RE: GE Capacitor 42L2121

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

Original poster: "Mccauley, Daniel H" <daniel.h.mccauley-at-lmco-dot-com> 



I have to note that I use these type capacitors (in particular the
0.33uF, 2kV ones) for tesla coils
up to 5kW with no problems.  (And thats only a single MMC strand - no
parallel strings to divide current)

Dan


Hi John,

These capacitors you are using are probably the best available for
"tame"
RMS type currents.  If you have high "peak" currents the end plates of
the
GE caps will blow out and there are better caps for that like the
Cornell
Dubillier 941 types...

Do you have an idea of what the real RMS and peak currents are?

Here are about the best caps out there:

http://www.cornell-dubilier-dot-com/misc/h942.htm

Cheers,

          Terry


At 02:40 PM 3/4/2004, you wrote:

 >Re: GE Capacitor Part Number 42L2121 1.2uf 1200 vdc.
 >
 >These GE capacitors are really getting hot.  They replaced an SCR
 >commutation capacitor rated at 15uf 1200v.
 >the SCR capacitor was polypropolene and aluminum foil.  the GE
capacitor
 >is metalized polypropolene.
 >
 >Is there any one that makes a polypropolyne and aluminun capacitor for
 >snubber high current applications.
 >This capacitor is used in a solid state hard tube modulator.
 >
 >I will appreciate any information or expertise you can give me.
 >
 >Many Thanks,
 >
 >John