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Registered Member #477
Joined: Tue Jun 20 2006, 11:51PM
Location: Seattle, WA
Posts: 546
Bump.
Chris: Any updates? It's taken great feats of personal restraint to avoid asking for this long ...I mean... if it all blew up, it's still worth sharing... we can all learn from these things (taunt, taunt, taunt) ))
Registered Member #477
Joined: Tue Jun 20 2006, 11:51PM
Location: Seattle, WA
Posts: 546
Christopher Miles wrote ...
I have a few SANGAMD mica caps and will put them in a fashion that works best. Starting value will be around .0024MFD @ 20,000PWV @ 24 amps. I just built two 833C coils for friends and used one of these caps @ 5Kv on the plate and it did not even wiggle. Man they are sweet caps.
YAYYYYYY!!! I'm very glad to hear it. I have four of these same caps, one or more of which will undergo "first light" here pretty quick. I know that ~3x the plate voltage is supposed to provide for a pretty conservative tank cap rating, but I'm still nervous as hell about using just one of them because I have no idea where I'd find another nice new one if I blew one of them up! (having an odd number would suck!) And at the same time, using all four in a single-tube ~1kW coil for 2.4nF @ 40kV @ 48A would be EXTREEEEEEEEEEEEEME overkill!! BUT...I may do it anyway
Hi Chris. Thanks for the reply. If you have seen my thread about the 4kAV VTTC you will see that i have very simmilar mmc (2,8 nF at 30 000v ) but it si enormous in size my also i a extreeeeme overkill
Registered Member #477
Joined: Tue Jun 20 2006, 11:51PM
Location: Seattle, WA
Posts: 546
huben Panev wrote ...
my also i a extreeeeme overkill
OTOH, "extreeeeeme overkill" in the tank cap is probably a happy thing. Having your tank cap be the toughest part of your setup means that everything else will blow up first (which is great if the other parts are cheap The caps often aren't.)
These Sangamo mica caps are physically huge, hence my original "overkill" comment:
They're bigger than soda pop cans and weigh almost 2kg each. They're ancient history too, so they go great with glass tubes These are the same caps Chris is using for his beast, AFAIK. Mica caps seem to be much larger than similarly-rated ceramics. It will be interesting to see if the higher temperature stability of mica proves advantageous, although I asked Steve W. about this once and he said he'd never observed any heat-related detuning in his coils, and he's used strontium titanate (SrTi) caps exclusively. That is goodness in general, since they've lately become available very cheaply on eBay.
Let's hope Chris gets bored with his Marx generator pretty quickly here I can't wait much longer. I need quad-833C action!!
Let's hope Chris gets bored with his Marx generator pretty quickly here I can't wait much longer. I need quad-833C action!!
I fully agree. Everyone hire wants to see that beast in action. That's amazing cap Aaron. I love it . It's look more like a hand grenade than a capacitor, but once again I LOVE IT
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8Kva Quad 833C VTTC
. Waiting to see some great sparks 
...I mean... if it all blew up, it's still worth sharing... we can all learn from these things (taunt, taunt, taunt) 
These are the same caps Chris is using for his beast, AFAIK. Mica caps seem to be much larger than similarly-rated ceramics. It will be interesting to see if the higher temperature stability of mica proves advantageous, although I asked Steve W. about this once and he said he'd never observed any heat-related detuning in his coils, and he's used strontium titanate (SrTi) caps exclusively. That is goodness in general, since they've lately become available very cheaply on eBay.
I fully agree. Everyone hire wants to see that beast in action.