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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION.
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The entries are in alphabetical order by magazine name and then in chronological sequence.
To obtain a copy of any magazine article contact your local public library or the publisher.


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.
AUDIO AMATEUR 3/1970 [Summer 1970] (v.1#3) pg. 5
Correction AUDIO AMATEUR 4/1970 [Fall 1970] (v.1#4) pg. 18
Correction AUDIO AMATEUR 2/1972 [Jan 1973] (v.3#2) pg. 21

A dubbing deck. Construct a second machine for copying an audio tape using an inexpensive deck and heads combined with a pair of preamplifiers.
AUDIO AMATEUR 4/1970 [Fall 1970] (v.1#4) pg. 14

Tip on replacing the playback electronics in an EICO RP100 tape deck with Williamson's electronics.
AUDIO AMATEUR 2/1971 [Nov 1971] (v.2#2) pg. 16

Tip on replacing the drive belt in an EICO RP-100.
AUDIO AMATEUR 4/1971 [Jul 1972] (v.2#4) pg. 22

Adding a lamp to an Ampex 750-series tape machine to clearly indicate when it is in the record mode.
AUDIO AMATEUR 1/1972 [Oct 1972] (v.3#1) pg. 26

Building a 10.5" reel-to-reel tape deck.
AUDIO AMATEUR 2/1972 [Jan 1973] (v.3#2) pg. 3

Troubleshooting an Allied TD-1095 tape deck to remove electronic "hiss" in the record amplifiers.
AUDIO AMATEUR 1/1973 [Dec 1973] (v.4#1) pg. 16

Tip on modifying the Tandberg 3000 and 6000 mechanical tape deck to increase drive reliability.
AUDIO AMATEUR 4/1973 [Aug 1974] (v.4#4) pg. 18

Troubleshooting a TEAC A-1200U tape deck. (1) Reducing channel noise. (2) Flattening the rubber pinch roller.
AUDIO AMATEUR 2/1974 [Dec 1974] (v.5#2) pg. 16

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.
AUDIO AMATEUR 1/1975 [Jun 1975] (v.6#1) pg. 28

Tip on making a temporary phono or tape drive belt from sewing elastic.
AUDIO AMATEUR 4/1975 [Mar 1976] (v.6#4) pg. 41

Tip on covering the record head to protect it from needless wear when a tape recorder is used mostly for playing tapes.
AUDIO AMATEUR 1/1976 [May 1976] (v.7#1) pg. 22

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.
AUDIO AMATEUR 3/1976 [Oct 1976] (v.7#3) pg. 6
Added Info AUDIO AMATEUR 2/1977 [May 1977] (v.8#2) pg. 69, 71

A-Z tape recorder set-up. Part 2. Locating and adjusting internal controls.
AUDIO AMATEUR 4/1976 [Dec 1976] (v.7#4) pg. 16
Added Info AUDIO AMATEUR 1/1977 [Feb 1977] (v.8#1) pg. 53
Added Info AUDIO AMATEUR 2/1977 [May 1977] (v.8#2) pg. 70
Added Info AUDIO AMATEUR 4/1977 [Dec 1977] (v.8#4) pg. 52

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.
AUDIO AMATEUR 1/1977 [Feb 1977] (v.8#1) pg. 14
Correction AUDIO AMATEUR 2/1977 [May 1977] (v.8#2) pg. 69
Added Info AUDIO AMATEUR 3/1977 [Aug 1977] (v.8#3) pg. 55

Super buff. This tape monitor buffer is used to mate hostile impedances and keep distortion from leaking into your tape output.
AUDIO AMATEUR 4/1977 [Dec 1977] (v.8#4) pg. 18
Correction AUDIO AMATEUR 3/1978 [Sep 1978] (v.9#3) pg. 56
Added Info AUDIO AMATEUR 4/1983 [Nov 1983] (v.14#4) pg. 30

Tip on overcoming capstan motor "ringing" or "whistling" in a ReVox A-77 tape recorder.
AUDIO AMATEUR 1/1981 [Feb 1981] (v.12#1) pg. 47

