Re: [RFI] Does anyone recognize this RFI?

[Jim Brown <jim@audiosystemsgroup.com>]

On 4/15/2020 9:48 AM, K9MA wrote:
> Looks like a switching power supply running at 55 kHz.
Unlikely. SMPS are free-running, modulated by noise, so they are "humps" 
of noise that drift. These signals are stable in frequency with no 
modulation.
73, Jim K9YC


_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi