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Total 18 documents matching your query.

1. [Amps] QRO Parts (score: 1)
Author: Alex Gavva <ur4ll@ur4ll.net>
Date: Wed, 27 Jun 2012 19:12:33 +0300
Hi All, Please visit my new QRO Parts Site: http://www.ur4ll.net Best regards, Alex, UR4LL KO70XG mailto:ur4ll@ur4ll.net _______________________________________________ Amps mailing list Amps@contest
/archives//html/Amps/2012-06/msg00424.html (6,471 bytes)

2. Re: [Amps] ND2X (score: 1)
Author: Alex Gavva <ur4ll@ur4ll.net>
Date: Fri, 29 Jun 2012 16:59:53 +0300
Have also bargain price NIB GU34b tetrodes available, they are close to GU74b (4cx800a), but are not so known. Dr Alex Gavva QRO Parts Site: http://www.ur4ll.net UR4LL KO70XG mailto:ur4ll@ur4ll.net
/archives//html/Amps/2012-06/msg00446.html (7,450 bytes)

3. [Amps] 3CX1500A7/8877 (score: 1)
Author: Alex Gavva <ur4ll@ur4ll.net>
Date: Mon, 30 Jul 2012 08:03:41 +0300
Hi All, Russian GS35b triode is close to 8877 and works up to 1000MHz and able to run 1.5kW easy with 3kV plate voltage. It is able to work with 4kV and even 4.5kV plate voltage. NOS Russia made tube
/archives//html/Amps/2012-07/msg00392.html (6,677 bytes)

4. [Amps] GS35b (score: 1)
Author: Alex Gavva <ur4ll@ur4ll.net>
Date: Mon, 30 Jul 2012 15:56:26 +0300
Hi All, At the local TV center GS35b usually works during 18 month in 500W TV signal TXes (400-600MHz),it is about 13 000 hours. In amateur practice it is able to work about 10 years with good contes
/archives//html/Amps/2012-07/msg00405.html (6,315 bytes)

5. Re: [Amps] 3CX1500A7/8877 vs el cheapo GS-35B (score: 1)
Author: Alex Gavva <ur4ll@ur4ll.net>
Date: Tue, 31 Jul 2012 22:14:22 +0300
Hi All, It is Russian PA with 2 GS35b built by UA6HN in 1985: http://www.cqham.ru/foto/showphoto.php?photo=761&title=-d5-ce-d0-ce-d8-cecf-ce-cc-ce-c3-c0-cb&cat=500 It worked during 10 years without e
/archives//html/Amps/2012-07/msg00454.html (8,784 bytes)

6. Re: [Amps] 3CX1500A7/8877 vs el cheapo GS-35B (score: 1)
Author: Alex Gavva <ur4ll@ur4ll.net>
Date: Wed, 1 Aug 2012 07:38:38 +0300
Hi All, I have placed this picture of GS35b PA only to demonstrate how it is easy to build PA with this tube. It can work without socket, in horizontal position as well, with modest air cooling. It i
/archives//html/Amps/2012-07/msg00480.html (8,717 bytes)

7. Re: [Amps] $120 tube running a 1500 watt amplifier (score: 1)
Author: Alex Gavva <ur4ll@ur4ll.net>
Date: Mon, 20 Aug 2012 07:53:38 +0300
Hi All, If someone came up with a socket, the price of that tube would skyrocket very quickly and/or supplies would dry up very quickly. 73, Alek. VK6APK Exactly! 73 Jim W7RY GS23b is another great R
/archives//html/Amps/2012-08/msg00335.html (7,875 bytes)

8. Re: [Amps] Question re GU-74B grid current (score: 1)
Author: Alex Gavva <ur4ll@ur4ll.net>
Date: Tue, 23 Oct 2012 11:17:14 +0300
Hi All, Russian GU43b works up to 100MHz and it is equal 4cx1600 tetrodes. It runs 1600W easy, 2 kW is possible also. Its price is $65, the price of its original socket is $90. Another not very known
/archives//html/Amps/2012-10/msg00124.html (8,323 bytes)

9. Re: [Amps] Additional comments, re GU-74B/4CX800A (score: 1)
Author: Alex Gavva <ur4ll@ur4ll.net>
Date: Sat, 27 Oct 2012 17:33:41 +0300
Hi All, I also dont know Russian analoge of 4CX1600b 4CX1600U = GS23b. Picture and data of GU84b are here: http://www.ur4ll.net/gu84b.html My QRO Parts Site: http://www.ur4ll.net Best regards, Alex,
/archives//html/Amps/2012-10/msg00181.html (8,391 bytes)

