A louder than usual humm most of the time is a problem in the high voltage
secondary circuit.
Put all of the primary connections back on the transformer.
Then disconnect the leads from the mag
“MAKE SHURE THEY ARE ISOLATED AND NOT TOUCHING YOU OR ANYTHING IN THE MICRWAVE CASE” then start the microwave.
If the loud humm goes away then you most likely have a bad mag.
Last edited by glen65 : 03-31-2008 at 09:32 PM.
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