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41. [Amps] Ep Sweet Spot (score: 1): Author: <sccook1@cox.net>; Date: Mon, 29 Jan 2007 8:24:16 -0800; Team, Playing around with my TL-922A this weekend (pair of 3-500Zs), I noticed that the amp was significantly more efficient with the plate voltage set to the lower voltage (2.2KV vs 3.2KV). For a gi; /archives//html/Amps/2007-01/msg00317.html (7,064 bytes)
42. Re: [Amps] Ep Sweet Spot (score: 1): Author: <sccook1@cox.net>; Date: Mon, 29 Jan 2007 13:22:32 -0800; It occured to me that the CW / SSB switch also changes the bias -- less ZSAC on CW. Perhaps this is the reason efficiency changes. Coaxial Dynamics wattmeter used to measure output 500W and input cac; /archives//html/Amps/2007-01/msg00326.html (7,971 bytes)
43. Re: [Amps] How best to reduce filament voltage? (score: 1): Author: "Steve Cook" <sccook1@cox.net>; Date: Fri, 2 Feb 2007 09:53:17 -0700; Team, Did anyone suggest using a length of 22ga Teflon wire to run voltage from the filament winding to the tube sockets. I used this method in both of my TL-922A Kenwood amps. Just trim the wires un; /archives//html/Amps/2007-02/msg00013.html (10,014 bytes)
44. Re: [Amps] 3-500Z (score: 1): Author: "Steve Cook" <sccook1@cox.net>; Date: Mon, 5 Feb 2007 22:33:50 -0700; Look on eBay -- saw an old style base 3-500Z (sans phonemic support block) there this weekend. Jim... Have an Eimac 3-500Z here...that has limited service...but not sure what you mean about "old styl; /archives//html/Amps/2007-02/msg00069.html (7,270 bytes)
45. Re: [Amps] High Power (2500 Watts) Bird RF Dummy Load For Sale (score: 1): Author: "Steve Cook" <sccook1@cox.net>; Date: Sun, 18 Feb 2007 16:22:24 -0700; Looking at the specs for the 2SC5125 output transistors used in the ICOM 756 series transceivers. Spec sheet says they are rated for 80W output each or 160W per pair up to 175Mhz. Wondering why ICOM; /archives//html/Amps/2007-02/msg00283.html (7,801 bytes)
46. [Amps] Power Transistor Question -- 2SC5125 (score: 1): Author: "Steve Cook" <sccook1@cox.net>; Date: Sun, 18 Feb 2007 16:39:26 -0700; Looking at the specs for the 2SC5125 output transistors used in the ICOM 756 series transceivers. Spec sheet says they are rated for 80W output each or 160W per pair up to 175Mhz. Wondering why ICOM; /archives//html/Amps/2007-02/msg00284.html (7,764 bytes)
47. Re: [Amps] Amps Digest, Vol 50, Issue 44 (score: 1): Author: <sccook1@cox.net>; Date: Mon, 19 Feb 2007 15:42:45 -0800; 3" tall -- amazing! -S _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2007-02/msg00306.html (7,129 bytes)
48. Re: [Amps] Power Transistor Question -- Thank You... (score: 1): Author: "Steve Cook" <sccook1@cox.net>; Date: Mon, 19 Feb 2007 19:06:47 -0700; Team, Thanks for all the interesting gouge on how transistor rigs are set up -- who da thunk it. I will leave the adjust pot alone -- promise! Looking at the specs for the 2SC5125 output transistors; /archives//html/Amps/2007-02/msg00308.html (8,693 bytes)
49. Re: [Amps] Bird wattmeter (score: 1): Author: <sccook1@cox.net>; Date: Mon, 7 May 2007 15:15:58 -0700; My watt meter is a dead nutts on the dial. I talks into the mike-re-phone and puts the fire to the wire. If ya knows how to tune 'em right -- a par of 500 zulus will flat boogie -- guts, feathers 'n; /archives//html/Amps/2007-05/msg00066.html (15,172 bytes)
50. [Amps] Tranformer Suppliers (score: 1): Author: "Steve Cook" <sccook1@cox.net>; Date: Fri, 7 Dec 2007 16:03:15 -0700; Where can an individual purchase core material, paper, wire, etc? We may need to get serious about winding our own... Wonder if there is a distributor who will sell Hypersil C cores to hams. I would; /archives//html/Amps/2007-12/msg00045.html (11,603 bytes)
