[Elecraft] P3 visualizing local noise

[Craig D. Smith]

I've also discovered local noise sources from the P3 display - much more
useful than the single frequency response of the K3 alone - a VERY useful
diagnostic tool.

But it gets even better.  I had one switching supply type noise that I
couldn't isolate to anywhere in the shack.  I wanted a portable tester to
carry around the house and possibly outside to find the culprit.  Could have
tried a portable AM radio or used the handy little WinRadio RFI detector.
But wanted something more sensitive and visual, but smaller and more
portable than the K3/P3 combo.  

So used the P3 alone.  Picked a harmonic of the noise that was within the
native frequency range of the P3, set the P3 to a custom IF freq near there,
hooked it to a small 12V gel cel for power and a small loop for a sensing
antenna.  This setup was fairly small and light and completely portable.
Worked great!   Did find the culprit - coming from the microwave oven in the
kitchen.  I now unplug the oven during contests, etc.

73   Craig   AC0DS