On Sunday 14 September 2003 07:07, Neil Carr wrote:
> I have acquired various lengths and diameters from ¼" to 1" Tufnol rod. I
> plan on using it to wind my anode choke and at HV stand-off points.
>
> Although I see a number of articles (here in Europe) suggesting PTFE or
> Tufnol maybe used in the applications mentioned, I rarely see anyone using
> Tufnol.
Tufnol is a trade mark, don't know whose.
Generically it appears to be woven fabric encased in some sort of resin. There
appear to be a number of grades, some with defined fabric and epoxy resin,
some with undefined fabric and phenolic resin (close to Paxolin I imagine).
Certainly the latter shouldn't be used anywhere near rf or high voltage -
it's hygroscopic and I've seen several instances of fires where it's gone
conductive.
Steve
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