Audio Amateur 2/1972 PDF
Audio Amateur 2/1972 PDF - Issue is in black & white
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The second issue of 1972 for The Audio Amateur (Issue 2/1972) is a technical powerhouse, featuring innovative DIY engineering from professional-grade tape decks to high-precision signal controls. Here are the highlights to entice your inner audio craftsman:
- Building a 10 1/2" Reel Tape Deck: Stop dreaming of high-capacity recording and start building. Roger Sanders provides a comprehensive guide to constructing a professional-quality playback deck with 10 1/2" reel capacity for a fraction of the cost of commercial units, utilizing ingenious design shortcuts and surplus parts.
- Electronic Crossovers: Experience the "ultimate in sound quality" by moving your crossovers ahead of your power amplifiers . This article explores the theory of active and passive signal dividers, providing schematics and a detailed reactance chart to help you design a multi-amplifier system that slashes intermodulation distortion.
- Stepped Attenuators: Achieve the precision of a laboratory with your volume controls. Learn how to design and build a 23-position level control using a special etched circuit board to ensure your stereo channels track perfectly within ±1dB.
- Tapeniques: Denoising: Conquer the "hiss" that plagues your recordings. James K. Jobson breaks down the sources of tape noise and provides expert advice on utilizing Dolby systems and high-output tapes to achieve studio-quiet backgrounds.
- Learning to Use Transistors: Deepen your understanding of solid-state physics. This installment focuses on basic amplifier circuits, explaining the mechanics of common-emitter and common-base configurations to help you maximize power gain in your custom designs.
- Tips & Technique: Discover a wealth of workshop wisdom from the TAA community, featuring critical thermal stability fixes for "Tiger" amplifiers, instructions for building a non-inductive dummy load, and a clever "blend" control modification for the Dynaco PAT-4.
Table of Contents
- Building a 10 1/2" Reel Tape Deck: by Roger R. Sanders .......................................... 3
- Electronic Crossovers: by E.T. Dell Jr. and J.I. Goldberg ............................................. 9
- Stepped Attenuators: by Fred M. Gloeckler, Jr. ............................................................. 14
- Tips & Technique: by readers Wiley, Hitt, Gloeckler, Novack, and Marovich ............ 18
- Tapeniques: Denoising: by James K. Jobson ................................................................. 21
- Amendments & Corrections: Williamson tape amp.; super op-amp; New Octalizer .... 21
- Learning to use Transistors: Part 9: by C.N.G. Matthews ............................................ 24
- CLASSIFIED ............................................................................................................................... 25
- ADVERTISER INDEX ................................................................................................................ 25
- LETTERS ..................................................................................................................................... 28