Well, I'll be. . . . .
Thanks for that,
Alek. VK6APK
At 12:24 AM 2/12/2010, Radio WC6W wrote:
>4-500A's will have pins 2 & 4 commoned for the screen.
>
>Note: The suppressor grid is connected to the base shell.
>
>73 & Good morning
> Marv WC6W
>
>http://qsl.net/wc6w/
>
>--- On Mon, 11/29/10, Carl <km1h@jeremy.mv.com> wrote:
>
> > From: Carl <km1h@jeremy.mv.com>
> > Subject: Re: [Amps] Help identifying tubes
> > To: "mike stokes" <mike9v@gmail.com>, "Amps"
> <amps@contesting.com>, "Alek Petkovic" <vk6apk@bigpond.com>
> > Date: Monday, November 29, 2010, 7:32 AM
> > There better not be any continuity
> > between any pins except the filament.
> >
> > If they are 5-500A pentodes, which seems most likely, they
> > also work well in
> > GG and better than a 4-400. Ive used Penta PL-175A's in a
> > fully GG SB-220
> > and they are as easy to drive as 3-500's.
> >
> > Carl
> > KM1H
> >
> > ----- Original Message -----
> > From: "Alek Petkovic" <vk6apk@bigpond.com>
> > To: "mike stokes" <mike9v@gmail.com>;
> > "Amps" <amps@contesting.com>
> > Sent: Monday, November 29, 2010 3:15 AM
> > Subject: Re: [Amps] Help identifying tubes
> >
> >
> > > You should be able to tell with an ohm meter.
> > >
> > > The filament pins are easy to identify. They are the
> > same for the
> > > triode, tetrode and pentode.
> > >
> > > If it is a triode, the 3 other pins will have 0 Ohms
> > between them
> > > If it is a tetrode, only two of the other tree pins
> > will show 0 Ohms
> > > If it is a pentode, there will be no continuity
> > between any of the
> > > other three pins.
> > >
> > > From the pics, they look like 5-500 tubes but the Ohm
> > meter should tell
> > > you.
> > >
> > > 73, Alek
> > > VK6APK
> > >
> > >
> > > At 12:09 PM 29/11/2010, mike stokes wrote:
> > >>Hi Guys
> > >>
> > >>Someone gave me 2 tubes years ago and said they
> > were 3-500s. Well I am
> > >>not
> > >>sure they really knew, and I don't know as the
> > lettering is worn off.
> > >>Here
> > >>is a link with some pics.
> > >>
> > >>http://picasaweb.google.com/mike9v/Tubes#
> > >>
> > >>The one on the left is an Eimac. It end in an
> > A and has S4 7704
> > >>stamped
> > >>inside.
> > >>
> > >>The one on the right is a Westinghouse and looks
> > like it says 5/5xxA where
> > >>the x in worn and illegible.
> > >>
> > >>Any ideas on what these really are ? Or what
> > is a good way to figure it
> > >>out
> > >>?
> > >>
> > >>Any help is appreciated.
> > >>
> > >>--
> > >>Mike Stokes
> > >>KK9V
> > >>_______________________________________________
> > >>Amps mailing list
> > >>Amps@contesting.com
> > >>http://lists.contesting.com/mailman/listinfo/amps
> > >
> > >
> > > http://www.qrz.com/db/vk6apk
> > > http://www.qrz.com/db/vk6ap
> > >
> > >
> > > _______________________________________________
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> > > Amps@contesting.com
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> >
> > _______________________________________________
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> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
> >
>
>
>
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