Tips on modifying TEAC 4010S open reel decks.
AUDIO AMATEUR 2/1981 [Apr 1981] (v.12#2) pg. 60

Greening of the ReVox A-77. Mechanical and circuit modifications make this tape deck more suitable for recording live music.
AUDIO AMATEUR 4/1981 [Sep 1981] (v.12#4) pg. 28
Correction AUDIO AMATEUR 1/1982 [Jan 1982] (v.13#1) pg. 52
Added Info AUDIO AMATEUR 1/1982 [Jan 1982] (v.13#1) pg. 53, 59, 60
Added Info AUDIO AMATEUR 2/1982 [May 1982] (v.13#2) pg. 54
Added Info AUDIO AMATEUR 3/1983 [Sep 1983] (v.14#3) pg. 56
Added Info AUDIO AMATEUR 4/1983 [Nov 1983] (v.14#4) pg. 54
Added Info AUDIO AMATEUR 1/1984 [Mar 1984] (v.15#1) pg. 54

Tape head restoration involves filing and polishing.
AUDIO AMATEUR 4/1981 [Sep 1981] (v.12#4) pg. 39

Tandberg 3000 tape deck drive system maintenance tips.
AUDIO AMATEUR 1/1982 [Jan 1982] (v.13#1) pg. 32

Tips on repairing and upgrading a Braun TG-1000 open reel deck.
AUDIO AMATEUR 3/1982 [Aug 1982] (v.13#3) pg. 38

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.
AUDIO AMATEUR 5/1982 [Jan 1983] (v.13#5) pg. 13

Low cost circuit provides variable speed operation for audio tape decks having AC induction motors.
AUDIO AMATEUR 5/1982 [Jan 1983] (v.13#5) pg. 43
Correction AUDIO AMATEUR 1/1983 [Apr 1983] (v.14#1) pg. 54

The tape-tweaker's Pal. Part 2. Performance specs, an essay on tweaking, and construction details.
AUDIO AMATEUR 1/1983 [Apr 1983] (v.14#1) pg. 24
Added Info AUDIO AMATEUR 4/1983 [Nov 1983] (v.14#4) pg. 55

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.
AUDIO AMATEUR 4/1983 [Nov 1983] (v.14#4) pg. 18

Correct head loading resistor values for the ReVox B77 or PR99 reel-to-reel tape deck.
AUDIO AMATEUR 4/1983 [Nov 1983] (v.14#4) pg. 29

A peak program meter for the ReVox A-77 open-reel tape recorder to replace the VU meter.
AUDIO AMATEUR 1/1984 [Mar 1984] (v.15#1) pg. 19

Troubleshooting switches on Pioneer RT909 reel-to-reel tape deck.
AUDIO AMATEUR 3/1984 [Jul 1984] (v.15#3) pg. 42

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.
AUDIO AMATEUR 3/1987 [Jul 1987] (v.18#3) pg. 39

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.
AUDIO AMATEUR 3/1988 [Aug 1988] (v.19#3) pg. 16

Classic circuitry. Schematic for Revox stereo tape recorder (circa 1965).
AUDIO AMATEUR 3/1988 [Aug 1988] (v.19#3) pg. 45

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.
AUDIO AMATEUR 4/1988 [Oct 1988] (v.19#4) pg. 29
Correction AUDIO AMATEUR 1/1990 [Feb 1990] (v.21#1) pg. 61
Added Info AUDIO AMATEUR 4/1990 [Oct 1990] (v.21#4) pg. 60

High quality (semi-professional) analog and digital recording equipment for the amateur. What is available.
AUDIO AMATEUR 4/1990 [Oct 1990] (v.21#4) pg. 49

Tips on doing a head alignment on a reel-to-reel tape recorder.
AUDIO AMATEUR 4/1992 [Dec 1992] (v.23#4) pg. 34

Tips on how to give a tape recorder a routine checkup and maintenance.
BOYS' LIFE Dec 1976 (v.66#12) pg. 52

