Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION.
Click on a see also (sa) or tracing (xx) to view detailed entries about a related subject.
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.

Micro-sized amplifier built using surface-mount technology. Est. cost: $20. Use the amp for both a (1) Big-Ear parabolic-reflector microphone and a (2) super-snooper which is built into a headphone-style radio headset.
ELECTRONICS EXPERIMENTERS HANDBOOK 1990 pg. 103, 129

Laser listener. How to use a lightbeam to eavesdrop on conversations taking place behind windows. How glass vibrations can be converted to sound.
ELECTRONICS EXPERIMENTERS HANDBOOK 1990 pg. 107

A novel super-directional horn microphone that outperforms many costly commercial designs. Used to capture and listen to sounds at a distance. Consists of a corrugated cardboard horn attached to an ordinary hand-held microphone.
ELECTRONICS EXPERIMENTERS HANDBOOK 1992 pg. 101

Bionic ears. Outfit stereo headphones with a pair of precision solar reflectors (fitted with mini electret-mike elements at their focal point) and a battery-powered stereo amplifier.
ELECTRONICS HOBBYISTS HANDBOOK 1989 pg. 11

Laser experiments. (1) Optical seismometer. Includes instructions for a photographic recorder which makes a permanent record of earth movements over a 24-hour period. (2) Laser listening device. Modulated laser light is picked up by a simple parabolic detector.
ELECTRONICS NOW Jul 1996 (v.67#7) pg. 62

Bionic ears. Stereo headphones are equipped with two small parabolic reflectors which direct sound into electret mikes. The sound is amplified and delivered to the earphones. It looks strange, but lets you hear quiet or far-off sounds in stereo.
HANDS-ON ELECTRONICS Dec 1987 (v.4#12) pg. 29

Build the "Tube", a super-sensitive, long-range listening device that uses a 42" piece of 4"-diameter PVC sewer pipe as the sound-directing and gathering instrument. Est. cost: $40.
HANDS-ON ELECTRONICS Jan 1988 (v.5#1) pg. 79
Correction HANDS-ON ELECTRONICS Jul 1988 (v.5#7) pg. 6
Added Info HANDS-ON ELECTRONICS Sep 1988 (v.5#9) pg. 4

Build the electronic "bug" swatter. RF sniffer can locate minuscule RF signals from just about any source, including eavesdropping devices, leaky microwave ovens, RF interference, etc.
HANDS-ON ELECTRONICS Aug 1988 (v.5#8) pg. 75
Correction HANDS-ON ELECTRONICS Jan 1989 (v.6#1) pg. 4

Laser eavesdropping. Intercepting conversations inside a closed room by detecting and demodulating a laser beam reflected from a window pane.
MODERN ELECTRONICS [2] Nov 1987 (v.4#11) pg. 74

Uncle Harry's secret guide to do-it-yourself bugs. An overview of low-cost electronic surveillance equipment. Includes tips on avoiding bugging.
POPULAR COMMUNICATIONS Jan 1989 (v.7#5) pg. 16

You're under surveillance. Listing of frequency bands authorized by FCC for bumper-beeper tailing transmitters. Also looks at available surveillance transmitters.
POPULAR COMMUNICATIONS Jul 1989 (v.7#11) pg. 8

Bug Tracer circuit can be used to ferret out eavesdropping devices and trace the connecting wires back to the source, by detecting RF emissions.
POPULAR ELECTRONICS [2] Mar 1989 (v.6#3) pg. 82

Build this remote telephone ear. Lets you monitor sounds in your home or office when you call your telephone from a remote location.
RADIO-ELECTRONICS Dec 1978 (v.49#12) pg. 67

Build this laser listener to eavesdrop on a window from across the street. Use conversation-induced vibrations of a window pane to modulate a laser beam.
RADIO-ELECTRONICS Oct 1987 (v.58#10) pg. 39
Added Info RADIO-ELECTRONICS Nov 1987 (v.58#11) pg. 8

Micro-sized amplifier can be built using either SMD (surface-mount devices) or conventional components. SMD version fits on PC board under 1"x1". Use it for both a home-brewed "Big-Ear" type microphone and a super snooper. Est. cost: $20.
RADIO-ELECTRONICS Aug 1988 (v.59#8) pg. 33, 67

Tracking down RF bugging devices using a spectrum analyzer.
RADIO-ELECTRONICS Jun 1989 (v.60#6) pg. 33

Build a "bug detector", a radio-frequency detector that can locate low-power (1-mW) transmitters at a distance up to 20 feet. Est. cost: $60.
RADIO-ELECTRONICS Jun 1989 (v.60#6) pg. 42

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