I have had some luck hunting down noise sources using small nonresonant loops
on a handheld, wideband receiver. I demonstrated the method at the Puget Sound
area Mike and Key Club's September meeting made from three Radio Shack items; a
one foot PL259 jumper, a UHF series T adapter and an SO-239 to BNC adapter.
The noise source also came from Radio Shack; an 8-AA battery charger.
One useful trick, for harmonically caused problems like these, and using a
small magnetic field antenna like a loop, is to tune to a LOWER frequency
harmonic of the source. This reduces sensitivity, but makes it easier to
locate the source.
Cortland Richmond
KA5S
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