Re: [TCML] Toroid

[jhowson4@xxxxxxxxxxx]

Christian, 
Its not that you screwed up, your coil works just fine, just under different parameters. 
But you are correct increasing the size of the toroid, will generally produce more power arcs for a given input power. Just be careful not to go too big, i built one once that would not produce any arcs unless it had a breakout point. it did radiate a massive E feild though, I could like a florescent tube across the room. 
Increasing the smoothness of the toroid will also help you out, I find that coating the ducting in Spackle and then carefully sanding it down before applying the tape to be highly beneficial as it reduces corona points. 



Thanks, 
John "Jay" Howson IV 


"Why thank you, I will be happy to take those electrons off your hands." 

----- Original Message -----
From: "Christian Hill" <monolegal@xxxxxxxxx> 
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx> 
Sent: Monday, September 24, 2012 11:48:54 PM 
Subject: [TCML] Toroid 

Hello. I completed and ran my first Tesla coil this weekend. Putting it 
together and having it work was a very satisfying experience. I am 
not extraordinarily happy with the results, however. It is powered by three 
12kV NST's in parallel for 1.1kw of power. The coil form diameter is 4.5" 
and the winding height is 22.5". It is currently throwing several(4-7) 
small to medium size arcs. (8"-24"). A breakout point helps, but I still 
think it's under performing. 

My question is, how can I get a single larger arc? I've seen several 1kw 
coils outperform my 1.1kw coil. I spent much time on and carefully planned 
almost (read on) every piece of this coil. I have a simple adjustable 
static spark gap. I have a very close to LTR capacitor array (off by about 
1.1nf) and the coil is as tuned as it is going to get. The RF ground is 
good as well, I pounded an 8' grounding rod into the earth. 

The topload is where I think I screwed up. Not only is it rather small for 
my coil (4" ring, 16" total), it is rather poorly made. By poorly made I 
mean there are many ridges in the foil tape that is wrapped around the 
dryer duct. To get a single larger spark should I construct a larger 
topload? Or should I attempt to smooth out the edges in the foil tape? What 
size toroid would you recommend? I am considering a 4" ring x 20-22" total. 
Thank you for your help. 
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