[Amps] Glass envelope

[GGLL]

k7fm escribió:
> "Sorry if this is a silly question, but, which is the criteria for sizing
> (mainly its diameter) glass tubes envelope?. One can see a glass 
> envelope in
> an 813 tube relatively near the plate electrode, but for 3-500z or RS-1019
> tubes, those are fat indeed. TIA"
> 
> I am speculating, but - tubes that run red or white have more spacing 
> between the plates and the glass.  304TL, 75T and 3-500Z tubes run at a 
> higher temperature and the plates need to be further away from the glass.
> 
> Now, the next question is - if a one vacuum tube has more volume inside 
> than another, does it have more or less vacuum?

Does it still has nothing?. So it must be equal regardless inside volume.

Best regards
Guillermo - LU8EYW.

> 
> Colin  K7FM
>