On 2/18/2020 4:38 PM, Andreas Wachter via Elecraft wrote:
Yes, I did run the K3 off of a battery and pulled the main AC breaker. Didn’t
make any difference. Thus my suspicion that the RFI is related to the 208 kW
ERP TV station (and/or 63 kW EPR FM station) which are within 1.6 miles and in
direct line of sight.
Do you have neighbors? Did you pull their breakers at the same time?
Do you have a UPS? They continue to run without power, so both they and
any connected equipment can create noise.
Did you take the time to study the link I posted?
73, Jim K9YC
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