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primary hold down's




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From:  RODERICK MAXWELL [SMTP:tank-at-magnolia-dot-net]
Sent:  Monday, March 09, 1998 8:43 PM
To:  Tesla List
Subject:  Re: primary hold down's

Tesla List wrote:
> 
> ----------
> From:  Esondrmn [SMTP:Esondrmn-at-aol-dot-com]
> Sent:  Monday, March 09, 1998 3:23 PM
> To:  tesla-at-pupman-dot-com
> Subject:  Re: primary hold down's
> 
> In a message dated 98-03-07 07:25:50 EST, you write:
> 
> << ---------
>  From:  Walt Kulpa [SMTP:gwkulpa-at-earthlink-dot-net]
>  Sent:  Friday, March 06, 1998 12:27 PM
>  To:  tesla-at-pupman-dot-com
>  Subject:  primary hold down's
> 
>  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
>   >>
> 
>


   You might want to try the method I used. I cut short pieces of 3/4"
dia. acyrlic tubing to use as hold downs, then bonded them into place
with Methylene Chloride adhesive. I fed the copper tubing through each
piece and then glued it into place on the plexiglas strips mounted on
the coil form. You can see how I did it on Chips webpage under new coil
pictures. The process was rather tedious but it worked out well, and is
very sturdy.



                                 Frankensteins Helper
                                         Max