[RFI] Broadband RFI on 10 meters

K9MA k9ma at sdellington.us
Wed Oct 15 22:10:23 EDT 2025


Here's a link to the image:

https://sdellington.us/hr/RFI/10m_25.10.16.jpg

On 10/15/2025 9:05 PM, K9MA wrote:
> At 02Z Oct. 16, the AM audio spectrum looks like this:
>
>
>
>
> (Assuming the image gets through.)
>
> It is much weaker than it was at 22Z, and I didn't hear the 1 kHz 
> components then, but it is peaking in the same direction. The 
> modulation frequency varies a bit.
>
> I've seen something like this before, though I can't remember what it 
> was: Broadband noise amplitude modulated at an audio frequency.
>
> 73,
> Scott K9MA
>
>
> On 10/15/2025 6:53 PM, Jim Brown wrote:
>> On 10/15/2025 3:14 PM, K9MA wrote:
>>> Any idea what kind of source could cause this kind of RFI?
>>
>> Can get a long time, wide frequency waterfall of the noise and email 
>> it to a few of us?
>>
>> 73, Jim K9YC
>>
>> _______________________________________________
>> RFI mailing list
>> RFI at contesting.com
>> http://lists.contesting.com/mailman/listinfo/rfi
>
>


-- 
Scott  K9MA

k9ma at sdellington.us


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