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Re: [TCML] Sputtering Gap



Hi Tim,

Running your coil with no secondary results in your caps seeing many times
the RMS current than it otherwise would.  If you had only run it for a few
seconds I would not be concerned about that.

I didn't understand what you meant by "there are smaller arcs running
around the conductor ring on the disc".  Kudos to you for having a safety
gap - I assume in parallel with the RSG?

What size primary cap are you using?

Regards, Gary Lau
MA, USA


On Wed, Mar 26, 2014 at 6:46 PM, Tim Flood <tfloodrr@xxxxxxxxx> wrote:

> Thanks guys for the input. Sounds like I'm the dummy!
>
> I hope I didn't run long enough to due permanent damage. It was run that
> way for only a few seconds, three times. The caps were not warm nor had any
> visible anomalies. I'll check the MMC value tomorrow and the transformer
> output using a jacobs ladder. Everything is at work so I'll have to wait
> until tomorrow.
>
> Thanks again. What are the chances Imay not have done permanent damage?
>
> Tim
>
>
> On Wed, Mar 26, 2014 at 5:02 PM, teslalabor@xxxxxxxxxxx <
> teslalabor@xxxxxxxxxxx> wrote:
>
> > Very Bad idea. When doing such Experiments you have to use at least a
> > dummy load in Form of halogen bulbs, which replaces the primary. When you
> > simply Run it without secondary, you kill your caps and neon, i think
> thats
> > what happened in Your case.
> >
> > Gesendet mit meinem HTC
> >
> > ----- Reply message -----
> > Von: "Tim Flood" <tfloodrr@xxxxxxxxx>
> > An: "tesla@xxxxxxxxxx" <tesla@xxxxxxxxxx>
> > Betreff: [TCML] Sputtering Gap
> > Datum: Mi., Mär. 26, 2014 21:25
> >
> > Could really use some help.
> >
> > Just completed a new 15/60 NST powered coil with a SRSG. With the tank
> > circuit completely wired and the secondary removed I thought why not
> check
> > the operation of the rotary gap. The first time I powered up it ran fine,
> > firing smoothly up to the max variac setting.
> >
> > Subsequent power-ups resulted in the gap sounding like gun fire. The
> safety
> > gap on the SRSG is firing, the arcs at gap alignment vary in intensity
> and
> > there are smaller arcs running around the conductor ring on the disc.
> >
> > The rotor is 5" diameter with four 1/8" carbide electrodes turning at
> 1800
> > RPM.. There are two stationary electrodes on the front side. Electrode
> > spacing is .030" per gap.
> >
> > Thank you,
> >
> > Tim Flood
> > _______________________________________________
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> >
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