Re: bulk buy of super caps? [update]

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Tesla729-at-cs-dot-com>

In a message dated 10/9/01 9:15:06 AM Central Daylight Time, tesla-at-pupman-dot-com
writes: 


>
> Greetings. 
>
> Some while ago I asked if anybody was interested in a bulk buy of commercial 
> rf pulse caps of around 0.05uF and about 17kVAC for duty cycles to 1000PPS 
> at upto 200kHz for multiple kW sized coils. The opinion was for the most 
> part negative as the robot people repeated "commercial caps don't work and 
> if they do they cost too much". 



Ken, all, 


My 10 kVA pole pig driven system has a nice 27.5 nFD, 42 kV 
X 12 (12 identical caps inside one unit) made by High Ener- 
gy Corp. and with it externally bussed for 6 strings of 2 
(82.5 nFD -at- 84 kV) and this baby rocks! And it's only 
about 3" X 5" X 25" long and weighs in at about 12 lbs! 
It would seem that this much energy density would sug- 
gest a mylar type dielectric, but this thing hardly gets 
the slightest bit warm even after several minutes of 8 kVA 
+ firing. I got this beauty from Tony DeAngelis (I'm not sure 
he is still on this list)? and it's been rocking in my big coil 
for nearly two years now! Thanks to Tony, I only have $95 
in this capacitor, shipping included. However, a part # 
inquiry to High Energy indicated that this thing would cost 
over $1500, so I suppose they can be too expensive:-( 

David Rieben