I think in the Eimac white paper covering the reduced filament voltage, they
talk about the benefit being applicable to tubes with a certain ratio of
filament power to output power. Forget what that was but I seem to remember
it not being of much value, by Eimac's claim, for smaller tubes.
73/jeff/ac0c
--------------------------------------------------
From: "Bill, W6WRT" <dezrat1242@yahoo.com>
Sent: Sunday, December 20, 2009 10:13 AM
To: <amps@contesting.com>
Subject: Re: [Amps] Re GS-35B hours..
> ORIGINAL MESSAGE:
>
> On Sat, 19 Dec 2009 08:20:08 -0800, Jack Parker <vhfplus@gmail.com> wrote:
>
>>I experienced increases in
>>tube life of at least 50 percent based on comparisons to tube log records
>>when the tubes were installed and run at full voltage for the life of the
>>tube.
>
> REPLY:
>
> Later on in the tube's life, did you have to increase the heater voltage,
> or
> just leave it constant for the entire lifetime?
>
> 73, Bill W6WRT
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>
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