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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Re: "Disappearing" Getter Question posted by stellavox on March 22, 2006 at 06:08:44:
The actual getter is a small ring or structure in the tube which is filled with a metal (usually Barium) and then heated to a very high temperature causing a flashing of the getter material. The silver coating you see inside a tube is the result of this operation. The flashing is consumed by the residual air and other gases in the tube left over from the original evacuation as well as the additional ones produced from operation.The amounts of flashing present does not necessarly determine whether a tube is good or bad. I have several Tung-Sol 6550's with almost no flashing left and they still test nearly new and sound fine. However, tube life is not exactly linear, so it can mean the tube is nearer the end of its usable life.
Hope this helps…Jim, I'm sure could add to this.
Regards,
"Kico"||||||||||/
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- Not Jim, but... - Kico 07:01:03 03/22/06 (0)
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