Stephanie,
Jim brings up many good observations.
My goal here is simply to provide you guidance to help you resolve your RFI
issue.
With the RFI present, connect your rig to run off battery power, and then turn
off the main circuit breaker to your residence.
This should be a 100 amp or 200 amp main circuit breaker, depending on your
service.
This should eliminate and rule out any AC-powered source inside your residence.
(watch out for battery powered uninterruptible power supplies) Check (or have
another person check via cell phone conversation) to see if the RFI goes away.
If it does, then turn off all the sub-panel breakers, turn on the main breaker,
and then turn on the sub-panel breakers one-by-one until the RFI returns. This
will locate the room or circuit that is causing the RFI. Then use detective
work and check all devices plugged into that particular circuit. (an appliance
may be hard wired in, like ovens, or under counter lighting, or have hidden
plugs, like refrigerators)
If the RFI is still present with the main breaker off, then most likely it is
an external source. A directional antenna could help locate the source. A beam
(large at 6M), small loop (see "Handheld Direction Finding Loop Antenna for RFI
Location" Gary W. Johnson, NA6O) or perhaps DX Engineering NOISELOOP Portable
Receive Flag Antenna Kit based on the design by Don Kirk, WD8DSB could be of
service.
I suggest keeping an RFI notebook recording date, time, frequency or
frequencies affected, signal strength, characteristics of noise, weather
conditions (humidity and temperature) whether engaging noise blanker affects
it, etc.
Hope this helps.
Chris
AF6PX
ARRL RFI PLN Technical Specialist, Los Angeles Section
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