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81. [AMPS] Stupid transformer question (score: 1): Author: jstrohm@texas.net (Jim Strohm); Date: Sat, 15 Dec 2001 20:25:17 -0600; I have this old but intact HV transformer from a microwave oven that (wonder of wonders) doesn't require knocking out the shunt to use. Predictably, it has one end of the HV winding tied to the frame; /archives//html/Amps/2001-12/msg00253.html (9,969 bytes)
82. [AMPS] Two-tone audio generator for testing IMD? (score: 1): Author: jstrohm@texas.net (Jim Strohm); Date: Mon, 17 Dec 2001 10:17:56 -0600; AG6K asks -- I don't think pre-distortion is a patentable technique. At microwave frequencies, pre-distortion is used by practically everybody in the business to improve amplifier efficiency AND line; /archives//html/Amps/2001-12/msg00294.html (8,094 bytes)
83. [AMPS] HV Pole Pig Transformers (score: 1): Author: jstrohm@texas.net (jstrohm@texas.net); Date: Wed, 19 Dec 2001 13:41:58 -0500; 1. Don't drop it on your foot. 2. Don't touch the HV electrodes when it's plugged in. 3. Don't -- oh, sorry, I thought I was writing text for an end-user manual. If it's still in the can and full of; /archives//html/Amps/2001-12/msg00344.html (10,102 bytes)
84. [AMPS] HV Pole Pig Transformers (score: 1): Author: jstrohm@texas.net (jstrohm@texas.net); Date: Wed, 19 Dec 2001 14:10:45 -0500; And as a point of information, a Dahl transformer of this size runs around $500 or $600, with shipping around $50 or $60 in CONUS. I'm cheap and I like to get my hands dirty, so for this price I migh; /archives//html/Amps/2001-12/msg00346.html (9,372 bytes)
85. [AMPS] HV Pole Pigs ++ (score: 1): Author: jstrohm@texas.net (jstrohm@texas.net); Date: Wed, 19 Dec 2001 14:49:05 -0500; I have to ask -- did Dahl _KNOW_ you were looking to need 500 of these in 100-piece lots? That might have made a difference on the prototype price. Of course, if the Chinese used Norinco to supply su; /archives//html/Amps/2001-12/msg00348.html (8,506 bytes)
86. [AMPS] HV Pole Pig Transformers (score: 1): Author: jstrohm@texas.net (Jim Strohm); Date: Wed, 19 Dec 2001 18:30:26 -0600; "Phil (VA3UX)" <phil@vaxxine.com> mentions a very good point -- And it goes without saying that if you rewind, it's trivial to clean the laminations before reassembly, and you can seal them (glyptol,; /archives//html/Amps/2001-12/msg00367.html (8,968 bytes)
87. [AMPS] HV Pole Pig Transformers (score: 1): Author: jstrohm@texas.net (Jim Strohm); Date: Wed, 19 Dec 2001 18:55:20 -0600; Expect most of the web to be "iffy" through Christmas -- last minute shoppers, and people on Christmas holiday. Jim N6OTQ -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesti; /archives//html/Amps/2001-12/msg00370.html (8,508 bytes)
88. [AMPS] Free stuff from business and industry (score: 1): Author: jstrohm@texas.net (Jim Strohm); Date: Wed, 19 Dec 2001 20:20:37 -0600; JimMoci@AOL.COM sez -- Nobody said there was anything wrong with businesses providing free stuff (pursuant to certain anti-bribery laws, of course). The issue was whether it was reasonable for a busi; /archives//html/Amps/2001-12/msg00371.html (10,261 bytes)
89. [AMPS] Free stuff from business and industry (score: 1): Author: jstrohm@texas.net (jstrohm@texas.net); Date: Thu, 20 Dec 2001 13:44:21 -0500; Steve Katz stevek@jmr.com said... When I was at Northern Telecom (now NorTel) in the early 1990s, one of their bravest quality initiatives was to pay some hefty bounties to employees who would come f; /archives//html/Amps/2001-12/msg00398.html (10,248 bytes)
90. [AMPS] Free stuff from business and industry (score: 1): Author: jstrohm@texas.net (jstrohm@texas.net); Date: Thu, 20 Dec 2001 14:52:30 -0500; Sure, you send me an amp for free, and I'll test it for free!! ;) N6OTQ Original Message: -- From: Jerry Flanders jflanders2@home.com To: <amps@contesting.com> Date: Thu, 20 Dec 2001 14:21:34 -0500 T; /archives//html/Amps/2001-12/msg00402.html (8,971 bytes)