Tips for buying a tape deck.
BOYS' LIFE Jun 1980 (v.70#6) pg. 14

BASIC program to convert (correlate) the turn-counter readings of an instrumentation tape recorder into elapsed time, remaining time, footage used, and footage remaining.
BYTE Sep 1980 (v.5#9) pg. 66

Auto slide programmer for tape recorder.
ELECTRONICS ILLUSTRATED Jul 1963 (v.6#4) pg. 72

Preamp for a tape recorder.
ELECTRONICS ILLUSTRATED Jan 1964 (v.7#1) pg. 90

Load box signal control for taping from radio or other amplifier.
ELECTRONICS ILLUSTRATED May 1964 (v.7#3) pg. 88

Tips on maintaining a tape recorder's heads.
ELECTRONICS ILLUSTRATED May 1965 (v.8#3) pg. 108

Plug-in preamplifier for cheap tape recorders. Est. cost: $6.
ELECTRONICS ILLUSTRATED Sep 1965 (v.8#5) pg. 41

Plug-in recording level meter for budget recorders. Est. cost: $3.
ELECTRONICS ILLUSTRATED Nov 1965 (v.8#6) pg. 86

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.
ELECTRONICS ILLUSTRATED Jul 1966 (v.9#4) pg. 57

Automatic shut off for tape recorder if tape ends or breaks.
ELECTRONICS ILLUSTRATED Sep 1966 (v.9#5) pg. 88

Overhauling a tape recorder using a VTVM and an audio generator.
ELECTRONICS ILLUSTRATED Nov 1966 (v.9#6) pg. 97

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.
ELECTRONICS ILLUSTRATED May 1967 (v.10#3) pg. 114

Combination phonograph and tape deck preamp will produce about 40 dB of gain. Est. cost: $7.
ELECTRONICS ILLUSTRATED Jul 1968 (v.11#4) pg. 38

Build a Plexiglas dust cover for a tape recorder.
ELECTRONICS ILLUSTRATED Sep 1968 (v.11#5) pg. 32

Upgrade the "Play Tape" tape recorder to improve fidelity and so it can play through a hi-fi system.
ELECTRONICS ILLUSTRATED Jan 1969 (v.12#1) pg. 100

Tape head analyst. A battery-operated audio generator and high-impedance AC voltmeter used to align tape recorder heads.
ELECTRONICS ILLUSTRATED Jul 1969 (v.12#4) pg. 55

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.
ELECTRONICS ILLUSTRATED Nov 1970 (v.13#6) pg. 84

Build a direct-reading wow and flutter meter. Used to measure distortion caused by out-of-round phonograph or tape player components. Part 1.
ELECTRONICS ILLUSTRATED Jul 1972 (v.15#4) pg. 46

Build a direct-reading wow and flutter meter. Part 2.
ELECTRONICS ILLUSTRATED Sep 1972 (v.15#5) pg. 42

Restoring an open-reel audio tape recorder. Part 1. Issues to consider before starting on a vintage device.
ELECTRONICS NOW Feb 1998 (v.69#2) pg. 46

Restoring an open-reel audio tape recorder. Part 2. Cleaning, lubrication, electronics check, etc.
ELECTRONICS NOW Mar 1998 (v.69#3) pg. 51

Restoring an open-reel audio tape recorder. Part 3. Reel tensions, rollers, tape path alignment, electronic adjustments, etc.
ELECTRONICS NOW Apr 1998 (v.69#4) pg. 52

Changing bias current to improve distortion, output level and recording.
ELEMENTARY ELECTRONICS Mar-Apr 1966 (v.2#1) pg. 41

Preventive maintenance for tape recorders. Regular cleaning and lubricating.
ELEMENTARY ELECTRONICS Nov-Dec 1966 (v.3#2) pg. 104

A review of tape recorder accessories which make recordings more enjoyable. A look at head degaussres, tape erasers and head cleaners among others.
ELEMENTARY ELECTRONICS Sep-Oct 1973 (v.13#5) pg. 43

