|
 |
 |
 |
|
 |
|
 |
|
|
Last Updated
03/31/2019
Sitemap
|
|||||||||
Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
|||||||||
|
PHONOGRAPH sa PHONOGRAPH CARTRIDGE & STYLUS sa PHONOGRAPH MOUNTING sa PHONOGRAPH PREAMPLIFIER sa PHONOGRAPH RECORD sa PHONOGRAPH TONEARM x RECORD PLAYER x TURNTABLE (AUDIO) xx AUDIO EQUIPMENT Modification for the Rabco ST-4 integrated turntable to avoid damage to the stylus and/or recording. Tip on fixing the "rumble" problem in a Rek-O-Kut model B-12 Rondine turntable. Tip on making a temporary phono or tape drive belt from sewing elastic. Improve an AR (Audio Research) turntable's performance by several small modifications. How to eliminate the loud "buzz" when using the Netronics 450D Direct Drive Turntable in conjunction with most CD-4 demodulators. How to buy a gramophone (talking machine). Excepted from a book first published in 1913. Tip on sizing your own rubber drive belts for a turntable, etc. by using cyanoacrylate adhesive. Modify the wiring on a Technics SL-110A or SL-1100A direct drive turntable to play 78 RPM records. Modifying the Rabco ST-4 to add a muting circuit in combination with a remote-controlled cue motor. Classic ciruitry. Schematic diagram of the 412-ED electronic turntable from Fairchild Recording Equipment Co. (circa 1957). Add 78 RPM to a Philips GA-212 turntable. The supression of surface noise. A classic theory which laid down constraints for all of today's phonograph disk quieting systems. Reduce hum from the Kenwood KD-500 turntable. (1) Mount the transformer outboard. (2) Make minor wiring changes. Photoelectric turn-off for manual turntables. Tips on lubricating the motor on a Dual 1019 turntable. Tip on using latex concrete patch mixes to deaden unwanted vibrations in turntables and loudspeaker systems. Tip on improving the electrical contact between a metal turntable and the anti-static pad. Transplanting a variable-frequency drive from a Technics SL-20 into the AR turntable. Convert your idler-driven turntable to belt drive. Phonograph servicing. Troubleshooting tips for signal defects, hum, drive mechanism, tone arms, etc. Modification to eliminate hum on the Dual 1218 phonograph changer. Tip on grounding Technics SLB300 belt-drive turntable to eliminate crackling noise. Acoustic Research (AR) Model XA drive system components are incorporated into this turntable construction project. Tips on modifying the Acoustic Research model XA turntable by adding a replacement motor from Merrill. An electronic speed control for belt-driven turntables employing a synchronous motor. Report on the Merrill modification kit for the Acoustic Research model XA and XB turntables. Tip on replacing the outer platter of an AR (Acoustic Research) turntable with a handcrafted acrylic platter. The Mr.Bill turntable. Combines the best aspects of several commercial designs. Features the VPI acrylic platter-main bearing assembly, four-point hanging spring subchassis, angle-iron stand, and belt drive. Classic circuitry. Schematic for the Newcomb Classic 1500R phonograph amplifier and remote control unit. Stabilizing AC motors for better sound. Build a crystal referenced variable frequency power supply to precisely control the speed of a turntable, tape recorder, or some other device equipped with a synchronous motor. Understanding the RIAA curve in order to achieve maximum fidelity from analog phonograph records. Curing vibration ills. Using low-tech methods to harness and eliminate unwanted vibration effects in audio system components (such as CD players and turntables). Analyzing the dynamic range potential of the phonographic playback system in which the cartridge and preamplifier are treated as an integrated system. Includes a comparison with CD systems. Ways to upgrade the Dual 1229 changer/turntable and other old turntables. Product review of the kit from Origin Live for upgrading the Linn LP12 turntable. Tips on cleaning and lubricating an old Thorens TD-124 turntable. Circuit for a simple phonograph amplifier which uses the LM380 audio power amplifier chip. Add strobe bars to your turntable. Transistorize your phonograph by replacing tube amplifiers with a transistor amplifier. Should result in improved output quality in small phonographs. Convert an inexpensive child's mono phonograph to a stereo unit. Add a 5-watt stereo amplifier, power supply, volume and tone controls, new pickup arm and second speaker. Build a direct-reading wow and flutter meter. Used to measure distortion caused by out-of-round phonograph or tape player components. Part 1. One-tube phono amplifier operates from crystal or ceramic phono cartridge and outputs 1 watt. Build a direct-reading wow and flutter meter. Part 2. A