[Amps] Tetrodes

[R@contesting.com]

On Jul 12, 2005, at 3:04 PM, Ian White GM3SEK wrote:

> R wrote:
>
> A great deal, but I don't have time to trade the same old one-liners
> with him, yet again.
>
> However, the following are genuine questions so I'll try to answer 
> them.
>
>>> This is a deposit of chemically active metal,... ...  In larger
>>> transmitting tubes the
>>> getter is usually something like zirconium, which needs a higher
>>> temperature to function correctly.
>>
>> Does zirconium gettering take place at room temperature?
>
> The gettering (adsorption) reaction that traps the gas goes faster at
> higher temperatures. Gettering by zirconium does take place at room
> temperature, but at a very slow rate.

Story adjustment time.
-  If zirconium gettering takes place at room temperature, then tubes 
that are stored at room temperature should exhibit less and less 
leakage -- which is undoubtedly not the case.
>
> To complete the story, ...

enough