[RFI] Power Line Noise

Joe nss at mwt.net
Thu Apr 16 18:22:14 EDT 2020

Maybe thinking like this?

OK the noise is vertical. and since close by it is higher above the horizon?
so then when the hf yagi is not pointing to the noise, it is more 
closely matching the linear polarity of the elements?

The Original Rolling Ball Clock
Idle Tyme
On 4/16/2020 5:16 PM, K9MA wrote:
> On 4/16/2020 17:02, AA5CT wrote:
>> re: "I went out today to track down a noise source, which on the
>> HF bands appears to be coming from the east. "
>> Scott, I give you even money odds that you found ANOTHER noise
>> source on VHF, and not the one that was affecting you on HF (unless
>> you already got it fixed, and that was it, in which case I lose hi hi).
> I doubt it. This source is just too incredibly loud at 135 MHz and 
> close (maybe 300 feet from the antenna) that it can't possibly NOT be 
> causing HF interference. I agree with your point, though. When 
> tracking at VHF, I always hear lots of sources that are not the one 
> causing the HF problem. I deal with that by relaying the noise from 
> the HF receiver at home so that I can hear it while I'm out tracking. 
> There is always a pattern to the fluctuations. When I find that they 
> match, I know I've got the right source. This is the same principle as 
> taking the "noise signature", without the expensive equipment. It has 
> served me well.
> I didn't bother this time because the source is so ridiculously strong 
> on VHF right out my front door.
> 73,
> Scott K9MA

More information about the RFI mailing list