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21. Re: [Amps] Internal QSK-5 (score: 1): Author: Kim Elmore <cw_de_n5op@sbcglobal.net>; Date: Sun, 01 Feb 2009 10:41:35 -0600; I looked at the manuals available Ameritron site. I can't find a schematic, but simply by looking at the parts list, it's clear that these two switches are different. How different remains a mystery.; /archives//html/Amps/2009-02/msg00008.html (10,928 bytes)
22. Re: [Amps] Internal QSK-5 (score: 1): Author: Kim Elmore <cw_de_n5op@sbcglobal.net>; Date: Sun, 01 Feb 2009 13:51:20 -0600; Thanks again, Joe! I suspect that the basic theory of operation is unchanged, but the hardware that implements the theory may be upgraded. I'll have to look on BAMA. Yes, Tom designed the PIN-5 which; /archives//html/Amps/2009-02/msg00018.html (16,646 bytes)
23. Re: [Amps] Internal QSK-5 (score: 1): Author: Kim Elmore <cw_de_n5op@sbcglobal.net>; Date: Sun, 01 Feb 2009 14:17:25 -0600; I downloaded the schematic from BAMA:the old PIN-5 ,ust be in there someplace, but it has evolved extensively. No ICs in the PIN-5, no FETs, and the PIN diodes are different. Both clearly must act as; /archives//html/Amps/2009-02/msg00019.html (16,043 bytes)
24. [Amps] QSK-5 Switch (score: 1): Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>; Date: Mon, 2 Feb 2009 06:50:42 -0800 (PST); As I unravel what's failed on with my PIN-5 swicth (a predecessor of the QSK-5 switch) I'm wodering: does the QSK-5 switch include a keying loop? There is a later version of the PIN-5 that seemes to; /archives//html/Amps/2009-02/msg00022.html (6,353 bytes)
25. [Amps] QSK-5 in AL-80A (score: 1): Author: Kim Elmore <cw_de_n5op@sbcglobal.net>; Date: Sun, 22 Feb 2009 22:26:35 -0600; I decided to bite the bullet and replace my (nearly prototype) ancient PIN-5 QSK switch I'd had in my Ameritron AL-80A amp with the newer QSK-5 switch. As some of you might recall, my PIN-5 had devel; /archives//html/Amps/2009-02/msg00655.html (7,691 bytes)
26. Re: [Amps] Amp Supply LK-500ZBx 3-500z tube & cooling question (score: 1): Author: Kim Elmore <cw_de_n5op@sbcglobal.net>; Date: Wed, 9 Jul 2014 07:17:34 -0500; Almost always, the export versions have/had 10 m enabled from the factory. Kim N5OP "People that make music together cannot be enemies, at least as long as the music lasts." -- Paul Hindemith _______; /archives//html/Amps/2014-07/msg00038.html (7,810 bytes)
27. Re: [Amps] Ion Pump (score: 1): Author: Kim Elmore <cw_de_n5op@sbcglobal.net>; Date: Sat, 19 Jul 2014 16:52:21 -0500; Back in the late 60's early 70's my dad worked as an aerospace physicist at what was then AVCO Tulsa Division. A big part of his work dealt with ion attitude sensors for vehicles. To do this work he; /archives//html/Amps/2014-07/msg00081.html (9,537 bytes)
28. Re: [Amps] Ion Pump (score: 1): Author: Kim Elmore <cw_de_n5op@sbcglobal.net>; Date: Sat, 19 Jul 2014 17:38:22 -0500; I should add that my recollections are *quite* old -- I may be off about how deep the vacuum was as it may not have been that deep. Kim N5OP A big part of his work dealt with ion attitude sensors for; /archives//html/Amps/2014-07/msg00082.html (10,949 bytes)
29. Re: [Amps] Don't Pass This One Up Boys! (score: 1): Author: Kim Elmore <cw_de_n5op@sbcglobal.net>; Date: Thu, 31 Jul 2014 17:55:09 -0600; "Rare serial number 23." Does the seller mean to imply that other serial numbers are more common? Kim N5OP "People that make music together cannot be enemies, at least as long as the music lasts." --; /archives//html/Amps/2014-07/msg00120.html (7,806 bytes)
30. Re: [Amps] Deep Brain Stimulation for Parkinson's treatment and RF in the ham shack (score: 1): Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>; Date: Mon, 4 Aug 2014 09:30:29 -0700; My son Type I diabetes April 2004. By August 2004, he was recommended for an insulin pump. We fund the Medtronic had the best features, but before we went down that road, I called Medtronic and asked; /archives//html/Amps/2014-08/msg00027.html (16,010 bytes)
