Re: Build own capacators

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Ed Phillips <evp@xxxxxxxxxxx>

Original poster: "James Zimmerschied" <zimtesla@xxxxxxx>

Ed,
the mica caps were 5 strings of 5 in series. Nominal 0.01 microF each 
but measured around 0.009 microF in the MMC. They are Sangamo 
Electric Co CM60B103K TYPE A2 if any of that is significant.

The barium titanate caps I borrowed are being used in a medium sized 
coil (Bob Svangren's) which has been operational for over 10 yrs and 
has many runs in the 3-5 minute range. It seems they warm up a bit 
and change value a little but seem to be holding up for Bob. His PT 
powered coil puts out 72-84" streamers. I believe he is using 0.054 
microF total in his cap bank.

Regards,
Jim"

   OK.  That would give you a nominal 0.01 ufd and a measured 0.009.
That's a lot of mica capacitors but should be a good setup.  The 
titanate capacitors you're using must be lower loss than the HV 
filter capacitors I have here.  After a minute of operation (12 kV, 
100-200 pps) they get uncomfortably warm to the touch.

   About 12 years ago Bob Svangren mailed me some pictures of some 
of his coils.  Beautiful work!

Ed