I had a similar problem. It turned out to be the "ice-cube-tray-dumping"
motor in the ice maker in my freezer. I didn't find it until long after I
had had the power company come out and inspect their HV line, up about 40'
and their transformers. Naturally they didn't have any problems.
73 DE N6UF, Jim

"Pete Holden" wrote in message
news:zjTWb.290841$I06.2983429@attbi_s01...
: On my Icom 756 spectrum scope I'm getting S9 peaks every 2kHz or so all
: across the HF spectrum from 3mHz to 30mHz. This doesn't look at all like
: QRN since it's regular and discrete and they're narrow signal peaks,
: narrower even than a ham cw signal, all peaks the same strength. When I
: switch to a vacant antenna position, or to my dummy load, there is
nothing,
: so I'm assuming it isn't coming over the AC line. The noise signal is
: stronger on my vertical antenna than on my horizontal loop.
:
: I've seen this before, intermittently -- one minute on, two min off, 20
: seconds on, etc. But, today it's been going on for at least a couple of
: hours.
:
: Ideas anyone?
:
: Thanks, Pete
:
: