Really? Interesting. Just FYI, Kapton insulated wire was removed from ALL
military aircraft after some very impressive tests were done showing how it
tended to blow and burn under certain conditions. Of course, that was the
Kapton insulated wire. I know zip, nada, ZERO about the tape. Possibly it
is A-OK.
v/r,
Mark Bitterlich
WA3JPY
----- Original Message -----
From: "Bryan Swadener" <bswadener@yahoo.com>
To: <amps@contesting.com>
Sent: Monday, March 31, 2014 7:18 PM
Subject: Re: [Amps] L4-B
Also, Kapton(tm) aka polyimide tape will work FB.
It works well at high temperature and high voltage.
vy 73,
Bryan WA7PRC
--------------------------------------------
Date: Sun, 30 Mar 2014 23:07:13 -0500
From: Edwin Karl
To: amps@contesting.com
Subject: [Amps] L4-B
Just be very careful with the power resistors used in the
bias cutoff/
bleeder
They are mounted on long screws that run through the center
of the
resistor. In
repairing an amplifier for a buddy, I had the resistors
short through the
porcelain of the resistor.
The fix is use good 3m glass tape to insulate the screw, and
enough on
the ends to insure centering the resistors. Unlike
electrical tape,
glass tape
is rated at 240 degrees and will withstand the high heat.
Make sure to
reinstall
the mica insulators.
Good Luck!
We're all counting on you ...
73
Ed K0Kl
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