Re: Secondary coil form questions

• To: tesla-at-pupman-dot-com
• Subject: Re: Secondary coil form questions
• From: Malcolm Watts <MALCOLM-at-directorate.wnp.ac.nz>
• Date: Fri, 14 Feb 1997 07:36:14 +1200
• Subscriber: MALCOLM-at-directorate.wnp.ac.nz Thu Feb 13 22:00:05 1997

Hi Roderick,
               If it is any help, I constructed a 17" coilform using
1/8" thick polyethylene sheet (welded seam with hot melt). I built a
ribbed structure from acrylic strips to support it. It did bow 
slightly with the winding pressure. I had to set up a large lathe with
a free standing wheel beyond the end to support the form while 
winding.

Malcolm

<snip>
>   Does anyone know of any companies that sell polystyrene tubing larger
> than four inches in diameter? My first coil has a styrene secondary and
> I really like its performance.For my next project I'm going to build a
> smaller coil that will resonate at about 1Mhz. But in the future when I
> get more space to build and operate my coils I would like To build A
> MONSTER! I like the fact that styrene has such low losses in the RF
> range, it is hard, rigid, tough, and coatings stick to it well. The the
> only problem is I can't find any in a large enough diameter. If anyone
> knows of such a company the information will be greatly appreciated!
> 
>                       
> 
>                                 Frankensteins Helper
>                                        Max
> 

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