I have same problem with GU-80, I am taking car 40A battery, plus cable
attach to control grid, and filamen lead attach to minus and short it only
for a second. I think this is a gambling way, probably in some case you can
loose your filamen at all, but I have try this and it's work.
Firson - yd1bih
>From: "Bruce Plantin" <plantin@tcomlp.com>
>To: amps@contesting.com
>Subject: [AMPS] Tube Shorting
To: <amps@contesting.com>
>Date: Tue, 20 Mar 2001 10:42:49 -0500
>
>
>Hi all,
>I have a expensive tetrode with low hours. The control grid appears to be
>shorting to the filament on occasion, almost distroying my grid current
>meter (meter reads far beyond zero). If B+ is on, Ip of course jumps sky
>high.
>Are there any 'magical cure techniques' available that I could try?
>Obviously I could junk the tube or save for a rebuild.
>
>Regards,
>Bruce
>
>
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>
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