Building Transformers

From:  Steve Z [SMTP:zoidspc-at-erols-dot-com]
Sent:  Monday, June 15, 1998 6:57 PM
To:  tesla-at-pupman-dot-com
Subject:  Building Transformers

I built 2 transformers for my 2.5 kw coil and they work fine
The figures  I saw in my studies regarding cross section of the core
referred to watts per square inch and didn't worry about flux per se.
200 watts per in. sq. is a reasonable figure to use. Another useful 
figure is to assume .25v per in. sq. per turn. In my case the center post 
on my cores were 5 in. sq. I used 120 t on the primary (.2v/t/in. sq)
and 8000t on each secondary. With the ballasting loss included I get 
about 12kv with both transformers in series and well over 2kw total.
The transformers don't warm up at all during a typical run of 1/2 min.
Hope this helps.
                                      Steve Z