Hi Kees,
Who is the tube seller?
Is that this one: http://www.wvs-tech.de/wvs-tech/index.php?site=wvs
73
Peter
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of Kees - pa7two
Sent: Mittwoch, 17. Februar 2010 06:28
To: km1h@jeremy.mv.com; AMP reflector ADD MESSAGE
Subject: Re: [Amps] 4cx800a
Hi Carl,
In that case I cannot help you I guess. I do not have connections directly
to the plant, only to a tube seller.
If the data printed on new carton boxes and the year / month on new tubes
and on accompanied certificates are not good enough for you to judge that
these tubes are still produced, a well... That is your call :-)
Vy 73, de Kees.
> From: km1h@jeremy.mv.com
> To: pa7two@hotmail.com; amps@contesting.com
> Subject: Re: [Amps] 4cx800a
> Date: Tue, 16 Feb 2010 15:57:24 -0500
>
> What I really want is published data that says the tubes are in current
> production.
>
> Whats on the tube or a box is meaningless.
>
> Carl
>
>
> ----- Original Message -----
> From: "Kees - pa7two" <pa7two@hotmail.com>
> To: "AMP reflector ADD MESSAGE" <amps@contesting.com>
> Sent: Tuesday, February 16, 2010 3:03 PM
> Subject: Re: [Amps] 4cx800a
>
>
>
> Hi Carl,
>
> What exactly are you interested in? Packaging that
> clearly state the production date, tubes that have the dates printed? I
> can send you a photo of this to your email if you want?
>
> Let me know, as I have these tubes currently on stock so I can easily
shoot
> some photos now.
>
> Vy 73, de Kees.
>
>
>
> > From: km1h@jeremy.mv.com
> > To: pa7two@hotmail.com; amps@contesting.com
> > Subject: Re: [Amps] 4cx800a
> > Date: Tue, 16 Feb 2010 10:38:14 -0500
> >
> > All the 800's Ive seen had rebranded codes on them Kees, but this was
> > mostly
> > 10+ years ago.
> >
> > See what you can find out over there but I havent heard anything
confirmed
> > about new production.
> >
> > Carl
> > KM1H
> >
> >
> > ----- Original Message -----
> > From: "Kees - pa7two" <pa7two@hotmail.com>
> > To: "AMP reflector ADD MESSAGE" <amps@contesting.com>
> > Sent: Tuesday, February 16, 2010 10:26 AM
> > Subject: Re: [Amps] 4cx800a
> >
> >
> > >
> > > Hi Carl,
> > >
> > > I have certainly seen Svetlana production 2007 / 2008 (as I recall)
> > > labled
> > > with "4CX800a". I do recall seeing this label on a few websites too.
> > >
> > > Furthermore are the GU74B tubes still recently produced at the
Svetlana
> > > factory. I assisted HAMs obtaining these young age tubes when needed
as
> > > a
> > > spare, and I furthermore I have at current a few spares GU74Bs from
year
> > > 2007 and 2008 in my shack / at stock.
> > >
> > >
> > > Vy 73, de Kees.
> > >
> > > Member of an all HAM family.
> > >
> > > AmateurRadio : PA7TWO - M5TWO Locator: JO22jp.
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >> From: km1h@jeremy.mv.com
> > >> To: W4EF@dellroy.com; amps@contesting.com
> > >> Date: Tue, 16 Feb 2010 10:05:18 -0500
> > >> Subject: Re: [Amps] 4cx800a
> > >>
> > >> There is no 4CX800A except on paper and a repaint job.
> > >>
> > >> ALL came from the Russian factory as GU-74B's.
> > >>
> > >> The 4CX800A designator has nothing to do with standards other than it
> > >> copies
> > >> Eimacs internal numbering scheme.
> > >>
> > >> In the real world US standard it would have a 4 digit ID such as
8877,
> > >> or
> > >> 8166 if it was a 4-1000A, etc, etc..
> > >>
> > >> Carl
> > >> KM1H
> > >>
> > >>
> > >> ----- Original Message -----
> > >> From: "Michael Tope" <W4EF@dellroy.com>
> > >> To: <amps@contesting.com>
> > >> Sent: Tuesday, February 16, 2010 12:00 AM
> > >> Subject: Re: [Amps] 4cx800a
> > >>
> > >>
> > >> > Thanks to everyone for the feedback on Dr. Alex UR4LL. From all
> > >> > accounts
> > >> > he is a very good person to deal with.
> > >> >
> > >> > That brings me to my next question. Is the GU74B truly pin-for-pin
> > >> > compatible with the 4CX800A? IOW, can I plug two GU74Bs into my
Alpha
> > >> > 91B and expect the same kind of performance that I get with the
> > >> > 4CX800As
> > >> > that are in there now?
> > >> >
> > >> > Thanks,
> > >> >
> > >> > Mike W4EF.................................
> > >> >
> > >> > On 2/15/2010 6:13 PM, Michael Tope wrote:
> > >> >> Is there a reliable supplier of NOS GU74B/4CX800A's? I have an
Alpha
> > >> >> 91B
> > >> >> and was thinking that I should pick-up some spare tubes for it
> > >> >> before
> > >> >> the NOS pool dries up completely. I see that UR4LL is advertising
> > >> >> them
> > >> >> for $100 each. That seems too good to be true. Is he legit?
> > >> >>
> > >> >> BTW, I agree that the 4CX800A isn't a terribly clean tube for SSB
> > >> >> service. All the commercially available amps I've seen with this
> > >> >> tube
> > >> >> (including the Alpha91B) have mediocre IMD specs.
> > >> >>
> > >> >> Thanks,
> > >> >>
> > >> >> Mike W4EF...................
> > >> >>
> > >> >
> > >> >
> > >> > _______________________________________________
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> > >> > Amps@contesting.com
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> > >>
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