[Elecraft] [P3] Discoveries

[ab2tc]

I have a blip on the panadapter every ~60kHz over a very wide bandwidth. It
is worst on the 15m band. It appears to be coming from my Verizon supplied
Ethernet router possibly aided by a Gigabit switch just next to it. It is
partly picked up by my antenna, but inadequate shielding in my MFJ tuner/SWR
meter/antenna switch helps make it worse. I have tried clip-on ferrites on
every wire coming out of the router, including the power supply, to no
avail. Does anybody have any insight on what on Ethernet is going on at
approximately the 60kHz rate?

AB2TC - Knut


Rick Prather-2 wrote:
> 
> I can second that!
> 
> As soon as I got the P3 working I realized that the annoying buzz I had
> noticed occasionally as I tuned 20 Meters was actually a nasty, wide 20db
> noise source every 50 Khz.  It looked so bad on the P3 that it got me
> motivated to check it out.  
> 
> After a bit of disconnecting things here in the house before I was going
> to start flipping fuses I disconnected my u-Verse modem and killed the
> noise.  Then with the modem running again I started disconnecting
> connections - ethernet, data in/out  and phone connection.  By rerouting
> the phone line I was able to drop it about 10db.  Still there but better
> and now I have a roadmap to work on as much of the remainder as I can.  
> 
> It's amazing how what seemed like a minor annoyance became an obvious
> problem when it shows up on the scope!
> 
> BTW, has anyone noticed the very interesting waterfall pictograms created
> by the Chinese radar just below 40 meters?  
> 
> Rick
> K6LE
> <snip>
> 

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