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41. Re: [Amps] amps < etc : (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Tue, 07 Mar 2006 00:54:11 +0000; One of the best tools in a homebrewer's arsenal is a good library. A complete set of Ham Radio on CDs is available for about $50 if you know where to look. A set of QEX would be useful, too. When yo; /archives//html/Amps/2006-03/msg00146.html (6,902 bytes)
42. Re: [Amps] A $500 amp! (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Tue, 07 Mar 2006 05:31:12 +0000; I note the original user has "upgraded." Those guys must be lusting for power now the sunspots have gone away. BTW, for you non-cognoscenti, "Bird watts" refers to the number of fowls sitting on your; /archives//html/Amps/2006-03/msg00161.html (7,180 bytes)
43. Re: [Amps] Transformers in series (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Sun, 12 Mar 2006 03:26:36 +0000; Rex answered your question, but there's another factor to keep in mind, and that's the insulation breakdown voltage of the transformers. Assuming both have the same secondary voltage, Vsex, when you; /archives//html/Amps/2006-03/msg00276.html (7,696 bytes)
44. Re: [Amps] SB-220 Shorted HV Transformer (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Wed, 15 Mar 2006 17:24:35 +0000; Especially seeing the OP's results, I sure wouldn't do this! Taking shortcuts too often leads to serious trouble. IMO, if you want to clean it to pristine condition, the _only_ safe method is to comp; /archives//html/Amps/2006-03/msg00393.html (8,252 bytes)
45. Re: [Amps] Boat-Anchor Cleanliness (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Wed, 15 Mar 2006 20:57:41 +0000; At my age, I recommend the single life and condo-dwelling! No yard work, and no nagging. Just make sure there are ample trees on the property from which to hang lowband antennas at night (a good gutt; /archives//html/Amps/2006-03/msg00402.html (7,933 bytes)
46. Re: [Amps] Boat-Anchor Cleanliness (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Wed, 15 Mar 2006 22:37:27 +0000; Actually, I'm the condo dweller. Hal lives in hotels. I've been doing covert antenna systems much of my ham career. Even wrote a book about it for ARRL. The space between my porch door and the neares; /archives//html/Amps/2006-03/msg00407.html (8,516 bytes)
47. [Amps] Trichloroethene (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Thu, 16 Mar 2006 03:41:06 +0000; I remembered the solvent we used to clean the Motorola radios was trichloroethylene, commonly called trichloroethene. Pretty nasty stuff if you breathe it, especially if you intend to have kids, (<ht; /archives//html/Amps/2006-03/msg00421.html (6,470 bytes)
48. Re: [Amps] increasing rf gain in driver stages ? (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Thu, 16 Mar 2006 06:11:44 +0000; The best way to learn about amps is to build a few. Two books I found useful as a non-engineer were Demaw and Hayward's Solid State Design for the Radio Amateur, and John Lenk's Handbook of Simplifie; /archives//html/Amps/2006-03/msg00427.html (8,366 bytes)
49. Re: [Amps] Washing equipment (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Thu, 16 Mar 2006 14:55:24 +0000; Tap water, but it had a non-standard thread. :) 73, Jim, KR1S http://kr1s.kearman.com/ _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.co; /archives//html/Amps/2006-03/msg00440.html (7,313 bytes)
50. Re: [Amps] tube cooling requirements (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Fri, 17 Mar 2006 14:10:11 +0000; Peter, Think of it as an Ohm's Law problem, with parallel resistors. If you have one resistor and a certain requirement for current flow through it at a specified voltage, when you add a second paral; /archives//html/Amps/2006-03/msg00491.html (7,027 bytes)
51. [Amps] Surfactants (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Fri, 17 Mar 2006 16:18:05 +0000; Meant to check for a brand name when I went shopping, but forgot. Supermarkets sell spray bottles of 'surfactants,' which are non-toxic and biodegradable. They don't foam like detergents. I've used t; /archives//html/Amps/2006-03/msg00495.html (7,234 bytes)
52. Re: [Amps] Surfactants (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Fri, 17 Mar 2006 17:41:46 +0000; Yeah, but that stuff has aromatic ingredients. Unless you rinse well your amp will stink like Peppy Le Pew. Non-aromatic surfactants are sold in supermarkets. http://consumer.simplegreen.com/cons_pro; /archives//html/Amps/2006-03/msg00501.html (7,301 bytes)
53. Re: [Amps] Trichloroethene (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Fri, 17 Mar 2006 18:41:51 +0000; Yes. http://www.dow.com/commitments/stewardship/increase.htm Also, if it spills into the ground it can contaminate the water supply for many years. 73, Jim, KR1S http://kr1s.kearman.com/ ____________; /archives//html/Amps/2006-03/msg00510.html (8,230 bytes)
54. Re: [Amps] Surfactants (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Fri, 17 Mar 2006 18:50:01 +0000; John, Yes, I'm sure they'll raise a stink! 73, Jim, KR1S http://kr1s.kearman.com/ _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mai; /archives//html/Amps/2006-03/msg00511.html (7,267 bytes)
55. Re: [Amps] Topband: Relays in RX array (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Thu, 23 Mar 2006 15:32:20 +0000; It's worth keeping an eye on the Bay. If you're willing to buy in bulk you can often find 12- or 24-V rf relays designed for PCB mounting pretty cheap. If wireless communication is cutting away inter; /archives//html/Amps/2006-03/msg00613.html (6,907 bytes)
56. Re: [Amps] Need some 220K 2 watt carbon resistors (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Mon, 27 Mar 2006 16:31:46 +0000; This is worth restating for first-time amp builders: Check the break-down voltage rating of the resistors you plan to use for bleeders. Most resistors capable of dissipating the wattage will withstan; /archives//html/Amps/2006-03/msg00689.html (9,043 bytes)
57. Re: [Amps] Need some 220K 2 watt carbon resistors (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Tue, 28 Mar 2006 06:35:10 +0000; I think his question was how to test the voltage rating. 73, Jim, KR1S http://kr1s.kearman.com/ _______________________________________________ Amps mailing list Amps@contesting.com http://lists.cont; /archives//html/Amps/2006-03/msg00696.html (8,362 bytes)
58. Re: [Amps] Need some 220K 2 watt carbon resistors (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Tue, 28 Mar 2006 16:09:12 +0000; Is this test method valid for wirewound resistors? Also, my intuition is that a resistor that will withstand X volts at room temperature may not hold up at higher temps. It's clear that the only way; /archives//html/Amps/2006-03/msg00706.html (9,616 bytes)
59. Re: [Amps] "I gotta tell this" (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Wed, 29 Mar 2006 00:24:45 +0000; Based on some of the egregious technical misstatements I've seen on various 'net venues lately, I wholeheartedly concur. Will, however, is a font of good information and I enjoy his posts enormously.; /archives//html/Amps/2006-03/msg00720.html (7,459 bytes)
60. Re: [Amps] "I gotta tell this" (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Wed, 29 Mar 2006 17:04:51 +0000; According to MADD, the 2004 number worked out to 1926 people every six weeks. <http://www.madd.org/stats/1112> Drunk driving and attacks by foreign nationals on U.S. soil are completely different iss; /archives//html/Amps/2006-03/msg00741.html (9,013 bytes)

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