Tesla coil primary power
Subject: Tesla coil primary power
From: richard.quick-at-slug-dot-org (Richard Quick)
Date: Mon, 27 Feb 1995 00:13:00 GMT
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* Originally By: Dave Halliday
* Originally To: Jonathan Luthje
* Originally Re: Tesla coil primary power
* Original Area: FIDOElectron
* Forwarded by : Richard Quick
JL> Hi All,
> I'm up to the "primary supply" of my tesla coil and i need (some
> more :) advice ...
JL> I'm hoping to use a TV Flyback transformer to supply about 80,000V
> to the tesla primary coil (rather than use a more expensive
> neon-transformer) ...
Whoops! You have your mind focused on the voltage and are not looking
at the current. You need a real minimum of 30 milliamps for any kind of
good discharge. I am building one now based on several neon
transformers that will provide 150 Milliamps at 15,000 volts. The
flyback units are pretty much electrostatic - very minimal current.
You must have both current and voltage.
JL>1) I want to run the Flyback directly from the mains (with a suitable
>current limiting resistor, of course), could someone tell me the maximum
>number of watts that the Flyback will dissipate
>(uncooled) without "melting"??
Nope - the flyback is designed to run in a resonant circuit at about
15,000 cycles / second - you will totally hose it's efficiency running
it at 60 Hz
JL>3) I can use a Walton-Cockcroft Voltage Multiplier circuit to boost the
>voltage (instead of a flyback), so I can acheive much higher
>through-currents. Is there any way that I can convert the DC-Out of the
>multiplier to AC (to drive the primary coil), or is there already enough
>ripple in the multiplier output to drive the coil??
With every stage in the C/W voltage doubler, you loose a *lot* of
current. You need current. It takes raw power to produce nice arcs.
! Origin: Grey Matter * Seattle, WA * (206) 528-1941 (1:343/210.0)
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