Marco IK1ODO wrote:
Robert,
Some power tubesmay use it internally.
As far as I know, from many discussions with power tube
manufacturers, no power tube uses beryllia, except for that
conduction-cooled Eimac tubes. It's simply not needed.
Other tubes (not power ones) may be different, but I never heard of
any beryllia in them.
Marco IK1ODO / AI4YF
I believe some of the bases for the conduction cooled tubes use BeO too.
I might be wrong on this. I have a few sitting in the garage somewhere.
I doubt there is any point having it inside air/water/vapor cooled tubes
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