Jim Brown jim at audiosystemsgroup.com
Fri Jan 12 16:53:22 EST 2018

On 1/12/2018 1:36 PM, Leonard Halvorsen wrote:
> Sounds like maybe a memory or sensor refresh on a security or fire detector
> system.

Yes, that certainly could be a source for signals like this. If the 
source could be identified, it might be possible to suppress it with one 
or more multi-turn ferrite chokes, as described in my Killing RX Noise 
tutorial. k9yc.com/publish.htm

73, Jim K9YC

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