[RFI] 160m Noise

[Jim Brown]

This is NOT power line noise. It is some sort of electronic noise.  The 
clue is that it's multiple carriers modulated by "something."  The video 
would be more useful if the frequency axis was labeled.

See
http://k9yc.com/KillingReceiveNoise.pdf   and
http://k9yc.com/KillingRXNoiseVisalia.pdf

No ideas beyond that.

73, Jim K9YC

On Thu,5/4/2017 6:06 PM, Larry Burke wrote:
> Looking for ideas for what the source of this noise might be:
> https://youtu.be/cyzTbAFo9zs
>
>   
>
> The noise seems to start at the very high end of the AM broadcast band and
> extend well into 160m. There doesn't appear to be any relationship to
> day/night, 12-hr timer, temperature, rain, etc. It's pretty much there 24/7
> with brief reduction in amplitude (as seen in the video) from time to time.
> I am able to narrow down the direction of the source using my 8-circle
> receive array. Unfortunately that direction is directly into the
> neighborhood across the highway from me as well as into a residential pole
> line (although this doesn't seem line power line noise to me). Near as I can
> tell the noise is confined to the 160m band +/-. I do not hear it on other
> HF bands or VHF.
>
>   
>
> The receiver used is an SDRPlay with SDRUno software in the AM mode.
>
>   
>
> I apologize in advance for the poor quality of the video. It was taken on
> the spur of the moment with my phone. I'm open to ideas for improving video
> capture off my PC monitor as well.
>
>   
>
> - Larry K5RK
>
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