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Total 17 documents matching your query.

1. RE: [BULK] - [Amps] NCL 2000? (score: 1): Author: Steve Katz <stevek@jmr.com>; Date: Mon, 29 Sep 2003 07:46:17 -0700; It's a very pretty amplifier that is, of course, also quite old, c. 1966 or so. As such, if it has its original filter capacitors they should be replaced, along with their equalizing resistors. The 8; /archives//html/Amps/2003-09/msg00211.html (8,076 bytes)
2. RE: [BULK] - [Amps] NCL 2000? (score: 1): Author: "Skram, Helge (MED)" <helge.skram@med.ge.com>; Date: Tue, 30 Sep 2003 15:30:59 +0200; My advice is: Don't convert from 8122 to 4CX250b. I am aware that many get 1kw out of these, but the signal is not linear. The anode voltage will be far beyond the max spec for the 4cx250b. In the lo; /archives//html/Amps/2003-10/msg00000.html (9,336 bytes)
3. RE: [BULK] - [Amps] NCL 2000? (score: 1): Author: rlm <r@somis.org>; Date: Tue, 30 Sep 2003 09:30:11 -0700; ? Steve -- would conversion to Svetlana 4cx400s or 4cx800s be do-able? _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listi; /archives//html/Amps/2003-10/msg00004.html (7,397 bytes)
4. RE: [BULK] - [Amps] NCL 2000? (score: 1): Author: Steve Katz <stevek@jmr.com>; Date: Tue, 30 Sep 2003 07:58:59 -0700; Hi Helge, Re: Your 4CX250B comments. I've had the same set of Eimac 7203/4CX250Bs in my two meter amplifier since 1981. Run it with Ep = 2500V, Eg2 = 350V, lots of air, and 1 kW PEP output power for,; /archives//html/Amps/2003-10/msg00006.html (11,505 bytes)
5. RE: [BULK] - [Amps] NCL 2000? (score: 1): Author: Steve Katz <stevek@jmr.com>; Date: Tue, 30 Sep 2003 10:17:10 -0700; Hi Rich, I'll bet the Svetlana mod would be do-able, and probably cheaper than almost any other mod, but I've never tried it. Next time I have an NCL2000 on the bench with dead 8122s (it will eventua; /archives//html/Amps/2003-10/msg00007.html (8,400 bytes)
6. Re: [BULK] - [Amps] NCL 2000? (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Wed, 1 Oct 2003 09:13:07 +0100; Steve Katz wrote: I've had the same set of Eimac 7203/4CX250Bs in my two meter amplifier since 1981. Run it with Ep = 2500V, Eg2 = 350V, lots of air, and 1 kW PEP output power for, oh, about 10,000 h; /archives//html/Amps/2003-10/msg00011.html (9,634 bytes)
7. RE: [BULK] - [Amps] NCL 2000? (score: 1): Author: rlm <r@somis.org>; Date: Wed, 1 Oct 2003 03:37:44 -0700; ? On SSB. running grid current with 4cx250Bs substantially increases the chances of one getting tarred and feathered at the next Ham swap meet. _______________________________________________ Amps m; /archives//html/Amps/2003-10/msg00013.html (7,793 bytes)
8. Re: [BULK] - [Amps] NCL 2000? (score: 1): Author: Dennis12Amplify@aol.com; Date: Wed, 1 Oct 2003 15:01:44 EDT; Helge, I have some Burle, (and RCA), 4662's that I had picked up at a Hamfest long ago from a guy I have bought at least a hundred ceramic tubes from over the past 25 years. I picked them up because; /archives//html/Amps/2003-10/msg00014.html (8,110 bytes)
9. Re: [BULK] - [Amps] NCL 2000? (score: 1): Author: GGLL <nagato@arnet.com.ar>; Date: Thu, 02 Oct 2003 09:37:26 -0300; Is that the only type number for them?; I've been searching and only have found tubes used as tuning indicators with that specification (4662). Best regards Guillermo - LU8EYW. Dennis12Amplify@aol.co; /archives//html/Amps/2003-10/msg00018.html (8,874 bytes)
10. Re: [BULK] - [Amps] NCL 2000? (score: 1): Author: Dennis12Amplify@aol.com; Date: Thu, 2 Oct 2003 13:14:42 EDT; Now you are running into the same problem I had! That's why I got excited when the other person posted the name Burle along with RCA because that was the first time I had seen anyone who indicated th; /archives//html/Amps/2003-10/msg00020.html (9,733 bytes)
11. Re: [BULK] - [Amps] NCL 2000? (score: 1): Author: GGLL <nagato@arnet.com.ar>; Date: Thu, 02 Oct 2003 21:26:02 -0300; Dennis12Amplify@aol.com escribió: ** If I knew for sure that they would sub for 8122's, I would test them in working units or send them to someone to be tested as 8122's and then put some of t; /archives//html/Amps/2003-10/msg00022.html (8,543 bytes)
12. Re: [BULK] - [Amps] NCL 2000? (score: 1): Author: Dennis12Amplify@aol.com; Date: Fri, 3 Oct 2003 11:58:14 EDT; Guillermo, Thank you for the offer. I would have been happy to send you pictures, but it seems like I have had my question answered multiple times already. I wish I had asked it years ago! I really a; /archives//html/Amps/2003-10/msg00027.html (8,909 bytes)
13. Re: [BULK] - [Amps] NCL 2000? (score: 1): Author: Dennis12Amplify@aol.com; Date: Fri, 3 Oct 2003 15:44:09 EDT; Helge, Thank you for the info. Do you want to sell a pair or two? I would, if I was sure they were good, but after downloading the PDF files for those tubes I found that all the internal elements hav; /archives//html/Amps/2003-10/msg00029.html (9,515 bytes)
14. Re: [BULK] - [Amps] NCL 2000? (score: 1): Author: Dennis12Amplify@aol.com; Date: Fri, 3 Oct 2003 16:01:14 EDT; Colin, My problem was the 4cx120's and 350's I was trying to test were oscillating for some reason. Rather then dig any deeper, I just pulled out a one tube grid driven amp I use for testing and then; /archives//html/Amps/2003-10/msg00030.html (10,370 bytes)
15. Re: [BULK] - [Amps] NCL 2000? (score: 1): Author: Dennis12Amplify@aol.com; Date: Sat, 4 Oct 2003 18:02:45 EDT; Colin, Just downloaded your picture of the tube tester. You do very nice looking work. Regards, Dennis O. _______________________________________________ Amps mailing list Amps@contesting.com http://; /archives//html/Amps/2003-10/msg00035.html (8,216 bytes)
16. Re: [BULK] - [Amps] NCL 2000? (score: 1): Author: Dennis12Amplify@aol.com; Date: Sat, 4 Oct 2003 18:07:33 EDT; Mark, I have 4 of them but one has pin 5 cut short, and pin 5 is a non redundant filament pin. Plus I have no way to test them to make sure they are good. Regards, Dennis O. _________________________; /archives//html/Amps/2003-10/msg00036.html (8,321 bytes)
17. Re: [BULK] - [Amps] NCL 2000? (score: 1): Author: Dennis12Amplify@aol.com; Date: Mon, 6 Oct 2003 15:14:53 EDT; Helge, The question about if I wanted to sell one or two of those tubes was a question that you or someone else had asked me and I was responding to. On my computer. I can quote the original message; /archives//html/Amps/2003-10/msg00047.html (12,581 bytes)

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