[RFI] RFI Source

[K9MA]

It appears to be only on 20.

73,
Scott K9MA

On 1/31/2023 5:20 PM, Dave (NK7Z) wrote:
> His,
> Is it on other frequencies, or just 20?
>
>
>
> 73, and thanks,
> Dave (NK7Z)
> https://www.nk7z.net
> ARRL Volunteer Examiner
> ARRL Technical Specialist, RFI
> ARRL Asst. Director, NW Division, Technical Resources
>
> On 1/31/23 14:59, 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
>>
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-- 
Scott  K9MA

k9ma at sdellington.us