[RFI] RFI Source

[K9MA]

On 1/31/2023 4:59 PM, K9MA wrote:
> I have what appears to be  very strange RFI source: it's very 
> broadband, covering at least the whole 20m band, but it's somehow 
> modulated at 1100 Hz. In AM mode, the 1100 Hz tone is audible and it, 
> as well as the second harmonic show up in the audio spectrum. The 
> tones are present wherever the radio is tuned on 20 meters. It's as if 
> a broadband noise source is modulated at 1100 Hz. I have heard the 
> tone shift frequency. Not a solar system, as it's present at night. 
> Any idea what this could be?
>
> 73,
>
> Scott K9MA
>
Audio spectrum:

https://sdellington.us/hr/RFI/NW%2020m%20AM%2023.01.31.jpg

-- 
Scott  K9MA

k9ma at sdellington.us