compact stereo you can build has amplifier and record changer in same base. Uses IC amplifier modules capable of delivering 15 watts rms to each speaker. Est. cost: $100. Circuit for connecting a phono jack to an AC/DC radio and avoid the shock hazard. Stereo broadcaster. Convert an inexpensive record player to play stereo records by installing a short-range AM broadcaster inside the phono and playing one track through the second track through a nearby AM radio. Est. cost: $7. Stereofone, a dual IC amplifier designed specifically with input equalization for a magnetic phono cartridge and output to feed stereo headphones. Two step audio filter for restoring old 78 rpm record sound. Used to adjust sound to the "most pleasing" when recording from old 78's. Tips on restoring antique radio-phonograph combinations. How to replace a drive belt in a turntable. Transformation of the AR turntable. Simple mechanical modifications to improve the sonic quality of this venerable turntable/tonearm combination. Simple amplifier circuit for use with a turntable. Amplifier circuit for a turntable is capable of driving a 6" speaker with its 1-watt output. Identifying defective electric motors. Emphasis is on small motors found in VCRs, tape players, turntables, etc. Includes instructions for building a Motor Voltage Box to supply various voltages for checking. How to maintain a turntable or record changer. Covers cleaning and the remedies for most common problems. How to adjust the mechanism that drops the records on a record changer. Child's hand-cranked springless phonograph. Stereo phonograph built into an attache case uses earphones. Electronic circuit to turn off the amplifier and turntable when record stops playing. Does not require an internal wiring change. Convert turntable into radio-phono combination. Simple, inexpensive phono balance. Replace tube-type amplifiers in inexpensive phonographs with a transistorized amplifier. Est. cost: $10. Build a direct-drive turntable which features automatic pitch control and meter-readout strobe. Est. cost: $160 (kit). A look at the National Semiconductor IC type LM389. Supplied in an 18-pin DIP, the device is composed of three uncommited npn transistors and a low-power integrated audio amplifier in a single package. Might be usable in AM & FM receivers, walkie-talkies, tape recorders, toys, games...etc. Circuits for a phono amplifier and tape recorder are shown. Circuit for a scratch filter to attenuate the surface noise on old 78-rpm phonograph records. Vary the speed of synchronous motors with this programmable control. DC-to-AC inverter can be used to control motors in tape drives, turntables, telescopes, electrical timepieces, etc. Modify your turntable to play 78-rpm records. Simple turntable repairs that you can do. Tips on troubleshooting motors, belts/pulleys, wow/flutter, etc. Convert a 78-rpm mono phono to LP stereo and microphones. Stereo and AM radio in a suitcase for $48. A five-way radio breadboard includes a wireless mike, touch alarm, code transmitter, phono oscillator, and AM receiver. Twelve record changer troubles you can cure. Results of Popular Mechanics tests of eleven single play turntables under $130. Build a power meter and stylus timer for your hi-fi system. It tells how many watts are getting to your speakers and how many hours your phonograph stylus has been tracking grooves. Solutions to 10 common turntable problems. A guide to automatic turntables that range from moderately-priced to top-of-the-line models. Notes on some extras that should be present, what to look for and comments on different styles of tracking mechanisms. Turntable design. Part 2. Design elements in the turntable drive and suspension system. Antique radios with built-in phonographs and phono adapters. Tips on troubleshooting. Build a simple stroboscope to check the speed of a turntable. Causes and solutions for two common record-player problems. (1) Howling or ringing noise in the music. (2) Groove skipping and/or warped records. Convert an inexpensive child's phonograph into a compact portable stereo player. Est. cost: $22. Upgrade a child's phonograph turntable through the addition of three solid-state modules, amplifier, power supply, and rectifier/filter module. Est. cost: $11. Convert a child's phonograph into a portable stereo phonograph. Est. cost: $22. Tips on a system suitable for playing old 78 RPM phono records. | |||||||||
Copyright © by Norman Lathrop Enterprises. All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means (electronic, mechanical, print photocopying, recording or otherwise) without the prior expressed permission of Norman Lathrop Enterprises, except as permitted by law. |
|||||||||