51. [Amps] RF Parts Supplier (score: 1): Author: "Steve Cook" <sccook1@cox.net>; Date: Sun, 6 Jan 2008 04:13:44 -0700; Team, Two items: I am trying to recall an RF parts supplier in Oceanside, CA -- Highway Electronics or Linc Surplus or something like that. They carried lots and lots of high power RF parts. I am sea; /archives//html/Amps/2008-01/msg00063.html (6,733 bytes)
52. Re: [Amps] Amperex triode (score: 1): Author: <sccook1@cox.net>; Date: Thu, 31 Jan 2008 10:30:03 -0800; Probably a "Freedon Frys" thing... -S _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2008-01/msg00275.html (11,798 bytes)
53. Re: [Amps] Relays (score: 1): Author: "Steve Cook" <sccook1@cox.net>; Date: Sun, 30 Mar 2008 09:50:05 -0700; When I first saw a Jennings RJ-1, and compared it to the open frame relay my '220 was using, it was astonishing. That was because vacuum relays are good for isolation. However RJ-1's are virtually us; /archives//html/Amps/2008-03/msg00358.html (8,217 bytes)
54. Re: [Amps] Silver Strap (score: 1): Author: <sccook1@cox.net>; Date: Fri, 11 Jul 2008 13:49:27 -0400; I have also seen silver plated surfaces Kim-filmed (Irridite). Looks kind of golden. Just a thought... -S _______________________________________________ Amps mailing list Amps@contesting.com http://; /archives//html/Amps/2008-07/msg00109.html (8,903 bytes)
55. Re: [Amps] Thoughts on half-wave dipole (score: 1): Author: "Steve Cook" <sccook1@cox.net>; Date: Sun, 27 Jul 2008 17:22:30 -0700; By the time you figure this one out mathematically, you could already have had the answer with an antennalizer and a pair of wire cutters. I know this is a bit off-topic. but possibly someone here ha; /archives//html/Amps/2008-07/msg00304.html (11,615 bytes)
56. Re: [Amps] 3-500Z glitch resistor (score: 1): Author: <sccook1@cox.net>; Date: Mon, 8 Sep 2008 16:16:21 -0700; Team, How about a resistor in series with fuse. -S _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2008-09/msg00052.html (15,797 bytes)
57. Re: [Amps] 3-500Z glitch resistor (score: 1): Author: <sccook1@cox.net>; Date: Tue, 16 Sep 2008 18:18:48 -0400; If the concern is FOD from a glass fuse, I wonder if the ceramic type would be more robust with respect to shattering. One could always place a piece of heat shrink on the body of the fuse for added; /archives//html/Amps/2008-09/msg00160.html (14,236 bytes)
58. Re: [Amps] 3-500Z glitch resistor (score: 1): Author: <sccook1@cox.net>; Date: Tue, 16 Sep 2008 18:26:13 -0400; One more comment... On my 8170 amp I used a 20 Ohm, 25 Watt wirewound. When I first got my amp working, I had made a mistake in the neturalizing circuit and the amp was not fully neturalized and woul; /archives//html/Amps/2008-09/msg00161.html (14,675 bytes)
59. Re: [Amps] Semtech diode (score: 1): Author: <sccook1@cox.net>; Date: Mon, 27 Oct 2008 12:18:50 -0700; If Henry does not have it and you can't find one after market, you could build your own adjustable bias device using a string of 1N5408 or simular diodes. See Rich Measures' web page or Google AG6K f; /archives//html/Amps/2008-10/msg00125.html (9,357 bytes)
60. Re: [Amps] Wanted Henry 3K Premier Manual or Schematic (score: 1): Author: <sccook1@cox.net>; Date: Thu, 20 Nov 2008 06:42:53 -0800; Mods.dk has a number of Henry manuals, but none in the Classis series. -S cheers Dave BAMA has the 3K Classic manual. I need the Premier manual. The Premier has 160 meters. The classic does not.; /archives//html/Amps/2008-11/msg00191.html (9,960 bytes)

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