It depends! There are certain tubes, like the 3-500Z, that are notorious for
losing vacuum. But, I have quite a number of glass tubes that were
manufactured in the 1920s that are still fine.
The ceramic tubes haven't been around as long as glass tubes. But, those that
I have, are still fine. Glen, K9STH
Website: http://k9sth.net
From: Bill Turner <dezrat@outlook.com>
To: Amps group <amps@contesting.com>
Sent: Wednesday, November 26, 2014 10:08 AM
Subject: [Amps] Holding a vacuum
I'm curious as to your experiences with tubes in long term storage.
The question is, which type holds a vacuum better - glass or ceramic,
or is there no difference?
My own limited experience says ceramic is better, but that is only
with a few tubes.
All comments welcome.
73, Bill W6WRT
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|