Re: VTTC question

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: FutureT@xxxxxxx 

In a message dated 7/13/05 8:20:33 PM Eastern Daylight Time, 
tesla@xxxxxxxxxx writes:


> Hi all,
>
> I have a VTTC in which I am using a GU-81M pentode. I figured since I only
> have one I should get a backup tube just in case. So I found another GU-81M
> on ebay and it was supposidly new, so I bought it. Tonight when I went to
> try it out on the coil there is no breakout and a very little spark when I
> touch a screwdriver to it. My question is: could the tube have slightly
> different ratings so that tuning the coil would correct the problem or is my
> new tube actually used and at the end of its life?


Matt,

my guess is the new tube is defective in some way.  either
worn out or just defective.  generally the ratings should be
very close in the tubes I work with.  I would doubt the tube
you mention wuold have such sloppy specs, but who knows?

John