[Amps] 4cx800a

[Carl]

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 at hotmail.com>
To: "AMP reflector ADD MESSAGE" <amps at 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 at jeremy.mv.com
>> To: W4EF at dellroy.com; amps at 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 at dellroy.com>
>> To: <amps at 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...................
>> >>
>> >
>> >
>> > _______________________________________________
>> > Amps mailing list
>> > Amps at contesting.com
>> > http://lists.contesting.com/mailman/listinfo/amps
>>
>> _______________________________________________
>> Amps mailing list
>> Amps at contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>
> _________________________________________________________________
> Hotmail: Trusted email with powerful SPAM protection.
> http://clk.atdmt.com/GBL/go/201469227/direct/01/
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps