Homemade Trasformer

To: tesla-at-pupman-dot-com
Subject: Homemade Trasformer
From: ross andrews <sflourine-at-home-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
Date: Sat, 12 Feb 2000 21:31:03 -0700
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme



	Hi all,

	--This is prolly about the thousanth time this has come up on the list,
but a few more posts can't hurt--
	
	I am thinking of building my own transformer for my coil - not that I
belive it'll be close to as good as a pig, but want to do it myself
(yeah, i'm nuts).  I found dad's old EE book and ran the numbers, and I
should only need 120 turns in the primary to choke the 240V/60hz mains
current (as long as the core is bigger then 14 in^2), and 6000 or so
turns in the secondary to give 12 kV.   So far, I have found that the
biggest problem is the core -- I don't think it can just be a piece of
barstock b/c it seems like it will saturate really easily -- is this
right?  Also, eddy current and hysterysis (spelled wrong) are less in a
laminated core, so I pulled this out of my shorts:  How about using many
small metal "dowels" and coating them with a sealer of some sort (will
polyurethane stick to metal??), then sticking them all together.  What
you have now is a neat little bundle of rods - wrap the primary and
secondary, then bend the whole mess around a garbage can to form a
toroidal shaped tranny.  It seems like this should work.  Will it?  	

	Any comments apprecited.

	Thanks,

	Ross