It sounds like the QRM is coming from a defective device with
digital control logic. The device enters a state that causes QRM,
then when you turn power off then on, it resets the device back into
a known good state. Or, it could be the defective device's power
supply.
Next time the QRM happens, power off a section of your house at a
time while monitoring the QRM. When you find the circuit the
offending device is on, you narrowed down your search. Or, you could
unplug everything in your house one device at a time while
monitoring the QRM. 73.
Chris Knight
Fort Lupton, Colorado
I once again experienced massive buzzing all around the house. It
seemed stronger near various things like lights and light switches,
etc... and when I turned off the main power switch and then turned
it back on, the noise went away. This happened last time, a few
months ago, too, and the same trick worked.
My question is - for anyone here who knows about such things - what
might be going on to cause the QRM, what am I doing when turning
the main power off and then back on, and most importantly is there
anything I should be telling my elecrician?
Saul
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