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Re: [RFI] Line noise vs Frequency

To: Pete Smith N4ZR <pete.n4zr@gmail.com>
Subject: Re: [RFI] Line noise vs Frequency
From: Stephanie WX3K via RFI <rfi@contesting.com>
Reply-to: Stephanie WX3K <wx3k@ptd.net>
Date: Sun, 8 Aug 2021 09:10:30 -0400
List-post: <mailto:rfi@contesting.com>
Please share a clip of the audio. Would love to hear it

Stephanie WX3K


> On Aug 8, 2021, at 9:07 AM, Pete Smith N4ZR <pete.n4zr@gmail.com> wrote:
> 
> 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
> web server at <http://beta.reversebeacon.net>.
> For spots, please use your favorite
> "retail" DX cluster.
> 
>> 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@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.
>>> 
>>> _______________________________________________
>>> RFI mailing list
>>> RFI@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/rfi
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