Hi Jim,
Ooops, my typo. Why do they put the 4 & 5 keys so close together?
(rhetorical)
There are 4-500A's too but, they're tetrodes.
73 & Good afternoon,
Marv WC6W
http://qsl.net/wc6w/
>
>
> ----- Original Message -----
> From: "Jim W7RY" <w7ry@inbox.com>
> To: "Radio WC6W" <wc6w_amps@yahoo.com>;
> <amps@contesting.com>
> Sent: Wednesday, December 01, 2010 11:23 PM
> Subject: Re: [Amps] Help identifying tubes
>
>
> > No such thing as a 4-500. They are 5-500s.
> >
> > 73
> > Jim W7RY
> >
> >
> > --------------------------------------------------
> > From: "Radio WC6W" <wc6w_amps@yahoo.com>
> > Sent: Wednesday, December 01, 2010 8:24 AM
> > To: <amps@contesting.com>
> > Subject: Re: [Amps] Help identifying tubes
> >
> >>
> >> 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
> >>> >
> >>> >
> >>> >
> _______________________________________________
> >>> > Amps mailing list
> >>> > Amps@contesting.com
> >>> > http://lists.contesting.com/mailman/listinfo/amps
> >>>
> >>>
> _______________________________________________
> >>> Amps mailing list
> >>> Amps@contesting.com
> >>> http://lists.contesting.com/mailman/listinfo/amps
> >>>
> >>
> >>
> >>
> >> _______________________________________________
> >> Amps mailing list
> >> Amps@contesting.com
> >> http://lists.contesting.com/mailman/listinfo/amps
> >>
> >>
> >>
> >> -----
> >> No virus found in this message.
> >> Checked by AVG - www.avg.com
> >> Version: 10.0.1170 / Virus Database: 426/3290 -
> Release Date: 11/30/10
> >>
> >>
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
>
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|