is the famous #016 “Bug-Sniffer” field strength meter circuit that was
printed in Mick Tyners Book "Spook Book 1” that was engineered by John
S. Wilson Jr. It is very sensitive and operates in virtually all bands
up to the lower UHF bands. A regular digital voltmeter (uA) setting can
be used in place of the 50uA meter.
Considered a masterpiece by all
that have built it. The antenna can be anything from a stiff piece of
wire about 8 to 10 inches long or a telescoping antenna when built in
an enclosure. Just set the meter to ¼ scale with the calibrate and gain
controls. It detects the smallest signals from the very low radio bands
up to radiation from a microwave.
Useful for detecting low power bugging devices or powerful bugging
transmitters. As the meter climbs, decrease the gain and the unit will
lead you directly to the source of where the signal is being radiated.