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

["DC Cox" <resonance@xxxxxxxxxxxx>]

If you contact me off-list I will send you a complete set of plans for a
nice coil running on a 30 mA xmfr.

Glass does work but soaks up a lot of the xmfr's energy since it is a poor
dielectric at RF frequencies.  MMC caps will
offer much higher performance for your small coil, they are much more
compact, and don't leak fluids when you move the coil
about for demonstrations.

Happy holidays,

Dr. Resonance




On Thu, Dec 18, 2008 at 5:14 PM, Ron Slack <owlman.ron@xxxxxxxxx> wrote:

> 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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>
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