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Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
Hi all, I would like to estimate the DC high voltage output from my transformer. Is there any graph which shows breakdown distance in relation with applied dc high voltage when using needle electrodes?
Registered Member #834
Joined: Tue Jun 12 2007, 10:57PM
Location: Brazil
Posts: 644
Dr. Kilovolt wrote ...
Thanks, I've seen that page in the past but couldn't find it again PS. It seems that my TV transformer has no problems producing 90kV 8-o
I think that 90 kV is impossible from a TV transformer. The values on that site are for the initial spark, with the electrodes cold. If you increase the separation of the wires after the arc started, the required voltage is much lower. A measurement with balls is more reliable. This video shows the difference between balls and points: In this case the arcs don't get much longer with the separation of the electrodes because there is a large resistor in series in the circuit and a capacitor across the gap, to make a series of sparks instead of a continuous arc.
Registered Member #1936
Joined: Sun Jan 25 2009, 11:34AM
Location: USA
Posts: 17
Is that using a tripler module or just straight out of the flyback?
*edit* looking at the pic I realize its just a modern flyback. Thought it might have been one of those old style disc-wound ones. Those could pump some volts. Never seen a newer one that badass though. :)
*second edit*
You driving that with a function generator or just the normal 555 or feedback coupled self oscilating NPN transistors circuit we all know so well.
I never did much with flybacks in all honesty. I stuck to OBITs MOTs and NSTs. And ignition coils.
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Voltage vs. air breakdown distance graph?
