Re: viynl instead poly

To: "'Tesla List'" <tesla-at-poodle.pupman-dot-com>
Subject: Re: viynl instead poly
From: Tesla List <tesla-at-stic-dot-net>
Date: Sat, 15 Nov 1997 23:23:06 -0600
Approved: tesla-at-stic-dot-net


From: 	Thomas McGahee[SMTP:tom_mcgahee-at-sigmais-dot-com]
Sent: 	Saturday, November 15, 1997 9:39 AM
To: 	Tesla List
Cc: 	rchowes-at-email.msn-dot-com
Subject: 	Re: viynl instead poly


> From: 	Raymond C. Howes[SMTP:rchowes-at-email.msn-dot-com]
> Sent: 	Friday, November 14, 1997 8:37 PM
> To: 	Tesla List
> Subject: 	viynl instead poly
> 
> Does any one know anything of viynl plastics?
> Here in Florida they use it to enclose screen porches. It's pretty thick  at
> least 1/16 thick.Realy stretchable. I haven't been able to find anything
> about it from the manufacturer except the thickness and how long it stays
> flexible,years in the sun.
> Just wondering if it could be used in building caps?
> 
>                                 rchowes-at-msn-dot-com  any thing on the subject
> would be appreciated.
> 
> 
Raymond,
Vinyl is abominable for TC work. Stick with polyethelene, polypropylene,
and styrene. Vinyl, plexiglass, mylar, all these have fairly good DC
characteristics, but at the frequencies encountered in TC work these
materials overheat tremendously. The heat represents power loss. That is
bad enough in itself, but the heat is also dangerous as it causes
the dielectric to degrade and fail. Usually in flames of some sort.

Hope this helps.
Fr. Tom McGahee