kingwood wrote:
>
> As I recall, EIMAC' s "Care and Feeding of Power Grid Tubes"
>says that the getter material, if any at all, is in the cathode
>(filament) of the tube, not the anode. It is the heating of the
>filament, containing the getter material, that causes internal gas to
>be ionized, emulsified, and bonded back into the metal of the anode
>(plate) of the tube. This is why an operator can "burn" the gas out of
>an EIMAC tube, but can not, in tubes like the Penta Labs PL-172, which
>has no getter material.
>
> With this in mind, the color of the anode (plate) of the tube
>has nothing, or very little, to do with "getter action",
In almost every detail, that is flat-out WRONG.
The AMPS archives contain plenty of accurate information on the subject
of getters. Simply go to
<http://lists.contesting.com/archives//html/Amps/> and type "getter"
into the search field.
--
73 from Ian GM3SEK
http://www.ifwtech.co.uk/g3sek
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