[Elecraft] PX3 Problem?

[Brian Waterworth]

Just out of curiosity, has any other wall wart or other device been plugged
in near the px3-kx3 recently?

Interestly enough, just this morning I saw new noise I hadn't seen before.
  It turned out to be a wall wart that was charging a car booster battery
pack and it was about 4-5 inches from the kx3.  I moved the kx3 away from
the wall wart about 10 inches and the noise reduced.

I zoomed the PX3 in to a 2khz span and I saw a spike at 60hz, 180hz, and
300hz symmetrically about the centre frequency.

I moved the wall wart to another plug about 3 feet away, no more qrm.

Hope this helps you.

Regards
Brian
VE3IBW