[R-390] (no subject)

[Fred L. Haney]

I had similar problems about a year ago with strong broadband buzz-saw =
type RF noise with fundamentals below MW band radiating multiple =
harmonics up past UHF TV frequencies. I also took my Sony SW receiver =
outside and heard it on the power lines; called the power company who =
sent a tech specialist, and noise was coming from my house, and =
radiating to outside power lines !=20

A wall wart power supply had somehow partially shorted a diode or =
something, and was resonating the house wiring and L/C loads, acting =
like a pulse generator. It would come and go at random intervals, with =
no apparent reason for the trigger. Removed it and never had it again. =
This can happen to all kinds of stuff: surge protectors, automatic =
controllers, etc.

When it happens, take the portable RX around the house and "sniff" every =
corner. It helps to have the receiver with you next to the breaker panel =
and switch off each circuit breaker until the noise goes away, isolating =
the problem sector location. Then zero in on that part of the house. You =
will really be surprised what you find.       73,  Fred

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