91. [AMPS] HV Pole Pigs ++ (score: 1): Author: jstrohm@texas.net (Jim Strohm); Date: Thu, 20 Dec 2001 21:24:50 -0600; Scuse me? The Chinese fighter struck our spy plane in international air space. There was not a matter of our "playing chicken" with Chinese fighter jets. Please try to visualize a Mayflower moving va; /archives//html/Amps/2001-12/msg00422.html (10,201 bytes)
92. [AMPS] M/A Com fets (score: 1): Author: jstrohm@texas.net (Jim Strohm); Date: Fri, 21 Dec 2001 08:08:09 -0600; "Steve Thompson" <g8gsq@qsl.net> says ... Advanced Power Technology, Bend OR has an attractively priced line of RF FETs. Find them in google... Jim -- FAQ on WWW: http://www.contesting.com/FAQ/amps S; /archives//html/Amps/2001-12/msg00433.html (7,105 bytes)
93. [AMPS] M/A Com fets (score: 1): Author: jstrohm@texas.net (jstrohm@texas.net); Date: Fri, 21 Dec 2001 12:18:18 -0500; Steve Thompson g8gsq@qsl.net said... I think Motorola is the world leader in developing insanely great products and then mortally wounding themselves in the foot with their own marketing and executiv; /archives//html/Amps/2001-12/msg00443.html (8,050 bytes)
94. [AMPS] M/A Com fets ++ (score: 1): Author: jstrohm@texas.net (jstrohm@texas.net); Date: Fri, 21 Dec 2001 12:45:07 -0500; alex alex@sandlabs.com said -- If you feel that a monopoly exists, and that it is anticompetitive, tell it to the judge. Establishing that Richardson has a monopoly will be simple. Establishing that; /archives//html/Amps/2001-12/msg00445.html (9,106 bytes)
95. [AMPS] M/A Com fets ++ (score: 1): Author: jstrohm@texas.net (Jim Strohm); Date: Fri, 21 Dec 2001 17:57:43 -0600; Well, recently Varian has come under fire for what I'd call "unorthodox" HR practices. The defendants lost their case against Varian last week. Alex, you might take note -- one of the issues in the; /archives//html/Amps/2001-12/msg00453.html (8,858 bytes)
96. [AMPS] Silly monoband design (score: 1): Author: jstrohm@texas.net (Jim Strohm); Date: Fri, 21 Dec 2001 19:54:13 -0600; Here's a link to a pic of something I started building a LONG time ago, and buried at the bottom of the junk box. A few messages ago, I postulated a multi-module rack of monoband RF decks. This is a; /archives//html/Amps/2001-12/msg00454.html (7,371 bytes)
97. [AMPS] Tune/load caps (score: 1): Author: jstrohm@texas.net (Jim Strohm); Date: Fri, 21 Dec 2001 22:28:34 -0600; KG6DV@cs.com sez-- ARRL handbooks have an equation that allows guesstimating the value of a capacitor if you can measure plate number, area, and spacing. Here's a URL for a fun tool I got: http://www; /archives//html/Amps/2001-12/msg00461.html (7,759 bytes)
98. [AMPS] Coil Forms (score: 1): Author: jstrohm@texas.net (Jim Strohm); Date: Mon, 12 Nov 2001 09:00:09 -0600; Polystyrene rod, heated until it flows into the coil. Effective for QRP, sometimes given to flowing in QRO. You might consider pre-made porcelain coil forms, or custom make your own -- it's not part; /archives//html/Amps/2001-11/msg00194.html (8,782 bytes)
99. [AMPS] Need HV connectors (score: 1): Author: jstrohm@texas.net (jstrohm@texas.net); Date: Mon, 19 Nov 2001 12:33:21 -0500; How about hot-rod spark plug wire? This stuff is typically insulated past 50kV, can be had with a stranded metal conductor, and has high-voltage terminals available (called: spark plugs). Jim N6OTQ W; /archives//html/Amps/2001-11/msg00332.html (8,319 bytes)
100. [AMPS] Need HV connectors (score: 1): Author: jstrohm@texas.net (jstrohm@texas.net); Date: Mon, 19 Nov 2001 12:33:52 -0500; How about hot-rod spark plug wire? This stuff is typically insulated past 50kV, can be had with a stranded metal conductor, and has high-voltage terminals available (called: spark plugs). Jim N6OTQ W; /archives//html/Amps/2001-11/msg00333.html (8,328 bytes)

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