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Old 07-29-2012, 12:39 PM
Don Lindsly Don Lindsly is offline
Ex-Philco
 
Join Date: Jul 2005
Location: Colorado
Posts: 450
Stringing low voltage diodes in series to get a high voltage diode works best in higher current applications where equalizing resistors can be paralleled across each diode. Those resistors could upset the low current focus circuit.

Microwave oven diodes are rated for a couple thousand volts at high current so high voltage would likely cause early failure.

There should be plenty of focus diodes around. I suggest a direct replacement.
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