31. [Amps] AL-1200 Tuning Capacitor Range (score: 1): Author: Kim Elmore <cw_de_n5op@sbcglobal.net>; Date: Fri, 17 Oct 2014 23:43:17 -0500; I have an AL-1200 that works very well using the 3CX1200A7 tube, but at the bottom end of 15 m the plate tune capacitor needs to be almost completely unmeshed for proper tuning. The load control is n; /archives//html/Amps/2014-10/msg00152.html (6,747 bytes)
32. Re: [Amps] AL-1200 Tuning Capacitor Range (score: 1): Author: Kim Elmore <cw_de_n5op@sbcglobal.net>; Date: Sat, 18 Oct 2014 07:15:35 -0500; Thanks, both. Had I given this more than passing thought at 11 PM, the answer would have obvious! Next chance I have, I'll see if I can spread out the turns a bit. I can't get the cover off where it; /archives//html/Amps/2014-10/msg00159.html (9,369 bytes)
33. Re: [Amps] AL-1200 Tuning Capacitor Range (score: 1): Author: Kim Elmore <cw_de_n5op@sbcglobal.net>; Date: Sat, 18 Oct 2014 12:44:50 -0500; Thanks, Carl! The tuning capacitor was *completely* unmeshed and I could not find the expected "double dip" points, which is what concerned me. I could never know if I was truly resonant or merely cl; /archives//html/Amps/2014-10/msg00171.html (9,036 bytes)
34. Re: [Amps] Comments solicited on AL-82 amp (score: 1): Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>; Date: Fri, 24 Oct 2014 10:32:12 -0700; I wouldn't shy away from used in good condition -- they look to be going for $1600-$2000. Save for the subchassis for the tubes, the AL-82, AL-1200 and AL-1500 are identical. All are very simple. You; /archives//html/Amps/2014-10/msg00224.html (8,923 bytes)
35. Re: [Amps] AL1200 on AM - max carrier? (score: 1): Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>; Date: Thu, 30 Oct 2014 07:04:22 -0700; Any amp will be inefficient when used as a linear amplifier for AM because as drive is reduced, efficiency is reduced. They will all generate a lot of heat in this application. However, the AL-1200 s; /archives//html/Amps/2014-10/msg00250.html (10,305 bytes)
36. Re: [Amps] AL80-B fuse F101 blown;step-startnot working? (score: 1): Author: Kim Elmore <cw_de_n5op@sbcglobal.net>; Date: Fri, 28 Nov 2014 13:31:46 -0700; In sure that the relay isn't stuck. They handle a fair bit of current and sometimes the contacts weld closed. Check all the components in the step-start circuit, too, to make sure they are all workin; /archives//html/Amps/2014-11/msg00066.html (9,783 bytes)
37. Re: [Amps] AL80-B fuse F101 blown;step-startnot working? (score: 1): Author: Kim Elmore <cw_de_n5op@sbcglobal.net>; Date: Fri, 28 Nov 2014 16:59:40 -0700; If you simply remove the tube and problem persists, it's not the tube. Given what you saw, I doubt the tube is the problem. Kim N5OP "People that make music together cannot be enemies, at least as lo; /archives//html/Amps/2014-11/msg00070.html (12,487 bytes)
38. Re: [Amps] Holding a vacuum (score: 1): Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>; Date: Mon, 1 Dec 2014 10:34:21 -0800; I always thought that a gassy tube is essentially a short when HV is applied, or perhaps like a thyratron: once current is allowed to flow by the control grid it can't be stopped until the cathode li; /archives//html/Amps/2014-12/msg00004.html (8,679 bytes)
39. Re: [Amps] Holding a vacuum (score: 1): Author: Kim Elmore <cw_de_n5op@sbcglobal.net>; Date: Mon, 1 Dec 2014 14:38:47 -0600; Ah! Thanks, Carl. This does, however, raise another question: when read here about storage life of transmitting tubes and whether they become gassy, it seems from what you write that whatever happens; /archives//html/Amps/2014-12/msg00007.html (14,243 bytes)
40. Re: [Amps] The genius of ham radio (score: 1): Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>; Date: Mon, 12 Jan 2015 07:44:39 -0800; I agree with Jim and Roger and take slight issue with Alek. We never do stuff that theory says "won't work." We regularly do stuff that theory says "Won't work well" or at least "won't work optimally; /archives//html/Amps/2015-01/msg00039.html (9,643 bytes)

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