>
>I have seen and used Teflon in many high power HF amps.
>It has good D factor numbers, and is easy to groove and tap.
>Henry uses Teflon in all their high power industrial RF generators
>that run continuously, 8 hrs per day; and most of their ham amps.
>Creative Electronics also uses it.
>
>G-10 fiberglass is almost as good, but will usually not survive a
>choke fire. (melts)
>
The key to surviving a choke fire is to unkey promptly. I had a G10
choke fire in my 8169 amplifier that it caused a stentorian arc to the
roof of the rf deck The G10 discoloured a bit but did not burn. I
removed the crispy-crittered turns. The choke resonance moved up and the
amplifier exhibited a gain of 65. .
My main objections to Teflon are lack of rigidty, cold flow, and
phosgene. The D-factor is wonderful.
>
cheers, Phil.
- Rich..., 805.386.3734, www.vcnet.com/measures.
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