[600MRG] Decodes last night

[Larry]

My neighbor is running his big pump/irrigation system. With the WX 
turning hot, it will probably be going most of the time until fall.

The pump is around 25 HP, DC, with a switch mode variable speed 
controller powered from 480 3 phase. It puts a lot of noise on the power 
lines and is impossible to null out by any means I've tried yet. With 
the power lines acting like a transmission line/antenna, there is no 
point source to null.

At any rate, I was surprised to see 4 stations show up in the overnight 
WSPR log. Condx must have been pretty good for signals to get though the 
20 dB or so of switcher noise!!

My participation will be mostly limited to those times when the 
irrigation is turned off, at least until late summer/fall.

Larry - W7IUV