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Re: Rotary Spark Gap Design
- To: tesla@xxxxxxxxxx
- Subject: Re: Rotary Spark Gap Design
- From: "Tesla list" <tesla@xxxxxxxxxx>
- Date: Thu, 25 Nov 2004 19:19:16 -0700
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Original poster: "Harold Weiss" <hweiss@xxxxxxxxxx>
I'll second that, and add that plywood glue is conductive. I've had tracks
form right down the glue lines in plywood. And that was at 3KV to ground.
David E Weiss
> Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>
> 440 VAC won't be enough to operate your sparkgap. You do need a NST is
> are running a classic HV circuit and not SSTC. The lowest reliable
> potential is 3 kV min.
> Don't use a wooden disk. Most wood contains some moisture (3-5%) and will
> not hold off the high voltages -- especially RF voltages which like to
> across surfaces such as wood. Or, worse, it might start smoldering
> internally. Then, you shut off the lights, go to bed, and wake up to
> discover your shop or home on fire. Use type CE or LE phenolic or G-10
> phenolic plate for the rotor.
> Be safe!!
> Dr. Resonance
> > Dear forum members,
> > I'm planning to build a rotary spark gap:
> > 8 spinning electrodes mounted on a wooden disc,
> > 2 stationary electrodes,
> > brass bolts used as electrodes.
> > I have seen in some Tesla coil designs that the AC input voltage is
> > up to few kilo volts
> > (using NSTs/PolePigs), rectified and then fed to the tesla coil circuit
> > that is using the spark gap.
> > Can I run the tesla coil without stepping up the AC input voltage ? I'm
> > planning to use
> > 440VAC input, rectify it and then feed this DC voltage to the tesla
> > circuit which uses a
> > rotary spark gap. Any advice ?
> > Thanks in advance,
> > Rajesh.