Re: First light with 833 tube coil, then silence

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Dr. John W. Gudenas" <comsciprof@xxxxxxxxxxxxx>

Greetings Cameron and David

One last post before I hit the sack tonight (assuming I am still
lucid after grading exams).

I have to agree with Cameron, it would be hard to destroy that big
mica with two MOTs.
David this assumes that the tank capacitor is new. If it is pull, all
bets are off. You incur the risk of unknown stress.

David, your last post indicated you checked the level shifter power
supply and you thought it was ok.
 If you can't run an HV check on the tank cap like DC suggested then
I suppose you will have to swap it out
as a test.

Best of luck
John

On Sep 23, 2006, at 11:44 PM, Tesla list wrote:

> Original poster: "Cameron B. Prince" <cplists@xxxxxxxxxx>
>
> Hi John,
>
> I'm am aware of and agree with your statements. However, this is a
> G3 mica
> transmitting cap rated 12A @ 300kHz. The diode David is using is
> only rated
> at 750mA and would normally go long before the cap would. I guess
> stranger
> things have happened, but I would certainly rule out every other
> possibility
> before buying a new cap.
>
> This is the cap David is using:
>
> http://www.teslauniverse.com/images/vttc/DSC02483.JPG
>
> Notice it's almost as big as the tube...
>
> David is, if I'm not mistaken, running dual MOT's with the
> secondaries in
> series. I think it would be prudent to verify that one of those
> secondaries
> hasn't opened and would consider this much more likely than cap,
> diode or
> tube failure.
>
> David, let us know what you find.
>
> Thanks,
> Cameron

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