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Re: VTTC question



Original poster: Liviu Vasiliu <teslina@xxxxxxxxx>


Probably the tube is defective, the difference is too big.


vasil > > --- Tesla list <tesla@xxxxxxxxxx> wrote:

> Original poster: robert heidlebaugh
> <rheidlebaugh@xxxxxxxxxxxxxx>
>
> Matt: Everry time I change tubes in my VTTC I must
> re tune the feedback
> and the the bias level
> Robert H
> --
>
>
> > From: "Tesla list" <tesla@xxxxxxxxxx>
> > Date: Thu, 14 Jul 2005 11:20:11 -0600
> > To: tesla@xxxxxxxxxx
> > Subject: Re: VTTC question
> > Resent-From: tesla@xxxxxxxxxx
> > Resent-Date: Thu, 14 Jul 2005 11:26:45 -0600
> (MDT)
> >
> > 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
> >
> >
>
>
>