On 09 Sep 2003 08:07:33 -0400, Sam Goldwasser
wrote:

| The HV diode and capacitor don't generally fail slightly. They are
| either good or dead.
Do you know which type (technology) those caps are?

| Could be the magnetron. Difficult to test without swapping in a known good one
| though.
In this situation, would you go trying the known good 0.84 uF / 1900 V in
place of the suspect 0.91 uF / 2100 V for, say, as long as one minute or two
(e.g. 10 tests of 10 seconds each)? I believe it would be OK since there
must be a large margin in the rating of these parts.

I now think I can easily insert a small resistor in series with the HV
transformer's primary, reducing the HV output. This will minimize the
possibility of damage to the known good cap, yet produce enough HV to make
it a real test.

I'll try that and let the group know.

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