Re: Please Help me design primary

To: tesla-at-pupman-dot-com
Subject: Re: Please Help me design primary
From: Brent L Caldwell <stretchmonster-at-juno-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
Date: Sat, 08 May 1999 22:34:43 -0600
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme



All coilers:

	My unfinished TC needs a new primary.  The old one was an inverted cone
of copper tubing.  But I think I need more turns and the cone is almost
half way up the secondary already.

	Here are my specs, first:

Secondary:
	4" diameter pvc pipe.  From 1st wrap to final wrap is about 24".  Used
.01" diameter magnet wire (whatever gauge that is, I forgot).

And here's my plan for new primary:
	A 6.5" diameter drum will have about 6 or 7 wraps with 22 gauge
insulated stranded wire.  Then, the rest will be a flat spiral of copper
tubing, with 7 more turns.

Will the 6.5" diameter be too tight?  I think so, but I'm not sure.  I
need it because I don't have that much copper tubing and I need some way
to take up the extra length of primary.  Also, I don't have much money to
spend on this.  And how much spacing between turns on both parts?

Here's the rest of my coil:

X-former:  15kV 60 mA.
Capacitor:  .009 uF Cap.  
Spark gap:  two nails 1/4" apart.  
		( I have a torn apart hairdryer, and I'm thinking about making it into 
		  some kind of rotary gap, but I imagine there's got to be something 
		   wrong with that. )


Any better ideas for designing the primary?  I'm open for opinions.


							Brent



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