this design can be adapted to handle almost any active filter task, from crossovers to subsonic suppression.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Sanders Electrostatic Speaker\u003c\/strong\u003e: Experience the legendary transparency and detail of electrostatic sound. Roger Sanders provides a comprehensive, step-by-step guide to building your own full-range electrostatic panels, including the complex construction of wire stators and high-voltage polarizing supplies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat is PCM? Part 2\u003c\/strong\u003e: Go inside the digital revolution. Reg Williamson continues his definitive look at Pulse Code Modulation, explaining the working principles of the BBC’s advanced sound distribution systems and how digital technology ensures absolute signal integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudio Aids\u003c\/strong\u003e: This issue is packed with technical wisdom from readers, featuring a method for \u003cstrong\u003emeasuring crossover distortion\u003c\/strong\u003e in power amplifiers and a design for a \u003cstrong\u003etransformerless balanced output\u003c\/strong\u003e for professional-grade signal management.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClassic Circuitry\u003c\/strong\u003e: Study the engineering of a vintage icon. This issue includes the full, detailed schematic for the \u003cstrong\u003eMarantz Electronic Crossover\u003c\/strong\u003e, offering a valuable reference for tube enthusiasts and restorers of high-end vintage gear.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cstrong\u003eTable of Contents\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMorrey's Super Oscillator\u003c\/strong\u003e: by Walter T. Morrey ................................................................ \u003cstrong\u003e3\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA Stereo Delay Line\u003c\/strong\u003e: by Douglas H. Preis .......................................................................... \u003cstrong\u003e10\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA.L.F. Garbage Filter\u003c\/strong\u003e: by Walt Jung ................................................................................... \u003cstrong\u003e14\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Sanders Electrostatic Speaker\u003c\/strong\u003e: by Roger R. Sanders .......................................... \u003cstrong\u003e18\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhat is PCM? Part 2\u003c\/strong\u003e: by Reg Williamson ........................................................................ \u003cstrong\u003e30\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudio Aids\u003c\/strong\u003e: by readers Great American Sound, James A. Mears, and others ............ \u003cstrong\u003e34\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClassic Circuitry\u003c\/strong\u003e: The Marantz Electronic Crossover ....................................................... \u003cstrong\u003e38\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLETTERS\u003c\/strong\u003e ................................................................................................................................. \u003cstrong\u003e40\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCLASSIFIED\u003c\/strong\u003e ............................................................................................................................. \u003cstrong\u003e43\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAD INDEX\u003c\/strong\u003e ............................................................................................................................... \u003cstrong\u003e59\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"CC-Webshop","offers":[{"title":"Default Title","offer_id":48323943825622,"sku":"AA-4-1975","price":9.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0021\/5013\/7974\/files\/75_04_cover.jpg?v=1780600901","url":"https:\/\/cc-webshop.com\/products\/audio-amateur-4-1975-pdf","provider":"CC-Webshop","version":"1.0","type":"link"}