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[AMPS] Key down time

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Subject: [AMPS] Key down time
From: (Bill Turner, W7TI)
Date: Tue, 10 Mar 1998 08:35:30 GMT
On Mon, 9 Mar 98 13:46:32 -0600, Jon Ogden <> wrote:

>In regards to key down time on amplifiers:
>I believe any amplifier can run keyed down indefinitely given:
>1.) Proper cooling of the tube to keep it within temp limits
>2.) Heavy duty enough power supply (the tube isn't the only thing getting 
>If these two things are done, then there is really no reason why the amp 
>can't be run continuously.
Actually, there's one more.  Proper cooling of the tank coils.  I had
a well-known "legal limit" amplifier melt down the 80/160 meter tank
coil on me not once but twice.  It is now gone, replaced with a 91B.
No more problems.

73, Bill W7TI

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