Circuit for an equalized tape head preamplifier uses the type 741 opamp. Bargain priced tape decks can be made operational with these electronics.
ELEMENTARY ELECTRONICS May-Jun 1975 (v.15#3) pg. 84

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.
ELEMENTARY ELECTRONICS Jul-Aug 1979 (v.19#4) pg. 73

Greening (troubleshooting) the Revox G36 open-reel stereo tape recorder (circa 1964-1967).
GLASS AUDIO 0/1988 (v.1) pg. 16
Added Info GLASS AUDIO 1/1991 (v.3#1) pg. 61
Added Info GLASS AUDIO 2/1991 (v.3#2) pg. 51
Added Info GLASS AUDIO 1/1992 (v.4#1) pg. 38
Added Info GLASS AUDIO 3/1995 (v.7#3) pg. 63

Boom-box players. Maintenance tips for portable tape players and radios.
HANDS-ON ELECTRONICS Mar 1987 (v.4#3) pg. 61

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.
HANDS-ON ELECTRONICS Nov 1987 (v.4#11) pg. 84

Automatic fader circuit drops the level of background music as tape-recorded slide-show narration comes up.
HANDS-ON ELECTRONICS Nov 1987 (v.4#11) pg. 94

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.
HANDS-ON ELECTRONICS Oct 1988 (v.5#10) pg. 66

Plexiglas cube tables and a tape recorder dust cover. How to cut, finish edges, drill, break, heat form and join Plexiglas.
MECHANIX ILLUSTRATED #513 Feb 1971 (v.67) pg. 114

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.
MODERN ELECTRONICS [1] Jul 1978 (v.1#5) pg. 6

Stereo tape deck performance specs. How tape recorder performance specifications are determined by using recognized measurement standards.
MODERN ELECTRONICS [2] Aug 1985 (v.2#2) pg. 46

Repeating tape recorder can serve as a family message center.
POPULAR ELECTRONICS [1] Aug 1964 (v.21#2) pg. 79

Rack holds tape recorder at an angle for better viewing of dials, controls, tape, etc.
POPULAR ELECTRONICS [1] Dec 1965 (v.23#6) pg. 50

Switch on microphone to shut off recorder.
POPULAR ELECTRONICS [1] Dec 1965 (v.23#6) pg. 53

Pin point those erase troubles.
POPULAR ELECTRONICS [1] Dec 1965 (v.23#6) pg. 55

Hints on correcting some obvious tape recorder troubles.
POPULAR ELECTRONICS [1] Dec 1965 (v.23#6) pg. 57

Echo chamber for an inexpensive tape recorder. Est. cost: $10.
POPULAR ELECTRONICS [1] Aug 1966 (v.25#2) pg. 81

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.
POPULAR ELECTRONICS [1] Apr 1967 (v.26#4) pg. 43

Distortionless speech compressor will automatically maintain the correct recording level for a tape recorder. Est. cost: $16.
POPULAR ELECTRONICS [1] Feb 1968 (v.28#2) pg. 47

Relay turns on a tape recorder motor whenever the signal being monitored is being received.
POPULAR ELECTRONICS [1] May 1968 (v.28#5) pg. 89

Audio multicoupler to isolate multiple tape recorder inputs and minimize loading.
POPULAR ELECTRONICS [1] Jul 1970 (v.33#1) pg. 31

Electronic circuit to turn recorder off at the end of a reel.
POPULAR ELECTRONICS [1] Jan 1971 (v.34#1) pg. 84

Setting up and adjusting a tape recorder for best performance.
POPULAR ELECTRONICS [1] Oct 1971 (v.35#4) pg. 67

How to select a reel-to-reel tape recorder.
POPULAR ELECTRONICS [1] Mar 1972 (v.1#3) pg. 47

Which reel-to-reel tape to use. Results of laboratory tests.
POPULAR ELECTRONICS [1] Feb 1973 (v.3#2) pg. 28

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.
POPULAR ELECTRONICS [1] May 1973 (v.3#5) pg. 12

