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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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AUDIO TAPE RECORDER sa CASSETTE TAPE RECORDER sa VIDEO CASSETTE RECORDER x MAGNETIC TAPE RECORDER x TAPE RECORDER (AUDIO) xx AUDIO EQUIPMENT xx AUDIO RECORDING xx AUDIO TAPE xx ELECTRONICS A low noise tape playback preamplifier. Circuitry on a plug-in board is adaptable to both a high-quality tape copier and a four channel player. A dubbing deck. Construct a second machine for copying an audio tape using an inexpensive deck and heads combined with a pair of preamplifiers. Tip on replacing the playback electronics in an EICO RP100 tape deck with Williamson's electronics. Tip on replacing the drive belt in an EICO RP-100. Adding a lamp to an Ampex 750-series tape machine to clearly indicate when it is in the record mode. Building a 10.5" reel-to-reel tape deck. Troubleshooting an Allied TD-1095 tape deck to remove electronic "hiss" in the record amplifiers. Tip on modifying the Tandberg 3000 and 6000 mechanical tape deck to increase drive reliability. Troubleshooting a TEAC A-1200U tape deck. (1) Reducing channel noise. (2) Flattening the rubber pinch roller. Double dub and fader. This unit lets you (1) transfer from one tape recorder to another while monitoring either recorder, (2) master fade both channels during the transfer process, or (3) record FM/stereo or phone on either recorder while monitoring. Tip on making a temporary phono or tape drive belt from sewing elastic. Tip on covering the record head to protect it from needless wear when a tape recorder is used mostly for playing tapes. A-Z tape recorder set-up. How to clean and adjust your tape recorder so that it performs up to its original specifications. Part 1. Mechanical adjustments for the tape heads. A-Z tape recorder set-up. Part 2. Locating and adjusting internal controls. Ambience, Blumlein, and the Super Quadpod. Exploring early stereo recording techniques using two full L and R stereo processing units. (1) Permits conversion of either direct derived L+R and L-R "Middle-Side" recordings into L and R channels. (2) Permits conversion of conventional L and R signals into L+R and L-R and back again. Super buff. This tape monitor buffer is used to mate hostile impedances and keep distortion from leaking into your tape output. Tip on overcoming capstan motor "ringing" or "whistling" in a ReVox A-77 tape recorder. Tips on modifying TEAC 4010S open reel decks. Greening of the ReVox A-77. Mechanical and circuit modifications make this tape deck more suitable for recording live music. Tape head restoration involves filing and polishing. Tandberg 3000 tape deck drive system maintenance tips. Tips on repairing and upgrading a Braun TG-1000 open reel deck. The tape-tweaker's pal. Instrument for aligning a tape recorder has three sections (variable-frequency oscillator, spot-frequency oscillator, and a spot THD analyzer). Also useful for checking frequency response and midband distortion on any piece of audio gear. Part 1. Low cost circuit provides variable speed operation for audio tape decks having AC induction motors. The tape-tweaker's Pal. Part 2. Performance specs, an essay on tweaking, and construction details. An audio measuring system. Part 4. The ramp recording modem. Allows you to make frequency response sweeps with the "Sorcerer's Apprentice" signal generator and "Paul Bunyan" logger on any tape recorder with more than one channel. Correct head loading resistor values for the ReVox B77 or PR99 reel-to-reel tape deck. A peak program meter for the ReVox A-77 open-reel tape recorder to replace the VU meter. Troubleshooting switches on Pioneer RT909 reel-to-reel tape deck. Reverser. A circuit to facilitate correcting stereo tapes with reversed channels, out-of-phase channels, and M-S (middle-side) stereo encoding. Also useful for adding a little gain and mixing stereo down to mono. Two-timer. Simple modification for a Sony TC-766-2 tape deck lets you measure tape movement in real time (minutes and seconds). An inexpensive Commodore VIC-20 computer is used to count revolutions of an idler roller and convert this information to real time. Classic circuitry. Schematic for Revox stereo tape recorder (circa 1965). 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. High quality (semi-professional) analog and digital recording equipment for the amateur. What is available. Tips on doing a head alignment on a reel-to-reel tape recorder. Tips on how to give a tape recorder a routine checkup and maintenance. Tips for buying a tape deck. BASIC program to convert (correlate) the turn-counter readings of an instrumentation tape recorder into elapsed time, remaining time, footage used, and footage remaining. Auto slide programmer for tape recorder. Preamp for a tape recorder. Load box signal control for taping from radio or other amplifier. Tips on maintaining a tape recorder's heads. Plug-in preamplifier for cheap tape recorders. Est. cost: $6. Plug-in recording level meter for budget recorders. Est. cost: $3. Tape compressor. A device which will automatically adjust recording sensitivity to correctly record loud or soft noises at the same sound level. Also useful to maintain constant amplitude with CB or ham radio transmission. Automatic shut off for tape recorder if tape ends or breaks. Overhauling a tape recorder using a VTVM and an audio generator. Add a monitor head to your recorder. A second tape recorder head mounted after the first head allows you to hear what has just been recorded. Useful for checking quality of recording. Combination phonograph and tape deck preamp will produce about 40 dB of gain. Est. cost: $7. Build a Plexiglas dust cover for a tape recorder. Upgrade the "Play Tape" tape recorder to improve fidelity and so it can play through a hi-fi system. Tape head analyst. A battery-operated audio generator and high-impedance AC voltmeter used to align tape recorder heads. Wireless tape-recording system uses an FM radio, an FM wireless mike, a tape recorder and the control described in this article. Controller turns recorder on when mike is on and off when mike is off. Build a direct-reading wow and flutter meter. Used to measure distortion caused by out-of-round phonograph or tape player components. Part 1. Build a direct-reading wow and flutter meter. Part 2. Restoring an open-reel audio tape recorder. Part 1. Issues to consider before starting