On Sep 9, 7:27*pm, "Dale Parfitt" wrote:
wrote in message

...

Am experiencing RF on the chassis of the radio when transmit. *Have
good ground system, clean power supply, resonant antenna w/ low SWR.
When I touch the antenna of my RF Field Strength meter to any metal on
the radio, wattmeter or power supply it pins the needle. *Opened
radio, looked at ant output connectors, could find no problems or bad
solder joints. *Installed 1:1 choke balun on coax at radio, no effect
on problem. *Hear myself talking in the headset and when transmitting
it triggers a motion detector light mounted outside and above the ham
shack. *Same effect when using a dummy load. *Defect inside the radio,
anyone experienced this?

73, Steve

I don't believe your test is indicative of RF on the outside of your
feedline. Are you experiencing distortion on your SSB signal? Does the VSWR
change on your antenna system if you add in a length of coax? I think that
whatever you are touching your FSM to is simply acting like a longer
antenna. As for the motion detector- probably picking up RF directly from
the antenna- those things have no shielding or RF immunity.
Dale W4OP

If the transmitter is feeding RF via a shielded coax,into a shielded
50 ohm dummy load,and VSWR is low, I don`t think you have a problem..
Field strength as measured by portable meter, short antenna ,tuned
circuit,diode det. analog 50ua. meter ..I would expect to see RF all
over the shack..All this may be normal.. Harold W4PQW