MMC's vs CW and Duty cycle

["David Trimmell" <davidt-at-pond-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Hey all, Bert, Terry,

The recent posts by Bert on the VTTC Tank thread has got me wondering. Now
as Bert has pointed out, the fact that I am running a single string of
MMC's in my VTTC, I should have had failiar due to over current. I am
stumped. The theory and reality do not mesh...

Last night I did some tests:

First I hooked up the Vac coil to run in filtered DC mode, two 833C's
powered by a 125# plate transformer. Measured Tank capacitance (7 series
0.015 uF Panasonics): 2.12 pF. Measured Primary Inductance: 81 uH. 9K in
grid leak. 16 uF filter cap.


1: Brought up plate voltage to 2300V, 6-7 in flame discharge, but would
trip 20 amp breaker after 10-15 seconds of run time, barely perceptable
color on plates. No detectable heating of Caps. That should be 11.8 amps
on the caps.

2: Rewired Plate Transformer for lower output. Brought Plate voltage up to
1825V, 4+ inch flame discharge. Ran (5) 40 second tests, with 15 second
breaks to test temp of caps. After all runs there were some notcable
heating of the leads, but no real heating of the caps them selves. This
should have put 9.34 amps on the caps.

Do these results make sense? Do I need to go for longer run times?

Sugestions, anyone?

Regards,

David Trimmell
www.ChaoticUniverse-dot-com