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Registered Member #2008
Joined: Tue Mar 03 2009, 05:11AM
Location: USA, Frederick, MD
Posts: 118
Here comes the day to order parts -- shipping is money. So why not order more stuff for several projects?
I want to build a Tesla coil with no primary transformer and spark gaps. I want it to run off rectified or unrectified 120V ac. (120VAC can be rectified into + 120V and -120V)
Spark gap is only one way to make a non-linear breakdown component to feed our self-resonating Tesla transformer coil at the frequency it wants to receive the current.
I thought of Zender diodes, neon lignt bulbs, spark tubes, transistor-based switches, thyristor based switches.
Any good ideas or proven-to-work schemes?
I don't want 12 volt power supply. makes it 2 transformers again.
When the primary of Tesla coil resonates, it behaves like an element with inductance and capacitance. Therefore, when it's polarity matches the polarity of the AC power source and it has minimal resistance that way, then comes the zap of the spark? Am I right?
Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
SISG.
Just a hefty IGBT, some SIDACs, TVS's, and every day components. I would say that those are much better than spark gaps, due to the possibility of using much lower voltages, less losses, no spark gap wear, no machining or cutting, no tungsten, nothing spins, and quenching is done electrically (though *cooling* is needed for the IGBTs). They can get longer spark length per watt than sgtc's perhaps. Im not sure.
For 120v operation, you would need a high capacitance bank, and a low resistance/inductance primary due to the lower voltages, but it is doable.
Registered Member #2008
Joined: Tue Mar 03 2009, 05:11AM
Location: USA, Frederick, MD
Posts: 118
I totally agree. Didn't put SIDACs and TVSs on my list.
But are there any Tesla Coil drivers based of those components? I like the Tesla Coil construction where spark gap is in series with the primary of The Coil. Spikes can be suppressed.
Any circuits that you may have ran across? I found one so far. I'll countinue searching.
It is kinda pointless to use a transformer #1 and step down to 12volts. As pointless as step up to 2000.
couldn't find schematics
flyback transformer drivers get mixed up with Tesla coils
i made one it ain't so interesting made small blue spark
Registered Member #2008
Joined: Tue Mar 03 2009, 05:11AM
Location: USA, Frederick, MD
Posts: 118
Thanks I keep looking.
So far found 3 circuits that can possibly do the trick of no pre-trans solid state tesla coil Daniel Uhrenholt, your link links to a forum post that links to some website in some foreign language, that doesn't seem to exist.
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Tesla coil with no spark gaps. Straight from 120 volt wall socket. Possible?
