Audio Amateur 2/1984 PDF

Audio Amateur 2/1984 PDF - Issue is in black & white
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ARTICLES

CONVERT YOUR TURNTABLE TO BELT DRIVE
By J.L. Markwalter — Page 7
This article offers a practical and cost-effective method to upgrade older idler-driven turntables to belt drive. It includes a historical perspective on turntable designs and detailed instructions on selecting and installing a synchronous motor and belt drive system to improve performance and reduce noise.
THIRD-GENERATION MOSFETS: THE DC 100 (PART II)
By Erno Borbely — Page 13
Continuing from a previous installment, this article explores the design and power-supply details of a 100W MOSFET amplifier using third-generation MOSFETs. It provides technical insights into the amplifier’s circuitry, focusing on stability, performance, and component selection.
A HIGH-VOLTAGE, LOW-Z REGULATOR
By Christopher Paul — Page 25
This article discusses the design of a voltage regulator suitable for high-voltage tube amplifier applications. It covers the challenges of producing stable output voltages with low output impedance, including detailed circuit diagrams and test results for a regulator based on the LM317 integrated circuit.
A WIDE-RANGE OHMMETER
By John T. Bailey — Page 36
This article presents a design for a versatile ohmmeter capable of measuring a wide range of resistances with good accuracy and ease of use. It includes circuit schematics, calibration tips, and explanations of how the meter works, making it a useful tool for electronics hobbyists and professionals.

DEPARTMENTS

CLASSIC CIRCUITRY
The ARC D-150 Amplifier
Courtesy of Jerry Saunders — Page 44

TROUBLESHOOTING
Phono Servicing by Kirk Vistain — Page 46

SHOWCASE
Personalizing Pass Power
By John Adelsbach — Page 49

JUST LOOKING — Page 2
CORRECTIONS — Page 50
LETTERS — Page 50
CLASSIFIED — Page 59
AD INDEX — Page 62