10. Re: [Amps] New 4-1000 Tubes ? (score: 1)
Author: Alex Gavva <ur4ll@ur4ll.net>
Date: Sat, 5 Jan 2013 19:56:05 +0200
Russian GU46 is close to 4-1000: http://www.ur4ll.net/26-GU46.jpg My QRO Parts Site: http://www.ur4ll.net Best regards, Alex, UR4LL KO70XG mailto:ur4ll@ur4ll.net _____________________________________
/archives//html/Amps/2013-01/msg00043.html (6,460 bytes)

11. Re: [Amps] New 4-1000 Tubes ? (score: 1)
Author: Alex Gavva <ur4ll@ur4ll.net>
Date: Sun, 6 Jan 2013 11:02:36 +0200
Hello Carl, You wrote 5 2013 ., 22:30:46: Thank you for very useful notes. GU46 were rare used here because of we good choice of another cheap tubes. I know a few designs with 1-2pcs of GU46, 1 tube
/archives//html/Amps/2013-01/msg00051.html (8,329 bytes)

12. Re: [Amps] New 4-1000 Tubes ? (score: 1)
Author: Alex Gavva <ur4ll@ur4ll.net>
Date: Mon, 7 Jan 2013 17:12:41 +0200
Hello Hsu, You wrote 7 2013 ., 16:32:17: We had plenty excellent tubes and people did not pay attention to GU81m earlier. Now situation is different , it is very big problem to find cheap GU74b,84b,7
/archives//html/Amps/2013-01/msg00058.html (10,574 bytes)

13. [Amps] Parts for amplifiers (score: 1)
Author: Alex Gavva <ur4ll@ur4ll.net>
Date: Sat, 15 Jun 2013 09:22:06 +0300
Hello All, Have many parts for sale. My QRO Parts Site: http://www.ur4ll.net Mail to: drgavva@gmail.com Thanks for your time. Best regards, Alex, UR4LL KO70XG ________________________________________
/archives//html/Amps/2013-06/msg00224.html (6,722 bytes)

14. [Amps] FS: Russian 3cx800a7 and Tetrode GS3b (score: 1)
Author: Alex Gavva <ur4ll@ur4ll.net>
Date: Fri, 30 Aug 2013 19:56:18 +0300
Hi All, I have for sale Russian 3cx800a7 triode made by Svetlana(1 pcs only)-$135 and 2.5kW GS3b tetrode -$140. You can watch them on my site www.ur4ll.net among Triodes and Tetrodes. Alex, UR4LL. __
/archives//html/Amps/2013-08/msg00182.html (6,440 bytes)

15. Re: [Amps] GS23B Plate load resistance for HF (score: 1)
Author: Alex Gavva <ur4ll@ur4ll.net>
Date: Tue, 29 Oct 2013 16:46:29 +0200
Dave and All, GS23b is the greatest Russian tube, it is not so known as GS35b, GU74b or GU84b due to its socket, it is impossibly to find industrial ones and it is very hard to build GS23b quality so
/archives//html/Amps/2013-10/msg00442.html (8,072 bytes)

16. Re: [Amps] GS-23B (score: 1)
Author: Alex Gavva <ur4ll@ur4ll.net>
Date: Fri, 15 Aug 2014 07:35:31 +0300
15.08.2014 4:18, Paul Kraemer ?????: The GS-23B tetrode has anyone used one of these in a linear? Comments? Paul K0UYA _______________________________________________ Amps mailing list Amps@contestin
/archives//html/Amps/2014-08/msg00042.html (7,611 bytes)

17. [Amps] F1FRV GS35B PA Semi-Kit (score: 1)
Author: Alex Gavva <ur4ll@ur4ll.net>
Date: Wed, 25 May 2016 07:23:22 +0300
Dominique, F1FRV: http://f1frv.free.fr/main1o_KIT_GS-35b_Decametric_Amp.html -- Dr Alex Gavva My QRO Parts site: www.ur4ll.net UR4LL, KO80db _______________________________________________ Amps maili
/archives//html/Amps/2016-05/msg00033.html (6,898 bytes)

18. Re: [Amps] TL-922(A) Recent Acquisition (score: 1)
Author: Alex Gavva <ur4ll@ur4ll.net>
Date: Sun, 27 Nov 2016 07:38:35 +0200
27.11.2016 7:30, Vic Rosenthal : I would definitely replace it with vacuum relays, or a vacuum relay plus a reed relay. The stock relay tends to hot switch with semi-QSK CW and SSB VOX. It isn't wort
/archives//html/Amps/2016-11/msg00141.html (12,678 bytes)

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