[RFI] Line noise vs Frequency

[Pete Smith N4ZR]

Hi Stephanie - I know that.  I've been chasing line noise (and other 
noises) for 30 years or more, and have never encountered this inverse 
frequency dependence before, which is why I asked.

I have both HF and VHF DF equipment.  It's broadband noise so shows up 
on a spectrum display only as an elevated noise level, but the audio 
signature, especially on AM, is unmistakable.

73, Pete N4ZR
Check out the new Reverse Beacon Network
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On 8/8/2021 8:50 AM, Stephanie WX3K wrote:
> Hard to really say what the exact root cause without further information
>
> The character of the noise will you what the source may be. Share an audio clip of it. Do you have a real time pandapter in your rig ? A picture would help to. Most likely need to share these using a cloud link from dropbox or something similar
>
> DFing aroung the area to track the exact physical would be needed here. The source could be a powerline issue(arcing insulator, resistive connection) but it could be a source conducted onto the line from possibly a switching power supply.
>
> Stephanie WX3K
>
>
>> On Aug 8, 2021, at 8:24 AM, Pete Smith N4ZR <pete.n4zr at gmail.com> wrote:
>>
>> A (probably) dumb question:  I have a severe line noise to my west.  For some reason it is manageable on 20, much worse on 15 and crippling on 10.  These subjective descriptions are confirmed on my S-meter. Why would this be happening, and does it offer any helpful clues to finding the source?
>>
>> -- 
>> 73, Pete N4ZR
>> Check out the new Reverse Beacon Network
>> web server at <http://beta.reversebeacon.net>.
>> For spots, please use your favorite
>> "retail" DX cluster.
>>
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