[Amps] Holding a vacuum

[Bill Turner]

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On Thu, 27 Nov 2014 19:15:08 -0500, you wrote:

>What metric does one use to determine if a given tube holds a vacuum or not?>
>Cheers,
>
>Karin   K3UU

REPLY:

Tubes that lose vacuum draw excess anode current even when idling and
if they are glass, one can see a blue glow in between the elements
when HV is applied. 

73, Bill W6WRT