Re: [TCML] Pole Pig Cap

[DC Cox <resonance@xxxxxxxxxxxx>]

After carefully deburring the ends of your rods, you can immerse each one in
AC-43 varnish and then let air dry overnight.

I make up a square core 3" x 3" x 28" using silicone steel. I imerse each
individual piece in AC-43, let dry, and assemble taping them tightly
together with glasserized tape that forms a tight bond when heated in an
oven.

Makes a nice power reactor when using in a 300 turn #6 AWG wire.  I never
use variacs anymore --- not neccesary for full current control.  I use a
gearmotor 50 rpm to back the core out of the 300 turn coil.

Dr. Resonance



On Tue, Jun 9, 2009 at 3:13 AM, Yurtle Turtle <yurtle_t@xxxxxxxxx> wrote:

>
> Why not use the roll of wire as a ballast as is? I've heard of folks using
> 500' spools of wire as ballasts without any additional effort. Simply hook
> up a Jacob's Ladder (climbing arc) and measure current draw. You may already
> have what you need.
>
> Adam
>
> --- On Mon, 6/8/09, Tyler Pauly <rpggod714@xxxxxxxxx> wrote:
>
> > From: Tyler Pauly <rpggod714@xxxxxxxxx>
> > Subject: Re: [TCML] Pole Pig Cap
> > To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> > Date: Monday, June 8, 2009, 6:08 PM
> >
> > My more pertinent question is about STR caps.  Will
> > this result in large streamer-length loss, or will I be okay
> > going with a STR cap?
> >
> > Also, for my ballast, can I individually insulate the
> > welding rods with a layer or two of electrical tape?
> > Would that be sufficient?
> >
> > Thanks again guys,
> > Tyler
> >
> >
> > PS: I'm gonna try out the 10 AWG anyways, I already got a
> > roll really cheap... at least it'll be exciting.  :P
> >
> >
> >
> >
> >
> > ----- Original Message ----
> > From: DC Cox <resonance@xxxxxxxxxxxx>
> > To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
> > Sent: Sunday, June 7, 2009 9:16:40 PM
> > Subject: Re: [TCML] Pole Pig Cap
> >
> > The pulse rate of the 35 kV Maxwells is usually around 2-3
> > pps, not high
> > enough for the 400 ppps a large coil operates best at.
> >
> > The 10 AWG is not large enough.  The xmfr hits peaks
> > drawing approx 7-8
> > times the average current value.  You should use
> > 6  AWG at 60-70 Amps over it will over heat.  Ask
> > me how I know this ---
> > melted windings.
> >
> > non synchro around 400 pps is the best way for large
> > sparks.
> >
> > DC
> >
> >
> >
> >
> > On Sun, Jun 7, 2009 at 3:41 PM, Tyler Pauly <rpggod714@xxxxxxxxx>
> > wrote:
> >
> > >
> > > I'm still brainstorming on my choice of tank cap for
> > my 10 kVA pig.  The
> > > goal was to run it around 12-14 kVA  by means of
> > 240V 50-60A.  It will be
> > > limited by a ballast inductor of 10 gauge wire wound
> > around a PVC form with
> > > individually insulated welding rods inside.  I
> > will soon be testing the
> > > ballast to see if the 10 gauge can take short run
> > times without going up in
> > > flames.
> > >
> > > As to the capacitor choice, I'd love to go with one of
> > DC's .1 mfd 80kV
> > > caps but I just can't afford one at the moment.
> > I looked at the standard
> > > 37667 Maxwells but I don't think I'm comfortable with
> > running single cap
> > > strings, as the 35 kV rating just isn't high enough
> > for comfort, unless
> > > someone else has run w/o problems?  MMC's seem to
> > be out of the question as
> > > well, unless there is some cap I haven't yet found.
> > >
> > > However, all of the above thought process was assuming
> > trying to get
> > > ~.1mfd.
> > >
> > > I recently came upon documentation of STR caps.
> > I was scanning the archive
> > > for STR caps with pole pigs, and I can't really find
> > much.  What is the
> > > consensus on having a STR cap?  I was hoping for
> > something around .04-.05
> > > mfd.  Cres looks to be .092 mfd for 60A input and
> > .0767 mfd for 50A.
> > >  However, these C values don't take into account
> > the L of my ballast, which
> > > seems to be important.  I don't know how to do
> > this...
> > >
> > >
> > > What I could find on STR's usually associated them
> > with ARSG's; why is
> > > that?  I had planned on using a RSG.
> > >
> > > If STR's are an accepted cap choice, this would really
> > help cut costs;
> > > since I'm still technically a poor college student, I
> > can't really drop 750
> > > dollars on capacitors.
> > >
> > > Thanks guys for all the help.
> > >
> > > Tyler
> > >
> > >
> > >
> > >
> > > _______________________________________________
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> >
> >
> >
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>
>
>
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