Brian Hall wrote:
I've got a couple of MOTs and there is this 'middle' fabric coverered wire tucked in for a turn or two just under the secondary. Its what hooked into the MOC and magnetron.I see that the output for the secondary is there but just unused.
That's to run the filament of the tube. On a Microwave oven magnetron, the anode is positive, and the cathode is at a negative voltage relative to the chassis.
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