[Amps] L4-B

[Mark Bitterlich]

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 at yahoo.com>
To: <amps at 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 at 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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