[Amps] al80a

[Alek Petkovic]

Give it a good thump while it's hot. You've got nothing to lose.

73, Alek
VK6APK



At 08:20 AM 02-08-02 -0400, you wrote:
> >From Steve's comment , I went back and ran the same test on the tube in the
>upright, vertical, as it would be in the amp,    position.!!  the result was
>the same. 20-25 ohms as soon as the filament warmed up. !!
>   carl / kz5ca
>----- Original Message -----
>From: "Steve Thompson" <g8gsq@qsl.net>
>To: "'Amps'" <amps@contesting.com>
>Sent: Friday, August 02, 2002 1:47 AM
>Subject: Re: [Amps] al80a
>
>
> >
> > -----Original Message-----
> > From: carl seyersdahl <carlseye@tampabay.rr.com>
> > To: 'Amps' <amps@contesting.com>
> > Date: 01 August 2002 23:46
> > Subject: [Amps] al80a
> >
> >
> > > In my FWIW dept. I looked over the entire amp and didn't find anything
>of
> > >conncern. I did find a burned resistor which turned out to be in the
> > >external 12vdc line. , but no burned bandswitch contacts, no evidence of
> > >anything unusual, but still I knew something was wrong.
> > > I tried something interesting , tho, I took the tube out and laid it on
> > the
> > >bench and hooked up the filament with jumpers , connected the ohmeter
> > >between the fil and the grid and when I fired it up, there it was, about
>30
> > >ohms between the two terminals
> > A genuine question on my part, not meant to appear critical of Carl in any
> > way.
> >
> > You described the tube as 'laid' on the bench - if this is on its side
> > rather than standing up, will the filament sag and short when it is
>powered
> > up regardless?
> >
> > Steve
> >
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>
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