KY6R WiFi Field Strength Meter!

A while back I posted about a 1973 era field strength meter ( Ham Radio 1.0) that I built and used a very cool NOS Simpson 7458 meter, but put it in a new clear case. Enter Ham Radio 2.0 – I take the signal from that analog field strength meter and feed it into the ESP8266: And it transmits the micro voltage readings…

Raspberry Pi Zero W Remote Field Strength Meter

Last year I built this cool little Field Strength Meter that uses a circuit from the 70’s and a germanium diode. It is plenty sensitive and broad banded – meaning it has enough voltage to send to the input pin of a Raspberry Pi Zero W – and which could then be sent to the shack via WiFI. It would be easy to package…

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…