-----Original Message-----
From: Rob Atkinson
Sent: Saturday, May 05, 2012 4:22 AM
To: Jim Thomson
Cc: amps@contesting.com
Subject: Re: [Amps] The power of an oversized electrolytic capacitor
832 uF at 7.7 KV. No offense, but that's a waste of capacitors. I
won't get into the stored energy.
73
Rob
K5UJ
On Fri, May 4, 2012 at 9:28 AM, Jim Thomson <jim.thom@telus.net> wrote:
> ### BTW, My latest creation uses 24 x 10,000 uf @ 450 vdc caps, all
> in series..
> and charged up to 7700 vdc. That’s one bank. I built a 2nd identical
> bank of 24,
> and parallel the 2 x banks together... onto a common buss....
&&& I got several case loads of the caps for cheap, so it made for a good
experiment, so
why not. B+ doesn't budge. PO is way up. Ripple is zero. TX imd
improves. Short the anode
to chassis, and HV fuse blows open in less than 2 msecs, event over, no big
deal.
Peak fault current is just 7700 v divided by 50 ohms = 154 A. It's
actually less than 154A,
since the ESR of all the caps in series + any Z from the interconnecting
wiring + Z of the
plate choke etc. Replace HV fuse, and everything back to normal. Just
another boring day
here at HV central.
Later... Jim VE7RF
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