Re: [TCML] Sangamo and MMC in VTTC

[futuret@xxxxxxx]

Dex,

I don't know.  Surely the spark loading will keep the voltage
clamped at some particular voltage.  If a large toroid is installed
to prevent sparking, then the voltage can build up higher.
If the coil is run without a breakout point, then the voltage
will go higher before being clamped down as the spark
breaks out.

Cheers,
John


-----Original Message-----
From: Dex Dexter <dexterlabs@xxxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Mon, Jun 29, 2009 5:39 am
Subject: Re: [TCML] Sangamo and MMC in VTTC



John,

What's your estimate for top volts of 36" spark VTTC?

Dex

--- futuret@xxxxxxx wrote:

From: futuret@xxxxxxx
To: tesla@xxxxxxxxxx
Cc:
Subject: Re: [TCML] Sangamo and MMC in VTTC
Date: Sun, 28 Jun 2009 13:39:16 -0400

Hi Jim,

For my 36" spark VTTC, I used RF mica caps rated at 8kV, but
I always used them in series for a 16kV rating .  Meanwhile the
transformer
voltage was about 5kV to 6kV.  There's resonant rise in the tank,
so that has to be allowed for.  I had no failures set up this way.
One time when I tried using a single mica at 8kV rating, it failed
rather quickly (within a few seconds).

Cheers,
John


-----Original Message-----
From: Jim Mora <wavetuner@xxxxxxxxx>
To: 'Tesla Coil Mailing List' <tesla@xxxxxxxxxx>
Sent: Sat, Jun 27, 2009 11:21 pm
Subject: [TCML] Sangamo and MMC in VTTC



Hi All,


I am scavenging parts for my (4x) 833c 6" coil. I am trying to keep the
freq
at ~ 350khz. That requires a .003uf or slightly less in my design. I
have on
hand a Sangamo type G2 (3.125" diameter x 3" high)(dual oval aluminum
end
plates) @ .003uf, 12amps, @ 8kv PWKG voltage. Will this stand up to this
abuse?  Sangamo's are getting hard to find.
I wish I had bought 4 several years ago to stack and parallel!



Thanks,

Jim Mora
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