Re: [TCML] Primary Coil came up short...Is it okay?

[juliustc81@xxxxxxxxx]

Ok cool I wil get more coil...hopefully I will have 80% of this completed by end of the week  and take pics of it...I just need it to function right now...but safely obcourse..I'm pressed for time and work and school is not helping. :) imma throw a jacobs ladder in there as finale... try make a 2 for 1 deal 
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-----Original Message-----
From: Scott Bogard <sdbogard@xxxxxxxxx>
Sender: tesla-bounces@xxxxxxxxxx
Date: Tue, 27 Jul 2010 21:18:51 
To: Tesla Coil Mailing List<tesla@xxxxxxxxxx>
Reply-To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Subject: Re: [TCML] Primary Coil came up short...Is it okay?

Hi Julius,
	Short answer, if you are building the secondary I designed for you, no, 
it won't be able to tune unless you radically alter capacitance beyond 
may be economical (70 nf.)  Most likely your NST won't charge one that 
big.  The long answer, you can make any inductance work with any given 
system (within reason) by tuning with capacitance, this is how Tesla did 
it, he used 1 turn primaries and tuned by adding capacitance.  Lower 
primary inductance theoretically gives higher voltage, but what time has 
taught us is that energy is more important than voltage for making 
sparks (which is why we use massive top loads which reduce voltage) and 
using bigger inductances in the primary reduces heat losses in the spark 
gap and primary coil, saving energy at the cost of voltage.  Buy more 
tubing, and solder it on just like it was plumbing.

Scott Bogard.

On 7/27/2010 7:39 PM, Julius Crummer wrote:
> Ok i just bought some 1/4" copper tubing for the primary coil...now i started it
> off at a 4" diameter and with 1" spacing im only able to make about 7 turns. I
> will be working with a 6KV/60A NST. will this primary coil be good enough or do
> i need additional copper tubing???
>
>
>
>
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