I would like to homebrew a 20mfd/4'000v capacitor for linear power
supply.Any suggestions welcomed.Thanks,ZL2DG

Check on R.A.T. - the guys there have some tesla coil to power a phono
preamp or something that might need that ;-)

--
Gregg t3h g33k
"Ratings are for transistors....tubes have guidelines"
http://geek.scorpiorising.ca

If you've never built capacitors starting out with such a high voltage is
like trying to enter the Olympics before you've learned to crawl. I'd
suggest starting out small but better yet find some surplus lower voltage
units and put them in series with equalization.
73
Hank WD5JFR

"David McBeth" wrote in message
...
I would like to homebrew a 20mfd/4'000v capacitor for linear power
supply.Any suggestions welcomed.Thanks,ZL2DG

I would like to homebrew a 20mfd/4'000v capacitor for linear power
supply.

David-

My first thought was to take ten 200mfd/450v electrolytics and wire them in
series, each capacitor with a parallel resistor to ensure equal voltage
division.

The problem is that you may not find a single electrolytic capacitor with that
high a voltage. Even if an electrolytic's voltage is determined by stressing
them to a higher value, there may be a limit well below 4KV.

You need to do a lot of research in physics and/or chemistry if you're serious
about homebrewing such an electrolytic. The usual approach is to construct
such a high voltage capacitor using a porous oil-soaked dielectric material
("oil filled capacitor").

73, Fred, K4DII

On Mon, 18 Oct 2004 17:01:13 +1300, "David McBeth"
wrote:

I would like to homebrew a 20mfd/4'000v capacitor for linear power
supply.Any suggestions welcomed.Thanks,ZL2DG

Presume you mean 400V.
Why not just buy one?

If you mean 4000V all you have to do is string some
caps in series. Use balancing resistors as your bleeder
and you are on the way.

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