Ignoramus27098 wrote:
On Fri, 31 Mar 2006 18:53:25 GMT, Rich256 wrote:
Ignoramus27098 wrote:
On Fri, 31 Mar 2006 09:44:00 -0600, Tim Williams wrote:
"Ignoramus27098" wrote in message
...
so you need 30kV diodes, minimum. 40 or 50kV would be even nicer.
Tim, I lost you a little bit here, sorry. Are you saying that I need
single 30kV diodes and that putting 1 kV diodes in series is
unsuitable? Or are you saying that twenty 1,000 V diodes is not
enough?
30-50kV PIV "diode", collectively. You can make that "diode" out of as many
1N4001 diode*s* as you need.
Thanks, now I understand a little better. I will soon make a stack of,
say, 30 1N4007 diodes. That would let me test the capacitors with 13
kV.

i

Did something like that about 40 years ago. In our case we had to
bridge each diode with a small capacitor and large resistance resistor
because when seeing the reverse voltage, they did not all turn off fast
enough.

Hm... Were you trying to rectify a 60 Hz sinewave?

i



Both rectifying 400 Hz and use as a series diode in a resonant charging
circuit. Actually I was using 1 ampere silicon rectifiers which were
not fast enough. All it takes is one not turning off fast enough.