Tubes Asylum

RE: Milky white cloudiness behind silver getter flashing = bad tube?

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6bq5

In Reply to: RE: Milky white cloudiness behind silver getter flashing = bad tube? posted by Funky Bob on August 15, 2024 at 08:27:57

If the vacuum is gone, there will be NO silver from the getter flash.
It will all be white/grey

a white-ish film on the inside of the flash area is a sign of age, as Sondek said-
not bad, per se, but getting towards the end of life...
Happy Listening

Follow Ups:

How about white-ish coating on mica spacer? - Funky Bob 03:30:54 08/16/24 (0)
Like this one? Is it another sign of the tube is near the end of life? The tube in the picture still sounds nice though. Thanks.
RE: Milky white cloudiness behind silver getter flashing = bad tube? - Byrd69 10:49:43 08/15/24 (0)
I see a lot of this on Sylvania 6SN7s. Don't know if it's the same thing. Sometimes it's quite evident, other times just a bit showing along the edge of the flash.

Your interest may vary but the results will be same. (Byrd 2020)

I can't compete with the dead. (Buck W. 2010)

Cowards can't be heroes. (Byrd 2017)

Why don't catfish have kittens? (Moe Howard 1937)

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