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.

73, Andreas K6AKW 

> On Feb 18, 2020, at 10:00 AM, Hank <[email protected]> wrote:
> 
> 
> Have you tried pulling your main AC breaker and running your K3 on a car 
> battery?  That way, you are sure that nothing in your house (switching power 
> supplies, poor mechanical joints, etc.) is creating the noise.  
> 
> 
> I was able to convince my nearest neighbors to shut down their AC panels also 
> after my house seemed "clean".  
> 
> 
> I finally found 2 bad crimped power line connections down the street from my 
> and a home made fence charge at a goat farm about 300yds behind my house 
> through the woods.  Another ham and the local power company came and helped.  
> The power company did their work and it cleared up several S units, but 
> something was still there.  Riding around with a scanner tuned to 1800kHz (AM 
> mode) with no antenna connected yielded the goat fence.  The power company 
> came out with a listening device to verify my findings.  I offered to buy the 
> farmer a fence charger from the hardware store, but he went ahead and did it 
> on his own - it really helped having the power company there!!
> 
> I still have a neighbor with a noisy plasma TV - an MFJ-1026 with a longwire 
> out the window nulls it out quite well when the TV in on.  Eventually the TV 
> will die (I'm hoping).
> 
> Good luck!
> Hank
> K4HYJ
> 
>  
> ----- Original Message -----
> From: Andreas Wachter via Elecraft ([email protected])
> Date: 02/18/20 12:39
> To: [email protected]
> Subject: [Elecraft] RFI issues
> 
> I live about 1.6 miles from some tall antenna towers broadcasting digital TV 
> (KBCB) at 208 kW ERP on channel 19 (500 - 506 MHz) and on FM (KWPZ-FM) at 63 
> kW ERP on 106.5MHz - according to FCC info on KBCB and KWPZ-FM. Ever since I 
> moved to this QTH a few months ago, I am unable to use my K3: solid S9+ noise 
> on all bands using a makeshift dipole strung up on some trees outside my 
> house. I’ve tried to locate the source of the RFI within my home but so far 
> have been unable to locate any RFI emanating from within my home. Could it be 
> that the TV/FM stations antenna towers, which are within direct line of sight 
> from my house, might be responsible for the RFI?
> 
> 73, Andreas
> 
> K6AKW
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