[Elecraft] P3 Noise signature

[Dave Van Wallaghen]

Fred,

I have a plasma tv here and that sounds close to what I see when it is 
on. It pretty much wipes out the AM BC band and very ugly for all ham 
bands 160-10m. I can take a snapshot with my P3 and send it to you if 
you'd like to compare.

Ironically, I just had a daytime RFI issue resolved here. It started a 
few months ago. I would come home from work in the morning and listen 
around for awhile and notice the noise would start when the sun came up. 
Eventually, I noticed it went away at night. It was prominent on 160-20m 
and it was only detectable on my vertical dipole. I could not hear it on 
my doublet about 60' away. It was like very rapid lightning type pulse 
noise. I was starting to think one of my neighbors may have installed a 
new solar panel array.

Long story short, I finally eliminated power sources in the house 
without relief. I then realized that the vertical dipole was near a 
garden with some 2-3 year old solar lights my wife put in there. 
Removing the lights and batteries eliminated the noise. A couple of the 
fixtures had water in them and my guess is they were the problem. Crazy 
to think a little solar charger like that could raise so much hell ;-)

73,
Dave W8FGU


On 04/29/2013 10:17 PM, Fred Jensen wrote:
> I usually check into the No Cal Net on 3533 each night.  I've begun to
> get predictable noise with a unique signature on the P3 WF.  It's a
> series of bands, the first [around 3545] is the widest, they get
> narrower up from that and the separation seems to be about 40 KHz.  The
> higher components get narrower but aren't any weaker.
>
> Occasionally I've see it come on to an otherwise quiet band, and all the
> "bands" on the WF drift some before stabilizing.
>
> I have a screen shot from the P3 I'll send, anyone have any idea what
> this is?  I never see it in the daytime on any band, just in the
> evening, which is suspicious ... plasma TV?
>
> If it's my neighbor Casey, I'll just need to live with it, we don't do
> battle with our neighbors.  Besides, Sampson, their cat, gets along with
> ours and shares his food.
>
> 73,
>
> Fred K6DGW
> - Northern California Contest Club
> - CU in the 2013 Cal QSO Party 5-6 Oct 2013
> - www.cqp.org
>
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