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Re: [TCML] microwave oven caps



On 7/15/19 2:38 PM, Rinner wrote:
"For a voltage doubler at line frequency, though, they work just fine."

That thought scares me :)

Well, that is their design intent - microwave ovens are basically a half wave doubler, with the second diode formed by the magnetron.

I've seen people build fairly impressive stacks (10 stages) of microwave oven diodes and capacitors - the challenge is that if you suddenly discharge it (like you draw a spark from the top of the stack), you often destroy a bunch of diodes, because of the high peak curent.

So a good experiment if you have a lot of cheap HV diodes.



On Mon, Jul 15, 2019, 4:16 PM jimlux <jimlux@xxxxxxxxxxxxx> wrote:

On 7/15/19 11:36 AM, undisclosed recipient via Tesla wrote:
Has anyone used microwave caps as they are around 2100 volts each?
If not, why?


They're designed to filter line frequency (50/60 Hz) and have high loss
at 100kHz+ TC frequencies. Most also have a bleeder resistor built in
that is parallel to the capacitor.

For a voltage doubler at line frequency, though, they work just fine.


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