[time-nuts] beryllium oxide

[Dr. David Kirkby]

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