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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.

FREQUENCY MULTIPLIER
x   FREQUENCY DOUBLER
xx   ELECTRONICS

A frequency converter (multiplier). Circuit regulates the oscillation frequency of a VCO (voltage controlled oscillator). Use it to multiply by any factor up to ten or to provide a pulse at incremental phase angles.
AUDIO AMATEUR 4/1986 [Oct 1986] (v.17#4) pg. 29
Added Info AUDIO AMATEUR 4/1987 [Nov 1987] (v.18#4) pg. 57

Double the frequency of any CMOS or TTL clock signal with this easy-to-build frequency doubler circuit.
ELECTRONICS EXPERIMENTERS HANDBOOK Summer 1995 pg. 85

Double the frequency of any sinewave from 10 Hz to more than 50 MHz with this small module that can be permanently installed in almost any signal generator or used as an outboard module. Est. cost: $50 (kit).
ELECTRONICS EXPERIMENTERS HANDBOOK 1996 pg. 32

Double the frequency of any CMOS or TTL clock signal with this easy-to-build universal frequency doubler circuit.
ELECTRONICS NOW Nov 1994 (v.65#11) pg. 44

Sinewave doubler module will double the frequency of any sinewave input, providing outputs from 10 hertz to beyond 50 megahertz. Est. cost: $50 (kit).
ELECTRONICS NOW Feb 1995 (v.66#2) pg. 55

Simple frequency doubler circuit without a lower frequency limit.
ELECTRONICS NOW Sep 1996 (v.67#9) pg. 14
Added Info ELECTRONICS NOW Apr 1997 (v.68#4) pg. 14

Circuit for a X100 frequency multiplier or prescaler which simplifies low-frequency measurements and allows them to be measured on most frequency counters.
POPULAR ELECTRONICS [1] Sep 1980 (v.18#3) pg. 128

Build this frequency multiplier for your counter. Add low-frequency (10 Hz to 40 kHz) accuracy by inserting this multiplier between test cable and counter. Est. cost: $41.
RADIO-ELECTRONICS Nov 1982 (v.53#11) pg. 43