Pancake Primary (fwd)

• To: "'Tesla List'" <tesla-at-pupman-dot-com>
• Subject: Pancake Primary (fwd)
• From: Tesla List <tesla-at-stic-dot-net>
• Date: Thu, 19 Feb 1998 23:05:08 -0600
• Approved: tesla-at-stic-dot-net

----------
From:  Jim Fosse [SMTP:jim.fosse-at-bjt-dot-net]
Sent:  Thursday, February 19, 1998 5:02 PM
To:  Tesla List
Subject:  Re: Pancake Primary (fwd)


>From:  SBJohnston-at-aol-dot-com [SMTP:SBJohnston-at-aol-dot-com]
>Sent:  Wednesday, February 18, 1998 2:49 PM
>To:  tesla-at-pupman-dot-com
>Subject:  Re:  Pancake Primary (fwd)
>
>
>
>Jim wrote:
>
>>Also check out your local supper market for 3/8" to 1/2" HDPE
>>cutting boards - about $8 (U.S) for a 16" by 12" sheet. 
>>Use a hot glue gun to tack the "wire" into place. 
>
>A neat idea, but my coil is too big to benefit from just one.  Maybe I could
>place 4 of them at the 90 deg points for support of the larger primary...
>
>My calculations (considering .01 uF as the favored capacitor value for my
>xfmr) lead me toward 15 turns, 10" of windings, inner one 20" diameter, outer
>one 40", for a value of about 220 uH - plenty of room to experiment up and
>down in frequency.
>
>
Steve,
	I'm sorry for not explaining my method completely. I cut the
board into 2" wide strips which were then slotted on the edge to hold
the wire. These were then hot glued on edge at the 90 degree points.
My current primary has 40 turns of #12 starting at 10" diameter and
space wound 0.5" on center. That makes the overall primary form 42" in
diameter.

These cutting boards are available in 16" by 22" sizes for ~$12 at
Smart and Final or other restaurant supply houses.


	jim

• Prev: Can you have too much air through a SG? (fwd)
• Next: Skin effect and aluminum question (fwd)
• Index(es):
  • Main
  • Thread