[Amps] The power of an oversized electrolytic capacitor

[Jim Thomson]

-----Original Message----- 
From: Rob Atkinson
Sent: Saturday, May 05, 2012 4:22 AM
To: Jim Thomson
Cc: amps at 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 at 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