[AMPS] coil form plastics

[Richard W. Ehrhorn]

Ian..

Catalogs from U.S. sources such as Dayton Plastics, Regal Plastics and 
Cadillac Plastics (and probably scores more by now) listed "glass-filled 
Teflon." I've never tried it.

In a similar vein, the very common transformer insulation Nomex* (DuPont, 
nylon-based I believe) also is available mica-filled, which has better 
characteristics for some applications - (high temperature?) - but don't 
remember whether the difference is physical stability or dielectric 
strength/corona resistance or both.

73,   Dick

-----Original Message-----
From:	Ian White, G3SEK [SMTP:G3SEK@ifwtech.demon.co.uk]
Sent:	Sunday, February 14, 1999 5:18 PM
To:	amps@contesting.com
Subject:	Re: [AMPS] coil form plastics


Carl wrote:
>
>
>
>On Sun, 14 Feb 1999 11:28:09 +0000 "Ian White, G3SEK"
><G3SEK@ifwtech.demon.co.uk> writes:
>
>SNIP >> snip>>>
>>

>Soft Teflon makes a poor choke form but hard Teflon works quite well. I
>believe it has a fiberglass mixture. Machines well and costs less than
>pure Teflon.

Any brand names and sources?

73 from Ian G3SEK          Editor, 'The VHF/UHF DX Book'
                          'In Practice' columnist for RadCom (RSGB)
                           http://www.ifwtech.demon.co.uk/g3sek

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