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21. Re: [Amps] 8122,4662,4cx400a,4cx250b,ncl2000 (score: 1): Author: Dennis12Amplify@aol.com; Date: Fri, 3 Oct 2003 11:51:45 EDT; That's great information, thanks! Regards, Dennis O. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2003-10/msg00026.html (7,958 bytes)
22. 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)
23. Re: Reply to: [BULK] - [Amps] NCL 2000? (score: 1): Author: Dennis12Amplify@aol.com; Date: Fri, 3 Oct 2003 15:19:42 EDT; Will, Thank you for the information. I went to both of the websites you listed and downloaded and printed the PDF files. for the 8122 and the 4662. Regards, Dennis O. In a message dated 10/3/03 12:09; /archives//html/Amps/2003-10/msg00028.html (8,525 bytes)
24. 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)
25. 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)
26. 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)
27. 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)
28. Re: [Amps] Power meter calibration (score: 1): Author: Dennis12Amplify@aol.com; Date: Mon, 6 Oct 2003 11:37:05 EDT; Martin, I believe the .55 is to compensate for the forward bias voltage threshold of the diode used in the rectifier circuit in the meter, but number that varies from diode to diode, and often the ca; /archives//html/Amps/2003-10/msg00046.html (8,582 bytes)
29. 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)
30. [Amps] K8CU High Voltage Breakdown Tester - A RecommendedModification (score: 1): Author: Dennis12Amplify@aol.com; Date: Tue, 14 Oct 2003 13:55:39 EDT; statements. but if I am correct, I hope you will support my recommended change to his published circuit. -- looked at the HV breakdown tester referred to in that post; and after taking a close look; /archives//html/Amps/2003-10/msg00126.html (11,318 bytes)
31. [Amps] Re: HV breakdown tester schematic (score: 1): Author: Dennis12Amplify@aol.com; Date: Fri, 17 Oct 2003 07:29:58 EDT; verified what I thought I had found. I didn't want to critique you and be >>> wrong, so I put what I found out for comments and rebuttal, but other >>>than Rich's answer about the bridge rectifier, I; /archives//html/Amps/2003-10/msg00145.html (10,186 bytes)
32. Re: [Amps] a BANG in the AMP ? (score: 1): Author: Dennis12Amplify@aol.com; Date: Sun, 19 Oct 2003 13:19:37 EDT; .-.-.-.-.-.-.-.-.-.-.- ...Marc, ... I have had cases were a tube arcing internally caused a big bang, but it was elsewhere in the amp. ... The amp had rather large filter caps and a fuse in the HV ci; /archives//html/Amps/2003-10/msg00173.html (9,107 bytes)
33. Re: [Amps] Ionized Gas in the Tube (score: 1): Author: Dennis12Amplify@aol.com; Date: Tue, 21 Oct 2003 01:42:46 EDT; ...Ian .... Have you got that information documented anywhere? ... Sounds like it would make for interesting reading. ...Regards, ...Dennis O. _______________________________________________ Amps mai; /archives//html/Amps/2003-10/msg00197.html (7,568 bytes)
34. Re: [Amps] tube replacement ? (score: 1): Author: Dennis12Amplify@aol.com; Date: Mon, 17 Nov 2003 15:53:35 EST; Werner, If I were you I would either add a screen supply to those tetrodes to get the transconductance back again, or (since you said the 4-400s were running with grounded grids), try just plugging i; /archives//html/Amps/2003-11/msg00236.html (7,981 bytes)
35. Re: [Amps] tube replacement ? (score: 1): Author: Dennis12Amplify@aol.com; Date: Tue, 18 Nov 2003 16:41:37 EST; Rich, He's running the 4-400's grounded grid, so the peak emission would not be the same without a MUCH higher cathode drive level, and then only if that maximum cathode emission you refer to could a; /archives//html/Amps/2003-11/msg00250.html (9,330 bytes)
36. Re: [Amps] tube replacement ? (score: 1): Author: Dennis12Amplify@aol.com; Date: Wed, 19 Nov 2003 05:04:01 EST; ^I don't know where you got your peak emission numbers from, but the characteristic curves published by Eimac for both tubes show Ip as high as 2.2 amperes. ^ The only difference is that the 4-400A n; /archives//html/Amps/2003-11/msg00262.html (10,125 bytes)
37. Re: [Amps] Relay Keying on the Ameritron ALS-600 (score: 1): Author: Dennis12Amplify@aol.com; Date: Tue, 20 Jan 2004 04:31:51 EST; Kevin, Since you are using a foot switch anyway; why not key the amp and let the amp key the radio? Regards, Dennis O. _______________________________________________ Amps mailing list Amps@contestin; /archives//html/Amps/2004-01/msg00195.html (6,888 bytes)
38. Re: [Amps] Interesting survey (score: 1): Author: Dennis12Amplify@aol.com; Date: Wed, 11 Feb 2004 00:54:05 EST; In a message dated 2/10/04 11:34:57 PM Central Standard Time, k6kwq@msn.com writes: At the present time there are 144 amplifiers for sale on EBAY. 68 of them are CB amps and 76 could be considered Ha; /archives//html/Amps/2004-02/msg00074.html (7,230 bytes)
39. [Amps] Transformer (score: 1): Author: Dennis12Amplify@aol.com; Date: Wed, 18 Feb 2004 04:24:04 EST; Hi: I am looking for a power transformer for a Heath SB-230 amp. Will consider basket case SB-230 if transformer is Ok. Thanks. Randy, W7HR Port Orchard, WA retired@easystreet.com Randy, Do you happe; /archives//html/Amps/2004-02/msg00161.html (7,039 bytes)
40. [Amps] Heathkit Transformers and Meters (score: 1): Author: Dennis12Amplify@aol.com; Date: Thu, 19 Feb 2004 16:19:48 EST; Due to the large number of emails I have received concerning the Heath Power Transformers and Meters I have in stock, I decided it would be best to respond to the reflector instead of answering each; /archives//html/Amps/2004-02/msg00181.html (8,616 bytes)

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