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primary hold down's
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To: "'Tesla List'" <tesla@pupman.com>
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Subject: primary hold down's
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From: Tesla List <tesla@stic.net>
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Date: Mon, 9 Mar 1998 15:43:16 -0600
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Approved: tesla@stic.net
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From: Gary Lau 09-Mar-1998 0735 [SMTP:lau@hdecad.ENET.dec.com]
Sent: Monday, March 09, 1998 6:50 AM
To: tesla@pupman.com
Subject: primary hold down's
>From: Walt Kulpa [SMTP:gwkulpa@earthlink.net]
>Hi, I'm working on the form for my 1/4" refigerator tubing primary.
>I'm planning on using 1/4" polycarb for the support fins. I've got the
>calculations made on where to notch the plasitc in order to create a
>nice uniform 30degree slope and 15 degree rise with 1/4" spacing
>between turns, but what I don't have is, what can i do for holding the
>tubing into the notches? I don't want to just let it lay there, do I?
>I'm not so sure that adehesive is a good idea, is it? How is holding the
>tubing into the plastic commonly done?
>Thanks, Walt Kulpa
I built my support fins out of 3/8" Lexan. I drilled and tapped holes,
4 per fin, between the notches, for 6-32 nylon screws, and held the
tubing down with a strip of 3/8" wide x 1/16" thk Lexan. You could
probably do it in 1/4" wide stock too.
Definately don't use adhesive!
Gary Lau
Waltham, MA USA