>>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?
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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