Re: Primary Coil Shape

• To: tesla-at-poodle.pupman-dot-com
• Subject: Re: Primary Coil Shape
• From: Tesla List <tesla-at-stic-dot-net>
• Date: Sat, 26 Apr 1997 08:50:32 -0500
• Approved: tesla-at-stic-dot-net

Subject:   Re: Primary Coil Shape
  Date:    Fri, 25 Apr 1997 12:00:17 -0400 (EDT)
  From:    Esondrmn-at-aol-dot-com
    To:    tesla-at-pupman-dot-com


In a message dated 97-04-25 04:01:51 EDT, you write:

<< 
 I have been reading this list for quite a while now, and am getting
 ready
 to start building a new coil.  My first (and probably biggest) question
 so
 far is what shape of primary should I use as a beginning?  Also, I saw
 in
 one magazine (Popular Electronics?) while I was still in High School,
 that
 one made a TC with a square primary, flat rolled.  Would this work
 better
 or worse than a round flat and/or cylindrical wound coil?
 
 LT
  >>

LT,

Based on my experience, and recent testing posted here, I would suggest
a 14
turn primary made with 1/4" copper tubing with 1/4" spacing.  This would
be
for a small to medium coil up to say 1500 watts input.  I would also
incline
the primary about 10 to 15 degrees which raises up the outside few turns
to
make tuning easier and increases coupling without getting the outside
turns
too close to the top of the secondary.

Ed Sonderman

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