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Re: [Amps] AL-80B Trouble

To: "Mike Schlamp" <w5cul@sbcglobal.net>, <amps@contesting.com>
Subject: Re: [Amps] AL-80B Trouble
From: "Tom W8JI" <w8ji@w8ji.com>
Date: Fri, 25 Aug 2006 20:17:00 -0400
List-post: <mailto:amps@contesting.com>
>      ASSUMPTION:  The  3-500ZG has a short, and or the 
> tube is not receiving the proper bias voltage  during off 
> periods .  The glowing while  in standby is due to the 
> current draw across the plate; dissipating ~400W.

Sounds like a grid/ filament short. As others have said, 
that was pretty common  with Amperex 3-500Z's.

73 Tom 


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