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61. Re: [Amps] Svetlana (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Thu, 03 Dec 2009 11:56:26 -0500; Trademark issues. The Svetlana trademark is owned by someone other than Svetlana here in the US. Mike, W1NR _______________________________________________ Amps mailing list Amps@contesting.com http:; /archives//html/Amps/2009-12/msg00080.html (7,274 bytes)
62. Re: [Amps] Chimney's (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Thu, 14 Jan 2010 19:46:53 -0500; I don't think I've seen Teflon pipe in a size that big. If it is made, it is probably astronomically expensive. You are probably better off getting sheet and wrapping it into a tube. See www.smallpar; /archives//html/Amps/2010-01/msg00184.html (8,048 bytes)
63. Re: [Amps] DE-OX-IT (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Wed, 10 Mar 2010 05:47:35 -0500; Only if the defect is very thin. Most of the time I have found that gold plated contacts generally get melted away which is why solid silver is recommended. And silver oxide will still conduct RF. Mi; /archives//html/Amps/2010-03/msg00157.html (7,811 bytes)
64. Re: [Amps] liquid cooling (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Mon, 05 Apr 2010 17:19:45 -0400; I built a 6L6 (metal) transmitter using the tube upside down in a cup of mineral oil to get 75W input (the old novice limit). Ran like that all day and night long. Mike, W1NR ________________________; /archives//html/Amps/2010-04/msg00127.html (9,367 bytes)
65. Re: [Amps] Cleaning tubes (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Thu, 17 Jun 2010 13:37:14 -0400; I have always used near pure isopropyl alcohol, which I obtained from an electronics supply house, and Kleenex. You need to be real careful wiping to avoid removing the lettering but the pure alcohol; /archives//html/Amps/2010-06/msg00182.html (7,694 bytes)
66. Re: [Amps] Why no images allowed? (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Fri, 13 Aug 2010 14:48:16 -0400; Space for the archives is one issue but it is also to squelch spam, viruses and phishing, which usually use binaries or malware embedded in HTML. Mike, W1NR __________________________________________; /archives//html/Amps/2010-08/msg00193.html (7,691 bytes)
67. Re: [Amps] Tubes, made in the USA, in the olden days; Films? (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Mon, 30 Aug 2010 17:32:50 -0400; Rolling your own vacuum tubes: http://videosift.com/video/How-to-Make-Your-Own-Vacuum-Tubes Mike, W1NR _______________________________________________ Amps mailing list Amps@contesting.com http://lis; /archives//html/Amps/2010-08/msg00476.html (9,783 bytes)
68. Re: [Amps] Skin depth: silver plating of tank circuit coil feasible with chemical plating kits? (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Mon, 04 Oct 2010 08:06:14 -0400; The primary reason for silver plate, and that includes connectors, is that silver oxide is a much better conductor of RF than copper oxide. Therefore, the silver coating doesn't conduct much of the R; /archives//html/Amps/2010-10/msg00005.html (10,039 bytes)
69. Re: [Amps] 6146 via 572b's (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Tue, 12 Oct 2010 14:52:14 -0400; There is an amp in the Radio Handbook, forget which edition, that used a grid driven 4CX1500 that was designed as a companion to a 5W transmitter. I will try and look it up for you tonight. Mike, W1N; /archives//html/Amps/2010-10/msg00193.html (7,174 bytes)
70. Re: [Amps] GigaVac GH3 Vacuum Relays (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Fri, 07 Jan 2011 12:10:21 -0500; Gigavac relays are available to Ham Radio operators at a discount direct from Gigavac. See http://www.gigavac.com/products/relays/ham/index.htm. The GH1 is listed for $77 and is probably in stock. A; /archives//html/Amps/2011-01/msg00064.html (7,960 bytes)
71. Re: [Amps] Ebay selling CB amps (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Sat, 19 Feb 2011 16:43:56 -0500; eBay is not breaking the rules nor could they be held responsible. It is the seller who would be breaking the law. Several court cases have held eBay is not responsible for the doings of the sellers; /archives//html/Amps/2011-02/msg00145.html (7,900 bytes)
72. Re: [Amps] 2 more questions-- electrical (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Tue, 05 Apr 2011 14:09:46 -0400; 1. ALL GROUNDS MUST BE BONDED. This is an NEC requirement. In general I have ground rods near the cable entrances with the lightning suppressors attached. These are bonded via ground at the water met; /archives//html/Amps/2011-04/msg00183.html (11,260 bytes)
73. Re: [Amps] Where is power measured ? (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Wed, 06 Apr 2011 08:42:12 -0400; Broadcast stations power in many cases, especially digital TV, by ERP rather than TX power. I knew a QRP'er who had 5 watt amps at the antenna feedpoints to maximize ERP and eliminate feedline loss.; /archives//html/Amps/2011-04/msg00222.html (8,254 bytes)
74. Re: [Amps] YU-158 (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Thu, 14 Jul 2011 16:18:32 -0400; Those MRI units still need to be maintained. They put only so many hours on the tube and change them. Eimac will continue to make them until the demand no longer exists. Changing a part number is tab; /archives//html/Amps/2011-07/msg00162.html (7,759 bytes)
75. Re: [Amps] Death and funeral of Peter W. Dahl (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Fri, 19 Aug 2011 15:30:10 -0400; http://www.legacy.com/obituaries/elpasotimes/obituary.aspx?n=peter-dahl&pid=153171917 73 de Mike, W1NR, SK _______________________________________________ Amps mailing list Amps@contesting.com http:/; /archives//html/Amps/2011-08/msg00094.html (7,097 bytes)
76. Re: [Amps] Customs drilled a hole in my GU74b / 4CX800s (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Thu, 01 Mar 2012 14:44:48 -0500; Beryllium oxide is not a problem if it remains a solid mass. However, drilling or sawing it creates dust which it incredibly toxic if inhaled. Mike, W1NR _____________________________________________; /archives//html/Amps/2012-03/msg00013.html (7,372 bytes)
77. Re: [Amps] Cell phones, digital cameras and RF (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Tue, 06 Mar 2012 08:29:22 -0500; I just took some photos of my rather poorly shielded 4-1000 amplifier running key down carrier on 20M with my Nikon D90 and did not notice any issues at all. Neither have I seen issues with my Androi; /archives//html/Amps/2012-03/msg00064.html (10,162 bytes)
78. [Amps] RF coupling to 8877 filaments? (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Mon, 12 Mar 2012 13:33:47 -0400; I am in the process of building an 8877 amp and through the course of comparing various designs I came across one in Orr's Handbook where the input RF was coupled to the filaments with .01 capacitors; /archives//html/Amps/2012-03/msg00145.html (6,759 bytes)
79. Re: [Amps] Who still sells HV Capacitors (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Thu, 12 Apr 2012 10:14:31 -0400; I got a quote from one company (I won't mention names), 30uF 5KVDC, $1495. I consider that ridiculous. RF Parts also replied that they can no longer supply the caps they were selling. Mike, W1NR ____; /archives//html/Amps/2012-04/msg00110.html (8,548 bytes)
80. Re: [Amps] 8877 rebuild (score: 1): Author: "Mike McCarthy, W1NR" <lists@w1nr.net>; Date: Fri, 12 Oct 2012 09:40:33 -0400; Don't think you will find anyone that rebuilds these as they are not expensive enough to justify. When new Chinese tubes are under $700 and pulls are plentiful under $350 you do have many other choic; /archives//html/Amps/2012-10/msg00074.html (7,156 bytes)

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