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Re: 1500-3000 turn coils

In a message dated 9/10/00 12:15:52 AM Central Daylight Time, 
tesla-at-pupman-dot-com writes:

<<  That's normal because your coil is especially long and an inverse cone
 > primary give more coupling to the top winding. By the way  a coil with a
 > 10/1 ratio could make a perfect bipolar.
 > Luc Benard
 > >>

I have been playing with bipolar coils and I have more misadventures planned 
the winter months. Would you kindly 'splain me what the 10:1 ratio refers to?
Is that secondary length to diameter?
Thanks. Sooo much to learn.

Ralph Zekelman