[Amps] 2 ways of Gettering...

[Carl]

----- Original Message ----- 
From: "John Lyles" <jtml at losalamos.com>
To: <amps at contesting.com>; <amps at contesting.com>
Sent: Tuesday, September 13, 2011 3:40 PM
Subject: [Amps] 2 ways of Gettering...


> Actually the getter is there all the time and what you are speaking about 
> is how to reactivate the gettering process.
> By heating "some" metallic getters such as coated plates, they attract 
> more ions and molecules of gas in vacuum device. Running the plate with 
> color
> is risky in itself as it may liberate additional molecules from the plate 
> which then have to be absorbed. Some tubes may be
> worsened after this process.

But this doesnt apply to the ham type tubes in service today. A 3-500 doesnt 
outgas at a red color and I havent found any decrease in a hi-pot even after 
an extended bright orange.

Carl
KM1H