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4hv.org :: Forums :: Tesla Coils
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MMC arcing, blew a cap

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crashstudio
Sat Sept 26 2015, 05:32AM
crashstudio Registered Member #54484 Joined: Sun Feb 15 2015, 06:18PM
Location:
Posts: 46
OK so I stick with the same capacitance I had with the static gap then? It's getting confusing because everywhere I look all I see is values for static gap or sync rotary but nothing for just a rotary. Sync is the one that's synced to the frequency of the A/C input right? I'm not even going to attempt that one.
Did you actually vacuum seal your spark gap? That looks cool as hell. And it looks like you're using knob caps. They work better for you then cornell dubillier?
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Hazmatt_(The Underdog)
Sat Sept 26 2015, 09:31PM
Hazmatt_(The Underdog) Registered Member #135 Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
Synchronous you would have to machine the rotor of an AC motor.

Asynchronous will work with almost any motor, drill, angle grinder, whatever.

The gap isn't sealed, its just closed up for noise reduction, it took a while to build, but most anyone here could build one too.

I use doorknobs because they save space and have high voltage ratings, plus they don't get hot and die, they're really rugged.
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crashstudio
Sat Sept 26 2015, 11:52PM
crashstudio Registered Member #54484 Joined: Sun Feb 15 2015, 06:18PM
Location:
Posts: 46

So as far as the capacitance, what formula do I go with since everywhere I look all I see is only 2 values, 1 for a static and another for a sync rotary. I'm at a loss here.
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Hazmatt_(The Underdog)
Sun Sept 27 2015, 01:24AM
Hazmatt_(The Underdog) Registered Member #135 Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
If you want to go with what the software tells you, you can.

I was more interested in the actuals, like you are trying to find out, but you will find that if you scratch the surface it gets
complicated very quickly.

In Short, I use 1.4x Cres.

Here is the work to prove why: Link2
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