The RFI “Sleuth”

In the last year I made two changes to my antenna farm that introduced RFI issues. Not RFI in the shack, but RFI that I am causing that: Only on 160M I all of a sudden cause my Trane Heater blower to turn on and off for short periods – just enough to blow cold air through the house and make fan noise Turn…

KY6R FSM Test

I’m using the simple 1979 “RF Sniffer” circuit and I’ve found that the minus line of the meter does add a lot of signal when you plug in a test lead and use it as a radial / ground plane. One really great use is to see how much radiation emanates from an amplifier at various power levels, and where the “drop off” is…

The KY6R Field Strength Meter

My take on the field strength meter is to use an old 1979 October QST circuit, but add a modern twist on the packaging and go with a clear Hammond translucent polycarbonate project box, 1591STCL. the caps are .01 uf, the diodes 1N34A and the potentiometer 10K The meter is a beautiful Simpson new old stock VU meter, model 7458. I’m just waiting on…