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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.


The F/C meter. Measure frequency (1 Hz to 100 kHz) and capacitance (5 picofarad to 1 microfarad) over five ranges. Can also provide a frequency standard or be used as an oscilloscope calibrator, squarewave signal injector, a marker for audio-sweep generators, and a non-contact tachometer. Est. cost: $25 (kit).

Probe-size signal injector. A small, 7-component signal generator with 600 cps to 30 mc signal output in a plastic toothbrush case.
ELECTRONICS ILLUSTRATED Nov 1966 (v.9#6) pg. 55

Pocket-size signal injector ("Beeper") is a simple blocking oscillator with an output above 1 KHz. Powered by a small mercury cell. Est. cost: $6.
ELEMENTARY ELECTRONICS Jul-Aug 1971 (v.11#3) pg. 45

Audio generator (injector) circuit produces a sinusoidal output of 0-to-8 volts peak-to-peak at about 500 Hz.
HANDS-ON ELECTRONICS Sep 1987 (v.4#9) pg. 97

Signal injector circuit can put out signals from about 2 kHz up to the RF broadcast band range. Output levels can vary from a few millivolts up to eight volts peak-to-peak.
HANDS-ON ELECTRONICS Feb 1988 (v.5#2) pg. 84

Signal injector circuit built around the 555 timer IC. Output frequency can be varied from 50 Hz to 15 kHz.
HANDS-ON ELECTRONICS Dec 1988 (v.5#12) pg. 26

Circuit for a signal injector for putting an i-f or rf signal into a circuit at any point you choose.
MODERN ELECTRONICS [1] Feb 1978 (v.1#1) pg. 73

Signal injector circuit for testing both audio amplifiers and radio circuits.
POPULAR ELECTRONICS [1] Nov 1964 (v.21#5) pg. 88

Schematic of a general purpose signal injector circuit using two transistors.
POPULAR ELECTRONICS [1] Dec 1965 (v.23#6) pg. 76

Signal injector. Quick way to check audio circuits. Basically, it's a 1000 Hz multivibrator that generates square waves. Est. cost: $8.
POPULAR ELECTRONICS [1] Jun 1970 (v.32#6) pg. 43
Correction POPULAR ELECTRONICS [1] Sep 1970 (v.33#3) pg. 116

Signal injector is comprised of a simple oscillator circuit with 100% negative feedback. Ideal aid for tracing radio circuits.
POPULAR ELECTRONICS [2] Mar 1989 (v.6#3) pg. 23

Injecto-Trace combines a signal injector and a signal tracer into a single circuit. Works from audio frequencies up to 400 MHz.
POPULAR ELECTRONICS [2] Oct 1989 (v.6#10) pg. 23

Three-in-one test set combines a signal injector, logic probe, and an audio signal tracer.
POPULAR ELECTRONICS [2] Oct 1989 (v.6#10) pg. 104

Signal injector circuit produces a basic 600-Hz pulse-type output with harmonics up to 30-MHz for troubleshooting RF stages.
POPULAR ELECTRONICS [2] Sep 1997 (v.14#9) pg. 75

Experimenting with the 4093 NAND Schmitt trigger. Circuits include oscillator, signal injector, fluorescent-light inverter, fluorescent flasher, Morse code sender, beep-tone generator, LED flasher, and timer.
POPULAR ELECTRONICS [2] Feb 1998 (v.15#2) pg. 50

Signal-injector probe. A 1,000 kilocycle multivibrator is contained in a plastic pill container.
POPULAR MECHANICS Oct 1967 (v.128#4) pg. 196

Self-contained solid-state signal injector is built from a Keystone type 1810 test probe kit plus some other parts. Fundamental frequency is between 1 and 2 KHz. Est. cost: $2 (for kit).
RADIO-TV EXPERIMENTER Feb-Mar 1968 (v.24#1) pg. 91