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Re: SRSG v. DC-RSG

Original poster: DRIEBEN@xxxxxxxxxxxxxxx 

Another BIG factor that causes capacitors to "explode" is
inferior, lossy dielectric that rapidly heats up due to
the I2R losses from the huge RMS currents generated by the
rapid pulse discharges of a Tesla coil circuit. I've had
caps to explode that had the proper voltage rating but
had a lossy dielectric like polyester. Simpe over voltage
by it self probably won't cause a spectacular exploding
failure, just an internal short that renders the otherwise
externally cosmetically good cap a "boat anchor".

David Rieben

----- Original Message -----
From: Tesla list <tesla@xxxxxxxxxx>
Date: Thursday, December 2, 2004 9:22 pm
Subject: Re: SRSG v. DC-RSG

> Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>
>
>
> The caps won't explode if you use Erms x 3. Cheat on this a bit
> and they
> might fail or explode.
>
> Also, use a safety gap.
>
> Dr. Resonance
>
> Resonance Research Corporation
> E11870 Shadylane Rd.
> Baraboo WI 53913
> ----- Original Message -----
> From: "Tesla list" <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Thursday, December 02, 2004 7:09 PM
> Subject: SRSG v. DC-RSG
>
>
> > Original poster: "Daniel A. Kline" <daniel_kline@xxxxxxxxxxx>
> >
> > Hi All,
> > For the first time in several years, I'm about to add a rotary
> spark-gap
> > to a system. The last time I used a rotary spark-gap, it was
> > asynchronous, and didn't work well with the setup I had.
> >
> > This time I'm using a 1.5KVA potential xformer at 14.4kV, and
> I'll be
> > testing Maxwell caps and MMC configurations to see which is
> best for
> > this particular coil.
> >
> > I'm wondering if I should try a variable break-rate rotary-gap
> on a DC
> > motor, or if I should try a synchronous rotary-gap.
> >
> > The reason I ask is because I had a cap explode when using an
> > asynchronous rotary-gap, and I'm concerned that the same thing
> might > happen if, while testing, I'm continuously varying the
> break-rate using
> > the DC-motor rotary-gap.
> >
> > I have DC motor handy, and I don't have a sync motor yet, but
> I've been
> > wanting an angle-grinder for a while now, so it wouldn't take much
> > convincing for me to go out and get one for machining the
> appropriate > AC-motor armature ;)
> >
> > Also, does anyone know of a decent tachometer circuit I can use in
> > conjunction with the DC-motor in case I go that route?
> >
> > Thanks,
> > Dan K.
> >
> >
> >
>
>
>