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61. [AMPS] Clipperton L amplifier (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Fri, 19 Jan 2001 12:16:49 -0800; Maybe an oscillation near the operating frequency -- not a VHF parasitic? 73, Vic, K2VCO Fresno CA -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative re; /archives//html/Amps/2001-01/msg00507.html (8,910 bytes)
62. [AMPS] FCC & online Auctions (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Wed, 24 Jan 2001 18:35:00 -0800; Http://page.auctions.yahoo.com/auction/48826912 I put the colon in there so the link will work, because everyone has GOT to see this. It's a relatively low=powered device (3 x 4-1000a), but the style; /archives//html/Amps/2001-01/msg00598.html (8,778 bytes)
63. [AMPS] FCC & online Auctions (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Wed, 24 Jan 2001 21:48:45 -0800; No problem...you can get 75% efficiency in class C. Gives 'em a distinctive sounding signal, too. 73, Vic, K2VCO Fresno CA -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesti; /archives//html/Amps/2001-01/msg00609.html (8,757 bytes)
64. [AMPS] Low Pass Filter (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Fri, 01 Dec 2000 14:18:32 -0800; Well, this isn't very quantitative, and I don't remember where I saw it, but someone recently DID try this in various forms and found it to be essentially worthless. 73, Vic, K2VCO Fresno CA -- FAQ o; /archives//html/Amps/2000-12/msg00027.html (7,462 bytes)
65. [AMPS] AL-1200 Blower (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Wed, 06 Dec 2000 11:01:25 -0800; With a solid-state amp, it's easy to mount a thermostat on the heatsink. With tubes, it's more complicated...how about a thermostat clamped to the tube anode cooler? Isolation from the HV would be in; /archives//html/Amps/2000-12/msg00097.html (8,940 bytes)
66. [AMPS] Plate Choke for SB-1000 (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sat, 09 Dec 2000 19:33:24 -0800; Order an AL80B choke from Ameritron (about $25 last time I checked). It will work fine on all bands, including WARC (but it won't hurt to check for resonances before firing up). 73, Vic, K2VCO Fresno; /archives//html/Amps/2000-12/msg00169.html (7,227 bytes)
67. [AMPS] DC Filaments??? (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Thu, 02 Nov 2000 07:31:47 -0800; With the advent of radially-finned anodes this advice is out of date. Tubes should only be swapped from back to front! 73, Vic, K2VCO Fresno CA -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submi; /archives//html/Amps/2000-11/msg00021.html (8,783 bytes)
68. [AMPS] FS Heathkit SB-1000 pickup central CA (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Thu, 09 Nov 2000 07:10:48 -0800; For sale, Heathkit SB-1000 amplifier. It has a single 3-500Z, good for about 800 watts CW or 1000 watts PEP on SSB from 160 through 10 meters. This amp has a vacuum relay t/r circuit added for fast,; /archives//html/Amps/2000-11/msg00089.html (7,467 bytes)
69. [AMPS] 240VAC Amplifier Wiring (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Tue, 14 Nov 2000 08:21:15 -0800; I'm using the 'two phases + ground' configuration because I want my amp to also work overseas where there is no 115v neutral-hot circuit available. Since no current is supposed to flow in a ground,; /archives//html/Amps/2000-11/msg00132.html (8,995 bytes)
70. [AMPS] grounds (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Fri, 17 Nov 2000 11:59:48 -0800; The ground is local. At my house, it was just a poor connection to a water pipe! I drove my own rod to improve it. As I understand it, the power company also has a ground rod at the distribution tran; /archives//html/Amps/2000-11/msg00196.html (8,545 bytes)
71. [AMPS] Hi Power Connectors (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Tue, 21 Nov 2000 07:10:33 -0800; I think the "UHF" connectors are great, appropriate technology for 1-2 KW HF applications, as long as you waterproof them. Properly installed, there's nothing junky about them. Actually, in my experi; /archives//html/Amps/2000-11/msg00259.html (8,757 bytes)
72. [AMPS] Good service from Henry (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sun, 26 Nov 2000 08:50:20 -0800; I'd like to report a good experience I had this week: last weekend, my Henry SS750HF solid-state amplifier quit working on 80/160 meters. I determined that a 3 db pad that is switched in on those ban; /archives//html/Amps/2000-11/msg00375.html (6,788 bytes)
73. [AMPS] a sticky issue. (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Fri, 13 Oct 2000 10:41:39 -0700; Yes. Just talk about technical issues. Not about motives, character, personal habits, veracity, etc. How can this be so hard? 73, Vic, K2VCO Fresno CA -- FAQ on WWW: http://www.contesting.com/FAQ/amp; /archives//html/Amps/2000-10/msg00284.html (7,669 bytes)
74. [AMPS] High-SWR protection (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 30 Oct 2000 07:29:22 -0800; By 'properly sequenced' I presume you mean that the output relay closes before the input relay and opens after it. But even in this case, dropping the amp relay line hot-switches the input relay. I a; /archives//html/Amps/2000-10/msg00677.html (10,120 bytes)
75. [AMPS] SB1000 HELP! (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Fri, 01 Sep 2000 10:37:06 -0700; Corona effects are a result of potential gradient, not just voltage. A very sharp point is more likely to start a corona discharge than a rounded conductor. 73, Vic, K2VCO Fresno CA -- FAQ on WWW: ht; /archives//html/Amps/2000-09/msg00033.html (7,450 bytes)
76. [AMPS] SB1000 parasite question for Tom and Rich (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Thu, 03 Aug 2000 17:17:25 -0700; I agree, I've seen exactly this in an AL80B whose 3-500Z had a grid/cathode short. 73, Vic, K2VCO Fresno CA -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administ; /archives//html/Amps/2000-08/msg00067.html (7,952 bytes)
77. [AMPS] SB1000 parasite question for Tom and Rich (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Thu, 03 Aug 2000 19:58:52 -0700; I'm not sure of the mechanism. There is certainly part of the grid which is not touching the filament, and the whole structure has a certain amount of inductance, allowing for some voltage to appear; /archives//html/Amps/2000-08/msg00072.html (8,169 bytes)
78. [AMPS] Pride amp (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Fri, 18 Aug 2000 10:40:17 -0700; Actually, I run 800 watts day in and day out on the ham bands. My driver is an Elecraft K2, which is capable of about 10w of clean output. The moronic FCC rule about overall gain just complicates thi; /archives//html/Amps/2000-08/msg00350.html (7,584 bytes)
79. [AMPS]Solid state Amps (not a cb amp) (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Thu, 31 Aug 2000 08:18:47 -0700; I'm using a Henry SS750. It puts out at least 750 watts key down on all bands 160-10, but it likes to work into an impedance somewhat lower than 50 ohms on 20 meters and up (35 or so seems to be abou; /archives//html/Amps/2000-08/msg00575.html (8,682 bytes)
80. [AMPS] Freeband?? (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Thu, 31 Aug 2000 08:41:35 -0700; I was looking at some of the CB amp websites, and in one case the manufaturer bragged that his amps were very efficient, because...they operate CLASS C!! I guess they'd probably work fine for CW, tho; /archives//html/Amps/2000-08/msg00578.html (7,144 bytes)

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