Re: [TCML] H/D Question

[futuret@xxxxxxx]

At my website, you can see my TT-42 coil which gives
42" sparks using a 12/30 NST.  The coil has a 4" x 19"
secondary wound with 1300 turns of 28awg magnet wire.
The coil uses a synch rotary gap running at 120 bps.  The
tank capacitor is LTR at 0.0142uF or so.  The toroid is
4" x 13".   The primary is just 10awg gray telephone
ground wire.  This is an example of how a synergistic design
will maximize coil performance.

 http://futuret.110mb.com

If you use a small cap with a close-set static gap to limit
your spark output, then your coil design can work and
survive, but it will never be very efficient in the sense that
it will not produce long sparks.

John
--


On Sat, Dec 6, 2008 at 12:44 PM, H.S. J. <hsheltonj@xxxxxxxxx> wrote:

> On a smaller lower powered coil (4", 15kv, 30ma) is it necessary to 
keep
> that 1:4/1:5 H/D ratio?  I designed one thats had a H/D of 1:2.75.  
Would I
> be running into any issues?




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