Ian White GM3SEK escribió:
> GGLL wrote:
>
>>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.
>>
>
>
> Nothing?
>
> Tubes are typically pumped down to about 1E-8mmHg, which means that the
> "vacuum" space of an amateur-sized transmitting tube will contain well
> over a million free gas molecules.
Well, I ignored that and simplified things also; then, after "vacuum
process", and to "kill" those over a million molecules tube's manufacturer
use the getter method?.
Best regards
Guillermo - LU8EYW.
>
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|