Thread: Kenwood TS-570S
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Old September 10th 08, 09:37 PM posted to rec.radio.amateur.equipment
JB[_3_] JB[_3_] is offline
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First recorded activity by RadioBanter: Apr 2008
Posts: 543
Default Kenwood TS-570S


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...
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


Put the choke balun at the feed point.
Don't touch the FSM antenna to any metal. You might blow the diode.
Is there low swr on dummy load?
Is coax and dummy load double shielded?
Motion detector probably needs to be bypassed.
Check for ground faults in the house wiring.

What kind of antenna? Describe 'good ground'