[RFI] FW: RFI Signature

Jim Brown jim at audiosystemsgroup.com
Tue Nov 25 01:18:00 EST 2025


On 11/24/2025 8:17 AM, Jeff (W4DD) wrote:
> Thanks to all that replied.  Some interesting thoughts to consider.  
Just found the links -- didn't scroll down long enough before. :)

As K8CN noted, it looks like the source is switching on for 10 seconds 
and turning back off. Is there any sort of pattern about times when the 
noise appears? Always the same length of time its on? Could keeping 
track of those times provide a clue? Perhaps to the neighbor?

How broad is the noise in frequency?  Can you do a much wider waterfall 
to get an idea of bandwidth?

I don't have a clue about possible sources, except that it doesn't look 
like a power control device.

73, Jim K9YC






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