on a vintage device. Restoring an open-reel audio tape recorder. Part 2. Cleaning, lubrication, electronics check, etc. Restoring an open-reel audio tape recorder. Part 3. Reel tensions, rollers, tape path alignment, electronic adjustments, etc. Changing bias current to improve distortion, output level and recording. Preventive maintenance for tape recorders. Regular cleaning and lubricating. A review of tape recorder accessories which make recordings more enjoyable. A look at head degaussres, tape erasers and head cleaners among others. Circuit for an equalized tape head preamplifier uses the type 741 opamp. Bargain priced tape decks can be made operational with these electronics. The tape speed in some low cost portable tape players can be varied by a change in voltage to the DC motors. Use this fact to experiment with sounds or to save old tapes that were recorded on tapes at irregular rates of speed. Greening (troubleshooting) the Revox G36 open-reel stereo tape recorder (circa 1964-1967). Boom-box players. Maintenance tips for portable tape players and radios. Unlock the mystery of voice/remote activation circuits. Expand the usefulness of portable cassette recorders with these circuits. (1) Extended-play circuit slows down the rate of tape travel. (2) Sound-activated tape switch starts recorder when sound is detected. (3) Telephone auto-record circuit records telephone calls coming in and going out from the same phone line. Automatic fader circuit drops the level of background music as tape-recorded slide-show narration comes up. 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. Plexiglas cube tables and a tape recorder dust cover. How to cut, finish edges, drill, break, heat form and join Plexiglas. Eight-track recorders usually use light bulbs to indicate which track (1,2,3,4) the unit is on. This circuit will use a single LED readout to flash the number 1,2,3, or 4. Est. cost: $4. Stereo tape deck performance specs. How tape recorder performance specifications are determined by using recognized measurement standards. Repeating tape recorder can serve as a family message center. Rack holds tape recorder at an angle for better viewing of dials, controls, tape, etc. Switch on microphone to shut off recorder. Pin point those erase troubles. Hints on correcting some obvious tape recorder troubles. Echo chamber for an inexpensive tape recorder. Est. cost: $10. Multipurpose FET signal tracer. Can be used as a millivoltmeter, output meter, microphone preamplifier, auxiliary audio amplifier, tape recorder monitor, etc., as well as a sensitive signal tracer. Distortionless speech compressor will automatically maintain the correct recording level for a tape recorder. Est. cost: $16. Relay turns on a tape recorder motor whenever the signal being monitored is being received. Audio multicoupler to isolate multiple tape recorder inputs and minimize loading. Electronic circuit to turn recorder off at the end of a reel. Setting up and adjusting a tape recorder for best performance. How to select a reel-to-reel tape recorder. Which reel-to-reel tape to use. Results of laboratory tests. How to make very precise adjustments to match your tape recorder to the tape you will be using. A service manual and some test equipment will enable you to make adjustments as close to plus or minus zero dB as possible. How to evaluate tape recorder specifications. Tape head alignment. How to tell when your stereo tape heads need to be aligned and some simple adjustments you can do yourself. 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. What's new in tape recorders. Overview of recent developments in tape decks and formats. Build this 35mm slide syncer. Advance your slides using a signal from a tape recorder which also contains the dialog and/or background music for a slide show. This device plugs between the recorder and the projector. How to maintain tape recorders and tapes in peak condition. Some tips. 8-track timer provides a visual indication of the amount of time used to record on one track and then keeps track of the time remaining on each track as recording continues. Enables you to keep track of the end-of-track or end-of-tape and plan your recording ahead. How to adjust your tape recorder for optimum bias. Circuit to match the unbalanced output of a tape deck, microphone, etc., to the input of a balanced system. 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. Tester to check tape recorder heads. Transistorized recorder can serve as a dictating machine. Adapter allows a 3" reel recorder to play 7" reels. Twenty ways to get more use out of your tape recorder. Includes using it as a teaching machine, making sound albums, preserving recipes, etc. How to maintain a tape recorder. Tips on recording your own 8-track cartridges, plus a look at commercially available 8-track decks. How to repair and maintain a cassette tape recorder. How to buy a tape recorder. Tips on selecting the best audio tape system for you. A comparison of reel, cassette and cartridge systems. How to multiply sound with a tape recorder. How to convert a two-channel tape player to a 4-channel stereo that can continue to be used for 2-channel tapes as well. How to use a wireless FM mike for remote tape recordings. Special microphone incorporates an audio compressor and VOX circuit. It will turn on your recorder at the sound of a voice and keep the recording level automatically adjusted. Add sound to your home movies. How to interface a stereo tape recorder to a movie camera and movie projector to produce a synchronized sound track. Est. cost: $75. How to tune up your tape recorder for best performance. Voice-operated switch (VOX) for your tape recorder. Universal tape-slide synchronizer. Solid-state, electromechanical device which automatically actuates a slide-changer mechanism on receiving a signal from a stereo tape recorder. Est. cost: $14. The addition of a portable tape recorder to your auto can be useful for dictating letters or thoughts while driving. Clean and adjust your recorder. Directional microphone for recording bird songs and insect noises on a battery-powered tape recorder. The addition of an electronic trigger will automatically turn the recorder on and off in response to sounds. Analysis of the recorded noise is assisted by graphing the noise on an electrocardiograph. | |||||||||
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. |
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