[Amps] 3CX800A7 Spares - cook them periodically?

[Carl]

Im not aware of any outgassing problems from those tubes but a yearly swap 
wont hurt anything either.

Carl
KM1H




----- Original Message ----- 
From: "bob" <n612dw at gmail.com>
To: <amps at contesting.com>
Sent: Sunday, July 13, 2014 11:21 PM
Subject: [Amps] 3CX800A7 Spares - cook them periodically?


> Hi all,
>
>
>
> Have some NIB Eimac 3cx800a7's (YC-238) as spares for my Alpha amps.
>
>
>
> Question is, should they be put in some kind of fixture and cooked with
> air/filament v applied periodically to keep the boogymen away ?   Is
> filament and airflow all that is needed to periodically "condition" them?
> Or is this all hogwash?
>
>
>
> If there is any way to preserve them in storage I'm game as they seem to
> last forever if properly used - so a long time in storage is probable.
>
>
>
> Do these external anode tubes tend to leak any more than other types ?
>
> How does the "getter" work on these suckers (if any exists)?  Do they need
> to get equivalent to red hot like the 3-500z's to have the getter work?
>
>
>
> What has to be applied to keep them healthy ?
>
> Anyone have a schematic for a burn in fixture?
>
>
>
> Read some contrary opinions leaving me with only question marks in my 
> skull.
>
>
>
> -bob, w9zv
>
>
>
>
>
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