Microwave Oven Capacitors - Testing

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Original poster: "Matthew Smith by way of Terry Fritz <twftesla-at-qwest-dot-net>" <matt-at-kbc-dot-net.au>

Hi All

Further to the recent views of Greg Hunter's wonderful new MOT-based 
PSU, I would moot the following question:

Since the failure of microwave ovens is very often due to a faulty 
capacitor, how should we test salvaged units?

My own thoughts are:
1) Check capacity with suitable DMM/capacitance bridge against value 
specified on can.
2) [only caps without in-built bleeder resistor] test with 500V Megger, 
or equivalent: after cap has charged, reading should swing to high Mohms 
(am I right?)

Cheers

M

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