Re: COIL FORM FOR MONSTER BL COIL

To: tesla-at-pupman-dot-com
Subject: Re: COIL FORM FOR MONSTER BL COIL
From: Jim Lux <jimlux-at-jpl.nasa.gov> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
Date: Tue, 22 Sep 1998 21:30:06 -0600
Approved: terryf-at-verinet-dot-com

> 
> 
> I'd use this technique again but would cut out little half round indexes
> for the vertical pipes to seat (nice idea).

Use a hole saw before you cut the big circle out of the sheet of
plywood. When you cut the big circle, the almost half rounds will be
just right.
> 
> I've had no leakage problems with the black ABS pipe I employed but
> would suggest, as in any HV application, testing the proposed plastic
> for leakage losses first before committing it to your project.

I'd use PVC, just for structural reasons. ABS DWV pipe is actually foam
core with a hard surface and is easily deformed.  Don't forget that if
you put 1000 windings at 10 pounds tension on, you are talking about a
total load of 10,000 pounds. It is easy to inadvertently collapse your
form when doing big wraps.