Bart's Coil Design (was flashing vs. whatever)

• To: "'Tesla List'" <tesla-at-poodle.pupman-dot-com>
• Subject: Bart's Coil Design (was flashing vs. whatever)
• From: Tesla List <tesla-at-stic-dot-net>
• Date: Thu, 27 Nov 1997 09:27:34 -0600
• Approved: tesla-at-stic-dot-net

From: 	Malcolm Watts[SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent: 	Thursday, November 27, 1997 12:49 AM
To: 	Tesla List
Subject: 	Bart's Coil Design (was flashing vs. whatever)

Hi Bart,
         I have one comment to make on your design.....

> From:   Barton B. Anderson[SMTP:mopar-at-mn.uswest-dot-net]
> Sent:   Tuesday, November 25, 1997 10:24 AM
> To:     Tesla List
> Subject:    Re: flashing vs. whatever
> 
<pretty large snip>
> 
> Bert,Yes, it's a large value cap! Here's my project: (100KHz, 17KW)
> 
> Items completed:
> Secondary: 12.5"OD, 33.2" H. 783 turns. #18 polythermalese magnet wire (1/4
> Wave of 2460ft).
> Primary: Flat pancake 3/8" soft copper tubing. Currently 8 turns (may be
> expanded), 3/8 spaced, 23" OD. Adjustable up/down first winding of sec. by 9
> inches each direction.
> X-Former: Pole Pig 14.4K, 240, 10KVA, 1 Ph.
> Toroid: 8 x 30".
> 
> Not completed or attained:
> Cap: 0.256uF (Just now starting to seriously think about this design)


Whoa!! IMHO your secondary is *far too short* for the voltage that 
your primary energy will develop in it!!! Go for a *much* smaller cap 
and higher primary inductance.  I wouldn't build a secondary less 
than ten feet high for that cap value. I might be shot down in flames 
by coilers who have built such high energy coils but I'm placing my 
bets.
     What size toroid are you contemplating using?

Malcolm
<snip>

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