[AMPS] Gassy Tubes and Gas Arcs

[Jon Ogden]

>>>There are two kinds of blue glow with 8166/4-1000A tubes:  Where the 
>>>electron beam strikes the glass envelope, and in the evacuated space.  
>>>The first case being normal and the second case being abnormal.
>>
>>In the evacuated space???  Isn't the whole tube evacuated?? 
>
>With luck.
>
>>  Please explain...
>
>  If one sees ionized gas, is the inside evacuated?

So then if all of the tube isn't evacuated, none of it is evacuated. 

But you said that one blue glow is from electron beams striking the 
envelope.  The other is in the "evacuated space."  How do I know which 
from which?

73,

Jon
KE9NA


-------------------------------------
Jon Ogden
KE9NA

http://www.qsl.net/ke9na


"A life lived in fear is a life half lived."


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