RE: [TCML] Hello. New Coiler needs advice.

["Lau, Gary" <Gary.Lau@xxxxxx>]

I don't know that a bottle cap needs a bleeder resistor any less than any other type.  They're certainly capable of holding a dangerous charge.  Of course one can't assemble the needed ten+ string of resistors across a bottle as neatly and easily as placing one resistor in parallel with each MMC cap, but that doesn't diminish the need.  You'd probably have to assemble the resistor string on a pierce of perfboard, something like this:
http://mysite.verizon.net/laushaus/tesla/srsgconns.jpg

But I would acknowledge that most bottle caps don't have bleeders, probably because they are built as a no-frills model, and there's no convenient place to put the resistors.

Regards, Gary Lau
MA, USA

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of Yurtle Turtle
> Sent: Thursday, December 18, 2008 7:37 PM
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] Hello. New Coiler needs advice.
>
> Welcome aboard. Greg Hunter is our bottle cap guru here, but my experience is
> that bottle caps don't need bleeder resistors, with a little common sense. Discharge
> them before touching anything. I don't recall ever seeing a residual charge on mine,
> though I didn't concider all failure modes at that time.
>
> Adam
>
> --- On Thu, 12/18/08, Ron Slack <owlman.ron@xxxxxxxxx> wrote:
>
> > From: Ron Slack <owlman.ron@xxxxxxxxx>
> > Subject: [TCML] Hello. New Coiler needs advice.
> > To: tesla@xxxxxxxxxx
> > Date: Thursday, December 18, 2008, 6:14 PM
> > Hello All,
> >
> >    I'm an EE Student looking for a unique hobby, and
> > coiling seems to fit me
> > perfectly.
> >
> > I've been reading all I can find online for the last
> > few weeks, including
> > many of the posts to this list.
> > I'm starting to come up with designs for my first coil
> > using a 15/30 NST I
> > got used from a local sign shop.
> > Javatc says I need a LTR cap of 8nF for my tank. My plan is
> > to use 5 wine
> > bottle caps at a value of 1.55 - 1.62 nF each.
> > Is there a good way to put a bleeder across caps like this?
> >
> > Also, I'm a little fuzzy on the design of my spark gap.
> >  playing with javatc
> > for a bit, I came up with this:
> > ----------------------------------------------------
> > Static Spark Gap Inputs:
> > ----------------------------------------------------
> > 8 = Number of Electrodes
> > 1 [inch] = Electrode Diameter
> > 0.28 [inch] = Total Gap Spacing
> >
> > ----------------------------------------------------
> > Static Spark Gap Outputs:
> > ----------------------------------------------------
> > 0.04 [inch] = Gap Spacing Between Each Electrode
> > 21213 [peak volts] = Charging Voltage
> > 20390 [peak volts] = Arc Voltage
> > 34333 [volts] = Voltage Gradient at Electrode
> > 72822 [volts/inch] = Arc Voltage per unit
> > 96.1 [%] = Percent Cp Charged When Gap Fires
> > 10.312 [ms] = Time To Arc Voltage
> > 97 [BPS] = Breaks Per Second
> > 1.66 [joules] = Effective Cap Energy
> > 0 [peak volts] = Terminal Voltage
> > 161 [power] = Energy Across Gap
> > 31.9 [inch] = Static Gap Spark Length (using energy
> > equation)
> >
> >
> > is it a good idea to have my arc voltage this close to
> > Vpeak or should I
> > close the gap a bit more?
> > I figure if I set my safty gap just a little higher than
> > .28"/2 for each
> > side to ground I should be good.
> >
> >
> > for my primary I plan to use
> >
> > Primary Coil Inputs:
> > ----------------------------------------------------
> > 7.5 = Radius 1
> > 13.5 = Radius 2
> > 0 = Height 1
> > 0 = Height 2
> > 12.5 = Turns
> > 0.25 = Wire Diameter
> > 0.008 = Primary Cap (uF)
> >
> > with a 6" by 30" secondary winding, altough I
> > have yet to get some magnet
> > wire.
> >
> >
> > Thanks,
> > Ron

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