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Re: Optimum coil configuration



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> Date:          Mon, 10 Mar 1997 21:40:39 -0700 (MST)
> From:          List owner <listown-at-poodle.pupman-dot-com>
> To:            tesla-at-poodle.pupman-dot-com
> Subject:       Optimum coil configuration (fwd)

> 
> 
> ---------- Forwarded message ----------
> Date: Sun, 9 Mar 1997 12:45:12 -0700
> From: Stanley Harle <lazer-at-earth.wazoo-dot-com>
> To: Tesla List <tesla-at-pupman-dot-com>
> Subject: Optimum coil configuration (fwd)
> 
> This is a forward of a message that I sent yesterday, but haven't seen
> appear on the list.
> 
> Hi y'all,
> 	I have been operating the following setup for a while now. Because
> of business trips, winter, laziness and various personal disasters, I
> haven't gotten to do as much experimenting as I'd like.  Lately, though I
> find that I'm having a bit more time to play (and it's been warmer)
> so I got to wondering about the consistently poor (in my view) performance
> that I've gotten from my coil.
> 
> 	The stats are:
> 	2 15-at-30 neons
> 	around 50 feet of 3/8" copper, 3/8" apart for primary
> 		Primary is sometimes inclined for better performance
> 	a CP .025 uF capacitor
> 	6.5" X 27.25" secondary
> 	various toroidal terminals
> 
> 	The system usual tunes at about 8.25 turns or so.  The best
> performance to date has been about 22", from the largest toroid that I
> have, about 30" X 3 made from drain duct for trailers.
> 	Would I get better performance given the power limitations that I
> have from a shorter secondary?
> 	Would a shorter secondary cause the tuning to move to less turns
> or more?
> 	
> 
> Stan Harle
> Alamogordo, NM
> 

Stan,

Just glancing at your menu the obvious thing that appears is that 
your 0.025 mfd cap is way too large (by two and a half times) for 
your neons to swing.  The biggest cap you should use on 60 mA -at-15 kV 
is about a 0.01 mfd.  I actually employ a 0.007 mfd with this 
transformer size in a small coil and get terrific results.

Good luck.

rwstephens 






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