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1. [Amps] 4CX800A (score: 1): Author: iz5asz@sitoverde.com (Massimo IZ5ASZ); Date: Sun, 22 Dec 2002 13:59:02 +0100; Hi, Anybody knows where I can find in Europe, at good price, a pair of = brand new Svetlana 4CX800A/GU74B. 73 de Massimo=20 IZ5ASZ Merry xmas ** Falla innamorare al TOP con un logo e un drin drin con; /archives//html/Amps/2002-12/msg00238.html (6,418 bytes)
2. [AMPS] 4cx800a (score: 1): Author: w4th@webtv.net (Tom Hix W4TH); Date: Fri, 8 Jun 2001 14:40:03 -0500 (CDT); Just a reminder that I am still selling the 4cx800a tubes for $200 a pair shipped. I also have the matching sk1a sockets for the 4cx800a tubes. I also have the 4cx400a tubes and I am glad to announce; /archives//html/Amps/2001-06/msg00077.html (7,436 bytes)
3. [AMPS] 4cx800a (score: 1): Author: w4th@webtv.net (Tom Hix W4TH); Date: Fri, 30 Jun 2000 00:17:34 -0500 (CDT); I still have a few of the matched pairs of 4cx800a tubes left. These are nos Soviet military surplus tubes. These tubes will produce just as much wattage as any 4cx800a tube on the market today. The; /archives//html/Amps/2000-06/msg00503.html (7,112 bytes)
4. [Amps] 4cx800a (score: 1): Author: gdaught6@stanford.edu; Date: Mon, 15 Feb 2010 15:44:41 -0800; Let me throw my experience(s) into this. Not God's word, just my own personal experience. Svetlana made the GU-74B (I don't want to fuss with Cyrillic letters here) which was used in some commerciall; /archives//html/Amps/2010-02/msg00419.html (7,090 bytes)
5. Re: [Amps] 4cx800a (score: 1): Author: "Cecil Acuff" <chacuff@cableone.net>; Date: Mon, 15 Feb 2010 18:57:25 -0600; --cut-- Interesting about the 4CX800A...it's potential availability and most of all the bad reports of it's performance. (IMD etc.) I had considered the purchase of an Acom 1000 a while back. It gets; /archives//html/Amps/2010-02/msg00420.html (7,533 bytes)
6. Re: [Amps] 4cx800a (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 15 Feb 2010 20:20:19 -0500; The average amp owner could give a hoot about anyone else on the band. He probably figures IMD is a government agency. As I said earlier the tube isnt bad when its boiling water on the cover of the a; /archives//html/Amps/2010-02/msg00421.html (8,316 bytes)
7. Re: [Amps] 4cx800a (score: 1): Author: Michael Tope <W4EF@dellroy.com>; Date: Mon, 15 Feb 2010 18:13:55 -0800; 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 ad; /archives//html/Amps/2010-02/msg00423.html (9,368 bytes)
8. Re: [Amps] 4cx800a (score: 1): Author: "Bert Almemo" <balmemo@sympatico.ca>; Date: Mon, 15 Feb 2010 21:14:42 -0500; I'm considering buying an Alpha amp with 4CX800s, like the 91B, but I guess that's not a good choice? I wouldn't mind some facts instead of "unbiased" personal opinions. Thanks. Bert VE3OBU --cut-- -; /archives//html/Amps/2010-02/msg00424.html (9,624 bytes)
9. Re: [Amps] 4cx800a (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Tue, 16 Feb 2010 11:37:59 +0800; UR4LL, in my opinion, is the ONLY person to deal with. He is as honest as the day is long, His service is second to none. You can speak to him live on Skype and he will show you your goods as you are; /archives//html/Amps/2010-02/msg00425.html (10,784 bytes)
10. Re: [Amps] 4cx800a (score: 1): Author: donroden@hiwaay.net; Date: Mon, 15 Feb 2010 22:25:56 -0600; 4CX3000s and 4CX5000s Don WA4NPL _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2010-02/msg00426.html (6,902 bytes)
11. Re: [Amps] 4cx800a (score: 1): Author: Michael Tope <W4EF@dellroy.com>; Date: Mon, 15 Feb 2010 21:00:01 -0800; 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; /archives//html/Amps/2010-02/msg00427.html (8,633 bytes)
12. Re: [Amps] 4cx800a (score: 1): Author: James Colville <jimw7ry@gmail.com>; Date: Mon, 15 Feb 2010 21:10:07 -0800; They probebly have to drive them too hard to hard so the IMD is poor. I had a pair and tried to build an amp with them. I could not get it to put out 1500 watts and stay within the specifications tha; /archives//html/Amps/2010-02/msg00428.html (11,252 bytes)
13. Re: [Amps] 4cx800a (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Tue, 16 Feb 2010 00:38:05 -0500; 4CX3000A filament 9.0VAC @ 41.5A = 373.5 Watts 4CX5000A filament 7.5VAC @ 75A = 562.5 Watts Yah, but I hate to use more electricity to light the fire in the final than for all the rest of my station.; /archives//html/Amps/2010-02/msg00429.html (8,728 bytes)
14. Re: [Amps] 4cx800a (score: 1): Author: "Cecil Acuff" <chacuff@cableone.net>; Date: Tue, 16 Feb 2010 07:45:25 -0600; --cut-- Sorry guys....I'm not looking for a 5kw amp and a $5000+ project... More reasonable...2500 watts. Drive reduced to produce 1500 is more what I had in mind... Triode might just be fine...I can; /archives//html/Amps/2010-02/msg00434.html (8,632 bytes)
15. Re: [Amps] 4cx800a (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Tue, 16 Feb 2010 10:05:18 -0500; 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 numb; /archives//html/Amps/2010-02/msg00437.html (10,209 bytes)
16. Re: [Amps] 4cx800a (score: 1): Author: Kees - pa7two <pa7two@hotmail.com>; Date: Tue, 16 Feb 2010 15:26:21 +0000; 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; /archives//html/Amps/2010-02/msg00438.html (11,908 bytes)
17. Re: [Amps] 4cx800a (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; 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; /archives//html/Amps/2010-02/msg00439.html (13,223 bytes)
18. Re: [Amps] 4cx800a (score: 1): Author: Kees - pa7two <pa7two@hotmail.com>; Date: Tue, 16 Feb 2010 20:03:25 +0000; 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; /archives//html/Amps/2010-02/msg00441.html (14,833 bytes)
19. Re: [Amps] 4cx800a (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; 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 Hi Carl, What exactly are you interested in? Packaging that clearly; /archives//html/Amps/2010-02/msg00442.html (15,758 bytes)
20. Re: [Amps] 4cx800a (score: 1): Author: Kees - pa7two <pa7two@hotmail.com>; Date: Wed, 17 Feb 2010 05:27:56 +0000; 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; /archives//html/Amps/2010-02/msg00460.html (18,020 bytes)

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