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321. Re: [Amps] Open Reply to Steve Cook (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Sat, 28 Feb 2009 15:42:42 -0500; Will someone please get Steve to sit down and be quiet? 73, Pete N4ZR _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinf; /archives//html/Amps/2009-02/msg00738.html (11,093 bytes)
322. Re: [Amps] item that was for sale good luck shipping (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Sun, 15 Mar 2009 12:03:33 -0400; Doesn't matter if it's good science or not, if you ship the stuff without declaring it as PCBs, you could get burned legally, and if you do declare I doubt they will let you. 73, Pete N4ZR __________; /archives//html/Amps/2009-03/msg00420.html (11,962 bytes)
323. Re: [Amps] High SWR was SB-1000 tuning question (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Wed, 22 Apr 2009 16:54:53 -0400; You are missing out on a lot by limiting yourself this way, because the SB-220 is a great active antenna tuner. I routinely use mine on antennas cut for the low end of 80M up in what used to be calle; /archives//html/Amps/2009-04/msg00215.html (10,526 bytes)
324. Re: [Amps] High SWR (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Wed, 22 Apr 2009 17:39:22 -0400; Jeff, there's a huge difference between being conservative - a good thing, usually - and forgoing significant benefit because of a misconception. I love my SB-220 too, and I try very hard not to do d; /archives//html/Amps/2009-04/msg00217.html (10,371 bytes)
325. Re: [Amps] High SWR, (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Thu, 23 Apr 2009 06:34:06 -0400; Carl occasionally goes too far, but he also has forgotten more about amps (from a practical and repair perspective, especially) than most of us will ever learn. He's a valuable resource, and it would; /archives//html/Amps/2009-04/msg00243.html (12,713 bytes)
326. Re: [Amps] 50 MHz QSK relays for converted SB-220 (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Sun, 10 May 2009 17:21:28 -0400; I think the same really goes for the Kilovac equivalent. At least we both have a spare set of contacts ;^) 73, Pete _______________________________________________ Amps mailing list Amps@contesting.c; /archives//html/Amps/2009-05/msg00054.html (8,129 bytes)
327. [Amps] Checking relay timing with a scope (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Sat, 20 Jun 2009 15:52:10 -0400; I've only been doing this ham radio thing for 55 years, but until this year I never owned or even used an oscilloscope. I now have an old 15-MHz dual trace machine that works fine, and I'm trying to; /archives//html/Amps/2009-06/msg00083.html (6,951 bytes)
328. Re: [Amps] Checking relay timing with a scope (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Sun, 21 Jun 2009 11:14:33 -0400; It is dual trace, and it has choice of internal or external triggering. 73, Pete N4ZR _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com; /archives//html/Amps/2009-06/msg00088.html (8,878 bytes)
329. [Amps] W8JI (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Sun, 05 Jul 2009 16:05:22 -0400; Mention of Tom reminds me - I wrote to him a couple of weeks ago, and have not had a reply. Before I bug him with a follow-up, does anyone know whether he's out traveling or otherwise unable to respo; /archives//html/Amps/2009-07/msg00118.html (6,747 bytes)
330. Re: [Amps] Carbon film or metal oxide film resistors for low-power RF circuits? (score: 1): Author: Pete Smith N4ZR <n4zr@contesting.com>; Date: Sun, 16 Aug 2009 08:53:12 -0400; The eraser on the end of a pencil also works well, if you have contrived a way to hold the PC board stably. I find tweezers are lamentably prone to launching SMT parts into low earth orbit, never to; /archives//html/Amps/2009-08/msg00326.html (15,486 bytes)
331. [Amps] Tuning the SB-220 was: Re: SB-220 bias question (score: 1): Author: Pete Smith N4ZR <n4zr@contesting.com>; Date: Sat, 29 Aug 2009 10:16:34 -0400; I have had my SB-220 for about 10 years. It was meticulously built by a real old-timer. One of its true beauties is the relatively forgiving tuning - by putting index card behind the two capacitor kn; /archives//html/Amps/2009-08/msg00596.html (11,994 bytes)
332. Re: [Amps] Amplifier scenario question (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Thu, 17 Sep 2009 10:14:12 -0400; The older VFD wattmeter also has a VSWR alarm that lights an LED, and they had an add-in kit to provide a relay. Homebrewing the relay circuitry would be quite easy. 73, Pete N4ZR New Articles Daily; /archives//html/Amps/2009-09/msg00231.html (9,061 bytes)
333. Re: [Amps] Silver Plating Tank Coil ?? (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Sun, 20 Sep 2009 09:45:50 -0400; Shhh ... what if this gets out? Imagine all the audio cable manufacturers whose livelihood you will threaten. 73, Pete N4ZR New Articles Daily - the Contesting Compendium at http://wiki.contesting.co; /archives//html/Amps/2009-09/msg00255.html (8,573 bytes)
334. Re: [Amps] LK-500-NTC v. SB-220 v. Clipperrton L (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Mon, 05 Oct 2009 16:49:13 -0400; 73, Pete N4ZR New Articles Daily - the Contesting Compendium at http://wiki.contesting.com The World Contest Station Database, updated daily at www.conteststations.com The Reverse Beacon Network at; /archives//html/Amps/2009-10/msg00108.html (10,310 bytes)
335. Re: [Amps] AM7223 military amp (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Sun, 01 Nov 2009 16:37:58 -0500; Or better yet, start by googling "AM 7223 amplifier" - lots of hits 73, Pete N4ZR New Articles Daily - the Contesting Compendium at http://wiki.contesting.com The World Contest Station Database, upda; /archives//html/Amps/2009-11/msg00009.html (9,207 bytes)
336. Re: [Amps] Ameritron AL-1500 (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Tue, 16 Feb 2010 17:44:52 -0500; I'm not so sure. The grid trip circuit protecting the 8877's fragile grid is apt to drive a new op crazy. Why not an AL-1200 or even the 2X500Z amp? More to the point, Shon, it might make a lot more; /archives//html/Amps/2010-02/msg00446.html (9,487 bytes)
337. Re: [Amps] snubbing diodes for vac relays / notes. (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Thu, 11 Mar 2010 17:32:27 -0500; Why not just use a high voltage MOSFET to switch the bias, controlled with the same voltage that runs the input relay? 73, Pete N4ZR The World Contest Station Database, updated daily at www.contestst; /archives//html/Amps/2010-03/msg00176.html (11,692 bytes)
338. Re: [Amps] OT the 50 cent-ers (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Tue, 16 Mar 2010 10:19:22 -0400; Please, enough - back to amps. 73, Pete N4ZR The World Contest Station Database, updated daily at www.conteststations.com The Reverse Beacon Network at http://reversebeacon.net, blog at reversebeacon; /archives//html/Amps/2010-03/msg00300.html (9,256 bytes)
339. Re: [Amps] Good engineering (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Mon, 29 Mar 2010 15:01:09 -0400; I have read that in his testimony, the American in charge of Toyota USA (Exec VP?) said that their on-board computers had not been subjected to EMC testing. If that's the case, I wonder how many inci; /archives//html/Amps/2010-03/msg00811.html (10,993 bytes)
340. Re: [Amps] Now this here is a real ham's amp! (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Wed, 31 Mar 2010 06:13:27 -0400; The pictures look gorgeous - wonder why he couldn't test it, at least to the point of turning on the filaments and the HV? 73, Pete N4ZR The World Contest Station Database, updated daily at www.conte; /archives//html/Amps/2010-03/msg00934.html (8,271 bytes)

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