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201. [AMPS] mini Teflon coax, the white stuff (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 12 Feb 2002 08:26:15 -0800; .035" stuff with PL-259's installed, for me to provide to all the local "free banders?" It would be best if it was labeled (microscoping 1-point print is okay) "Super Range Extender Coax" or somethi; /archives//html/Amps/2002-02/msg00111.html (8,631 bytes)
202. [AMPS] Kenwood TS-440 and TL-922A hook up help (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 12 Feb 2002 13:48:42 -0800; Krish, Sounds like you may have confused the AMP KEY RELAY line with the REMOTE KEY line (or whatever these are actually called on a TS440S -- names vary, but I'm referring to functions). A remote ke; /archives//html/Amps/2002-02/msg00117.html (11,449 bytes)
203. [AMPS] Kenwood TS-440 and TL-922A hook up help (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 12 Feb 2002 14:16:36 -0800; (assuming your pin callouts here are correct, which they probably aren't). key line. in about 1990 or so), so I don't recall if one pin of the TX/RX/COM relay is grounded internally or not. But if i; /archives//html/Amps/2002-02/msg00119.html (14,953 bytes)
204. [AMPS] SB-230 plate transformer needed (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Thu, 14 Feb 2002 07:49:03 -0800; change to some other tube? I have a 2000VCT, 400mA CCS xfmr (heavy) which would provide 2.8 kV using a bridge & filter (115V primary), more than enough iron for a single tube, maybe too much voltage; /archives//html/Amps/2002-02/msg00137.html (8,017 bytes)
205. [AMPS] SB-220 Meter Movements (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Fri, 15 Feb 2002 07:57:02 -0800; could wire a 1A2 in series with the 3-500's. I thought that was common knowledge....<grin> WB2WIK/6 -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative; /archives//html/Amps/2002-02/msg00154.html (9,792 bytes)
206. [AMPS] AL811H on AM (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Fri, 15 Feb 2002 08:07:31 -0800; -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com; /archives//html/Amps/2002-02/msg00155.html (10,842 bytes)
207. [AMPS] AL811H on AM (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Fri, 15 Feb 2002 14:51:32 -0800; unhappy owner, is the set of obvious design deficiencies...including the tiny little (12.7 cfm) cooling fans which move air only across the glass envelopes, and cool nothing else; the horizontal tub; /archives//html/Amps/2002-02/msg00164.html (14,195 bytes)
208. [AMPS] Antenna tuner (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Wed, 20 Feb 2002 07:47:50 -0800; slow to adjust, requiring lots of rotations for a relatively small capacitance change. If the tuner includes a bridge and control circuitry, and a motor system to drive the capacitor, then I'd go fo; /archives//html/Amps/2002-02/msg00211.html (8,454 bytes)
209. [AMPS] HA-10 Conversion to 572B Tubes (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Thu, 21 Feb 2002 10:56:00 -0800; forget to change the cathode bias, too. And the filter caps/bleeders. I'd recommend getting rid of the silly little fan and installing a real fan, like a 120mm "boxer" fan... Pretty looking amplifie; /archives//html/Amps/2002-02/msg00218.html (8,704 bytes)
210. [Amps] Adequate Cooling Air for Four 811A's (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 25 Feb 2002 13:13:12 -0800; Won't that make the squirrels dizzy? Seriously, 811A's aren't "forced air cooled" tubes. I'd think a 120mm "muffin" type fan would be more than sufficient. Squirrel-cage fans (centrifugal blowers) a; /archives//html/Amps/2002-02/msg00273.html (7,831 bytes)
211. [Amps] Band Switch - Yaesu FL-2100Z ? (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Wed, 27 Feb 2002 11:28:54 -0800; Um... ...several knife switches mounted on a piece of plywood, strapped to the side of the amp? "Each success only buys an admission ticket to a more difficult problem." -- Henry Kissinger; /archives//html/Amps/2002-02/msg00307.html (8,146 bytes)
212. [AMPS] Chassis for HB Amps (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Wed, 2 Jan 2002 07:42:51 -0800; Although surplus rack mount chassis, stripped of all components, are often a good deal, the "off the shelf" Bud/Premier/etc chassis aren't cheap nor particularly strong. If the construction article g; /archives//html/Amps/2002-01/msg00012.html (9,428 bytes)
213. [AMPS] 1500 W Dummy Load Resistor (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Wed, 2 Jan 2002 07:46:29 -0800; [Steve Katz] Last I checked, Surplus Sales of Nebraska had these in stock... http://www.surplussales.com/ WB2WIK/6 -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com; /archives//html/Amps/2002-01/msg00013.html (7,706 bytes)
214. [AMPS] roller inductors (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Wed, 2 Jan 2002 07:53:33 -0800; Sure have. Have had many Henry amps, they all use roller inductors (3K-4K-etc). Advantage is being able to optimize "Q" at almost any frequency, including between amateur bands. Disadvantages include; /archives//html/Amps/2002-01/msg00014.html (8,293 bytes)
215. [AMPS] Chassis for HB Amps (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Wed, 2 Jan 2002 10:31:55 -0800; [Steve Katz] I found a local sheet metal shop that has CNC LASER metal cutting equipment. If I provide them with a dimensioned drawing they will use the LASER to cutom cut all the holes required for; /archives//html/Amps/2002-01/msg00018.html (8,960 bytes)
216. [AMPS] Chassis for HB Amps (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Wed, 2 Jan 2002 10:58:59 -0800; [Steve Katz] No, I seriously doubt it. Why would they? If you have CAD software (even AutoCAD, which is a very inexpensive program) and can download the CAD files to them via the internet, this save; /archives//html/Amps/2002-01/msg00020.html (8,639 bytes)
217. [AMPS] HB Chassis (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Wed, 2 Jan 2002 11:01:02 -0800; -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com; /archives//html/Amps/2002-01/msg00021.html (7,113 bytes)
218. [AMPS] Building new 4-1000A amp (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Thu, 3 Jan 2002 07:12:31 -0800; [Steve Katz] Or, the other answer might be that people are running a good deal more than 1500W output. (Shhh, don't tell anybody.) My 4-1000A grid-driven amp for 50 MHz runs 1500W output with <20W P; /archives//html/Amps/2002-01/msg00037.html (10,393 bytes)
219. [AMPS] Johnson 6N2 Thunderbolt (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 14 Jan 2002 07:36:02 -0800; $600 sounds like a great price, provided it's in good working condition, has good tubes, and has already had the HV filter cap replaced and other routine maintenance that is absolutely required to ke; /archives//html/Amps/2002-01/msg00098.html (7,975 bytes)
220. [AMPS] New to list. (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 15 Jan 2002 07:41:51 -0800; [Steve Katz] What amplifier is that, exactly? If not commercially made, then what's the circuit, intended frequency range, transistors used, voltage applied? How's it biased? [Steve Katz] "From an H; /archives//html/Amps/2002-01/msg00103.html (8,818 bytes)

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