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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.


Patch plug pleasure. A patch panel features two rows of 1/4" plugs which correspond to the inputs and outputs of all audio your equipment.
AUDIO AMATEUR 3/1970 [Summer 1970] (v.1#3) pg. 8
Correction AUDIO AMATEUR 4/1970 [Fall 1970] (v.1#4) pg. 18

Two tape monitor circuits. (1) Uses a multiple station, interlock, pushbutton switch. (2) Combines a program selector switch with a tape monitor circuit.
AUDIO AMATEUR 2/1971 [Nov 1971] (v.2#2) pg. 16

Switchbox consists of twelve rear panel jacks. This provides both in and out stereo signals for preamp and two tape recorders (reel and cassette).
AUDIO AMATEUR 1/1972 [Oct 1972] (v.3#1) pg. 27

How to hook-up several Dolby sources through your preamp or receiver and still obtain full monitor functions of the tape recorder. Switches are used to select mode (record or play) and the input source.
AUDIO AMATEUR 2/1973 [Apr 1974] (v.4#2) pg. 20

An IC preamp/console. Part 1. How an audio console functions as the collector, processor and distributor of all sound sources within your system (phonos, tapes, tuners, oscillators, synthesizers, etc.).
AUDIO AMATEUR 2/1974 [Dec 1974] (v.5#2) pg. 4

Design your own switch-and-jack panel. It is built around ordinary 1/4" phone jacks and is better suited to frequent cable changes than the phono connector.
AUDIO AMATEUR 3/1974 [Feb 1975] (v.5#3) pg. 4
Added Info AUDIO AMATEUR 1/1975 [Jun 1975] (v.6#1) pg. 40
Added Info AUDIO AMATEUR 1/1976 [May 1976] (v.7#1) pg. 43

An IC preamp/console. Part 2. Planning your own console. Circuits for the various subsystems (mixer, cue, monitor, preamps, etc.).
AUDIO AMATEUR 3/1974 [Feb 1975] (v.5#3) pg. 9
Added Info AUDIO AMATEUR 3/1977 [Aug 1977] (v.8#3) pg. 52

An IC preamp/console. Part 3. Operation manual
AUDIO AMATEUR 4/1974 [Apr 1975] (v.5#4) pg. 22

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

Two out of one. Master switching center to control all the inputs of a stereo system and direct the output to three pairs of speakers in different rooms. Each speaker pair is equipped with its own volume control.
AUDIO AMATEUR 3/1975 [Jan 1976] (v.6#3) pg. 18

Switch box manipulates input and output to and from tape recorders, tuner, equalizer, etc.
AUDIO AMATEUR 3/1975 [Jan 1976] (v.6#3) pg. 26

Two simple switching circuits for using two tape decks. Both circuits allow dubbing from either deck to the other and a choice of monitoring.
AUDIO AMATEUR 4/1977 [Dec 1977] (v.8#4) pg. 44

An audio activated power switch. A device to switch on the "mains" (electric power) to an audio power amplifier whenever an audio signal appears on the input of the amplifier. When the audio signal is removed the device switches the mains off again after a predetermined time (2-6 minutes).
AUDIO AMATEUR 3/1978 [Sep 1978] (v.9#3) pg. 16
Added Info AUDIO AMATEUR 3/1980 [Jun 1980] (v.11#3) pg. 54

The AB box. A switch box facilitates performing listening evaluations of high level sources, phone preamps, speakers, etc.
AUDIO AMATEUR 2/1979 [Apr 1979] (v.10#2) pg. 30

Handy switch box is a modification of the DB Systems unit (4 shielded inputs, 4 grounding posts, and 2 outputs).
AUDIO AMATEUR 2/1981 [Apr 1981] (v.12#2) pg. 48

Tip on rewiring a preamp's switching facilities to reduce the number of switch contacts in the signal path.
AUDIO AMATEUR 4/1981 [Sep 1981] (v.12#4) pg. 38

Build Hafler's XL-10 A/B/D distortion test box. A convenient switchbox which makes use of the Hafler Excelinear technique as an aid to evaluating the accuracy of an amplifier through listening tests.
AUDIO AMATEUR 4/1987 [Nov 1987] (v.18#4) pg. 27

Tip on constructing a passive volume control starting with the DB Systems switchbox.
AUDIO AMATEUR 2/1988 [May 1988] (v.19#2) pg. 42

Switchless audio switch. Electronic function switching uses touch switches. Can be adapted to remote control.
AUDIO AMATEUR 3/1988 [Aug 1988] (v.19#3) pg. 7

Advice on using mercury-wetted reed relays for low-level audio switching.
AUDIO AMATEUR 4/1995 [Nov 1995] (v.26#4) pg. 50

A trial-balloon passive control. Construction of a simple passive preamplifier (audio switch) which eliminates the power-line noise found in an active preamplifier.
AUDIO ELECTRONICS 2/1998 [Apr 1998] (v.29#2) pg. 12

