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[AMPS] coil form plastics

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Subject: [AMPS] coil form plastics
From: (
Date: Fri, 12 Feb 1999 17:19:16 -0500

On Fri, 12 Feb 1999 13:07:59 -0700 "John T. M. Lyles" <>


>Delrin is an acetyl resin, does make a nice 60 Hz insulator, thats 
>it. And it is quite hydroscopic to boot!
>One would be asking for big trouble to use it over a few KV of RF 
>at high frequencies I think. As you pointed out above....... how do 
>get away with using it?

MFJ owners, like Clinton supporters are known for loyalty, not brains.

OEP switched to Delrin when their ceramic core supplier raised the price.
MFJ wanted to spend less, not more so forced OEP into the Delrin fiasco.

I was told by participants that the MFJ tuner at the ARRL test actually
caught fire as did the replacement unit.  As Rich said, that never made
About a year ago, one of MFJ's contract engineers was pimped out to try
and get a name so MFJ could sue. Made a real ass of himself on various
reflectors and got shut down by all.
The ARRL participants were/are all well qualified and reputable people
and shall remain nameless.

73  Carl  KM1H

The rest SNIPPED as of no particular interest at ham power levels

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