How to evaluate tape recorder specifications.
POPULAR ELECTRONICS [1] Oct 1974 (v.6#4) pg. 46

Tape head alignment. How to tell when your stereo tape heads need to be aligned and some simple adjustments you can do yourself.
POPULAR ELECTRONICS [1] Feb 1975 (v.7#2) pg. 22

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.
POPULAR ELECTRONICS [1] Sep 1976 (v.10#3) pg. 92

What's new in tape recorders. Overview of recent developments in tape decks and formats.
POPULAR ELECTRONICS [1] Oct 1976 (v.10#4) pg. 45

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.
POPULAR ELECTRONICS [1] Nov 1976 (v.10#5) pg. 74

How to maintain tape recorders and tapes in peak condition. Some tips.
POPULAR ELECTRONICS [1] Jul 1977 (v.12#1) pg. 56

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.
POPULAR ELECTRONICS [1] Jul 1979 (v.16#1) pg. 57

How to adjust your tape recorder for optimum bias.
POPULAR ELECTRONICS [1] Oct 1980 (v.18#4) pg. 65

Circuit to match the unbalanced output of a tape deck, microphone, etc., to the input of a balanced system.
POPULAR ELECTRONICS [1] Oct 1980 (v.18#4) pg. 84

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.
POPULAR ELECTRONICS [1] Apr 1981 (v.19#4) pg. 65
Added Info POPULAR ELECTRONICS [1] Aug 1981 (v.19#8) pg. 7

Tester to check tape recorder heads.
POPULAR MECHANICS Dec 1963 (v.120#6) pg. 180

Transistorized recorder can serve as a dictating machine.
POPULAR MECHANICS Oct 1964 (v.122#4) pg. 196

Adapter allows a 3" reel recorder to play 7" reels.
POPULAR MECHANICS Mar 1965 (v.123#3) pg. 192

Twenty ways to get more use out of your tape recorder. Includes using it as a teaching machine, making sound albums, preserving recipes, etc.
POPULAR MECHANICS Nov 1966 (v.126#5) pg. 197

How to maintain a tape recorder.
POPULAR MECHANICS Apr 1970 (v.133#4) pg. 160

Tips on recording your own 8-track cartridges, plus a look at commercially available 8-track decks.
POPULAR MECHANICS Mar 1972 (v.137#3) pg. 81

How to repair and maintain a cassette tape recorder.
POPULAR MECHANICS Nov 1979 (v.152#5) pg. 34

How to buy a tape recorder.
POPULAR SCIENCE Jul 1964 (v.185#1) pg. 98

Tips on selecting the best audio tape system for you. A comparison of reel, cassette and cartridge systems.
POPULAR SCIENCE Feb 1969 (v.194#2) pg. 126

How to multiply sound with a tape recorder.
POPULAR SCIENCE Feb 1970 (v.196#2) pg. 102

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.
POPULAR SCIENCE Mar 1970 (v.196#3) pg. 146

How to use a wireless FM mike for remote tape recordings.
POPULAR SCIENCE Aug 1970 (v.197#2) pg. 89

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.
POPULAR SCIENCE Oct 1973 (v.203#4) pg. 134

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.
RADIO-ELECTRONICS Aug 1977 (v.48#8) pg. 45

How to tune up your tape recorder for best performance.
RADIO-ELECTRONICS Nov 1979 (v.50#11) pg. 54

Voice-operated switch (VOX) for your tape recorder.
RADIO-ELECTRONICS Nov 1983 (v.54#11) pg. 68

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.
RADIO-TV EXPERIMENTER Feb-Mar 1967 (v.22#1) pg. 77

The addition of a portable tape recorder to your auto can be useful for dictating letters or thoughts while driving.
RADIO-TV EXPERIMENTER Oct-Nov 1968 (v.25#2) pg. 83

Clean and adjust your recorder.
SCIENCE & MECHANICS Jul 1963 (v.34#7) pg. 78

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.
SCIENTIFIC AMERICAN Feb 1974 (v.230#2) pg. 110