Re: Optimum performance: Coil specs.

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Terry Fritz" <twftesla-at-uswest-dot-net>

Hi Simon,

With either toroid your coil will run around 210kHz which is fine.  You
could go for either a 5.3 or 10nF cap but the value is not super critical.

With 6.3nF you will tap near turn 12.4
With 5.3nF tap is at 13.4
With 10nF tap is at 9.8
Thus, your primary is great.

Coupling with 12 turns is about 0.10 which may be a little low.  You may
consider making the center diameter of the primary like 10 inches but
probably not a big deal.

you should have good safety gaps across the transformer and may have to
reduce the number of gaps used on your static gap so the safety gaps do not
fire all the time which is normal.  Never increase the safety gap setting
to try and stop them from firing (they will, but permanently :-O)

So it all looks pretty good to me.

Cheers,

	Terry

At 08:05 AM 5/3/1999 -0500, you wrote:
>
>Hi all.
>Having seen the latest posts on obtaining optimum performance, I was
>prompted to scetch down all of my coil info, and would be much obliged if
>someone could browse them over and point out any glaring inconsitancies. [I
>have a bad feeling about my MMC]
>
>Thanks.
>
>Xfrmr volatage: 15kV
>Xfrmr current  :  30mA
>
>Prim. Inner Diameter: 12" - 3" clearance per side << error here?
>Prim. Coil turns       : 16
>Prim. dist b/w turns  : 1/2"
>
>Primary cap size: 0.00627ufd
>
>Secondary Coil Diameter: 6"
>Secondary Turns: ? [My arms were aching too much to count :P]
>Secondary Coil Length: 24"
>Wire Guage: 22AWG 
>[.:. ~814 turns? that was a quick calculation]
>Height of first turn aboive primary: 2"
>
>I have two Toroids, I had some spare ducting, so i made another. I'll write
>the info of the large one first, then the second.
>
>Terminal Diameter: 22"
>Inner Diamerter   : 16"
>Height above Primary: 34"
>Height above Secondary: 9"
>
>2nd Toroid:
>Diameter: 14"
>Inner     :   4"
>Height above primary: 30"
>Height above secondary: 5"
>
>SparkGap type: Static.
>No. Gaps: 12
>Tapped: 5 [Untill I get new resistors]
>
>That's it! There's something to sink your teeth into.
>
>I think I can see some of the glaring errors, eg: Primary inner diamter,
>toroid height above primary [and secondary], and maybe my caps.
>
>Thanks very much for your help,
>Simon
>