Optimizing the S/PDIF (Sony/Philips Digital Interface). Hidden hazards and hook-up hints when using cables, connectors, and input switching for digital audio.
AUDIO ELECTRONICS 4/1998 [Aug 1998] (v.29#4) pg. 16
Added Info AUDIO ELECTRONICS 1/1999 [Jan 1999] (v.30#1) pg. 44, 51
Added Info AUDIO ELECTRONICS 2/1999 [Mar 1999] (v.30#2) pg. 46
Added Info AUDIO ELECTRONICS 4/1999 [Aug 1999] (v.30#4) pg. 46

Audio delay circuit that originally appeared in Popular Electronics is modified for control by an 8-bit parallel port. Demonstrates how to attach a computer to any circuit that normally uses mechanical switches.
BYTE Nov 1981 (v.6#11) pg. 364

Audio switcher lets you choose between eight-different stereo-audio input sources, and feed the selected signal to one pair of stereo inputs on an amplifier.

Whole-house audio wiring system. Uses a keyboard to direct 8 stereo inputs to 4 audio outputs. Part 1. Overview of organization.
ELECTRONICS NOW Mar 1995 (v.66#3) pg. 86

Whole-house audio wiring system. Part 2. Keyboard.
ELECTRONICS NOW Jun 1995 (v.66#6) pg. 82

Whole-house audio wiring system. Part 3. Circuit that will assign switch selection to one of four outputs.
ELECTRONICS NOW Jul 1995 (v.66#7) pg. 82

Whole-house audio wiring system. Part 4. PC circuit board layout.
ELECTRONICS NOW Aug 1995 (v.66#8) pg. 86

Using FETs as audio switches.
ELECTRONICS WORLD Aug 1970 (v.84#2) pg. 46

5x5 Audio Switch Box. Switch the connections between audio components without touching a single wire with this homebrew accessory. Handles 5 inputs/outputs in any combination. Built-in headphone amplifier allows you to monitor any of the outputs.
HANDS-ON ELECTRONICS Feb 1988 (v.5#2) pg. 43

Diode switching circuits to switch audio from one point to another.
HANDS-ON ELECTRONICS Aug 1988 (v.5#8) pg. 94

Audio, video additions. Tips on selecting and installing a switch box to provide additional jacks and equipment combinations for your audio/video system.
HOME MECHANIX #744 Apr 1990 (v.86) pg. 22

A signal-processor patch box (switching facility) allows easy rearrangement of outboard audio gear.
POPULAR ELECTRONICS [1] Aug 1981 (v.19#8) pg. 60

Build a stereo component switchbox. Matrix switchbox allows you to add or delete components without rewiring. Est. cost: $95 (for a 6x6 matrix unit).
POPULAR ELECTRONICS [1] Feb 1982 (v.20#2) pg. 52

Video/audio switcher. Build this baseband-signal switcher to preserve the clarity lost to modulation/demodulation schemes. Provides 75-ohm buffered, video-input/output ports, stereo-compatible buffered I/O's, and tape-monitoring capabilities.
POPULAR ELECTRONICS [2] Dec 1989 (v.6#12) pg. 29

Build an eight-channel audio switcher that provides more inputs to your audio amplifier for auxiliary equipment.
POPULAR ELECTRONICS [2] Dec 1992 (v.9#12) pg. 31

Build a surround-sound switchbox. Control where your home-theater or stereo system's audio is coming from and add surround sound with this handy device. Uses a passive circuit to create the Hafler effect using existing sum and difference signals. Est. cost: $20.
POPULAR ELECTRONICS [2] Nov 1996 (v.13#11) pg. 52

Circuit to mute a stereo sound system whenever the telephone rings or the doorbell is activated.
POPULAR ELECTRONICS [2] Jul 1997 (v.14#7) pg. 67

Whole-house audio. How to rig up a speaker-selection box that works with X-10 remote control . Audio output can be directed to either zone 1 or zone 2 stereo speakers using X-10 signals. Est. cost: $66.
POPULAR HOME AUTOMATION May 1997 (v.2#2) pg. 10

Audio/video switcher. Eliminate the mess and confusion of wires that lurk behind your audio and video equipment with this easy to build 4x1 switcher.
RADIO-ELECTRONICS Feb 1988 (v.59#2) pg. 65, 71
Correction RADIO-ELECTRONICS Apr 1988 (v.59#4) pg. 14

Triple audiovisual switcher circuit uses one IC to simultaneously select video and two-channel stereo audio from any one of three sources and then route them to one of two selected outputs.
RADIO-ELECTRONICS Dec 1990 (v.61#12) pg. 72

Tip on doing more valid "blind" A/B audio tests by using an add-on infrared remote control to switch between the items under test.
SPEAKER BUILDER 3/1988 [May 1988] (v.9#3) pg. 47