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261. Re: [Amps] High SWR, (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Wed, 22 Apr 2009 22:12:27 -0400; The power really is on the line, but as you say, it's not dissipated in the finals. The easiest way to explain, or rather the simplest analogy is to think of a lossless coax and a resistive mismatch.; /archives//html/Amps/2009-04/msg00229.html (9,215 bytes)
262. Re: [Amps] High SWR (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Thu, 23 Apr 2009 04:39:01 -0400; Why not. I typically have been using LMR-400 on center fed dipoles for 75 and a half sloper on 160 across the entire bands with the aid of a tuner at the rig end of the coax and using an Alpha to pum; /archives//html/Amps/2009-04/msg00241.html (10,708 bytes)
263. Re: [Amps] High SWR (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Thu, 23 Apr 2009 17:39:27 -0400; I am not exceeding the manufacturers ratings. NOTE: Times Wire ratings on their page. For example, LMR-240: Peak Voltage rating 1500, power max 5.6 KW LMR-400: Peak Voltage rating 2500, power max 16K; /archives//html/Amps/2009-04/msg00292.html (10,160 bytes)
264. Re: [Amps] High SWR (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Fri, 24 Apr 2009 00:23:08 -0400; I would say it's more important with digital than with analog. Digital, like the analog TV does not do well with those waves running up and down the line. At least, unlike networks you don't have to; /archives//html/Amps/2009-04/msg00302.html (10,306 bytes)
265. Re: [Amps] High SWR (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Fri, 24 Apr 2009 00:27:13 -0400; And I've never seen one that didn't radiate...however I have to be careful and define radiation. Even with a well balanced line there is a strong field around it that extends out some number of feet; /archives//html/Amps/2009-04/msg00303.html (12,568 bytes)
266. Re: [Amps] Junk Connectors (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Fri, 24 Apr 2009 00:31:25 -0400; I never, ever go for used connectors. I don't even reuse them at home. Complete with Nickel plating. I had one around here with no threads. Didn't it though. Now there are a few more who should<:-)); /archives//html/Amps/2009-04/msg00304.html (10,844 bytes)
267. Re: [Amps] SWR & OPEN WIRE (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Fri, 24 Apr 2009 00:38:51 -0400; Just get one of the new solid state KWs. You gain a new appreciation for keeping the SWR LOW.<:-)) 3:1? How about finding the amp kicks out at 1.3:1, or rolls back the output by 300 or 400 watts. Tha; /archives//html/Amps/2009-04/msg00305.html (8,732 bytes)
268. [Amps] The AV640 saga continues with a new? Problem. (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Sat, 25 Apr 2009 14:26:07 -0400; Hi SWR would be appropriate for the subject title, but I figured no one would read it. :-D I finally was able (got around to it) to lower the 40' tower with the AV640. The new arrangement makes this; /archives//html/Amps/2009-04/msg00348.html (11,029 bytes)
269. Re: [Amps] The AV640 saga continues with a new? Problem. (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Sat, 25 Apr 2009 16:36:32 -0400; Oops! Sorry, wrong reflector. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2009-04/msg00352.html (8,602 bytes)
270. [Amps] Needed 56 pf transmitting molded mica cap (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Sat, 02 May 2009 17:07:40 -0400; Where I can find a "relatively small" 56 pf molded mica transmitting cap? Although it's for an antenna matching unit (the AV640) which I want to beef up a bit, I figured the Amps reflector would be a; /archives//html/Amps/2009-05/msg00002.html (6,696 bytes)
271. Re: [Amps] Transmitting MICA caps resources (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Mon, 04 May 2009 14:30:24 -0400; Yes it does. Like the ones I have the transmitting Mica caps are all too large and I didn't see any of the old flat style, but I did find some ceramic doorknobs at a reasonable price that will give m; /archives//html/Amps/2009-05/msg00007.html (7,175 bytes)
272. Re: [Amps] HV switch-mode power supply (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Fri, 22 May 2009 21:57:50 -0400; Just another reason not to live in California. <:-)) Here in Michigan, with all fees included it's about 10 cents per KWh. Admittedly our winter days are pretty short and a tad chilly with lots of cl; /archives//html/Amps/2009-05/msg00160.html (8,593 bytes)
273. Re: [Amps] HV switch-mode power supply (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Sat, 23 May 2009 14:51:39 -0400; This reminds me of a W/K 5 that was on six meters during the last peak. He did have a very big signal, but man was it broad. Of course when any one mentioned it, he'd go into a tirade about their rec; /archives//html/Amps/2009-05/msg00174.html (11,663 bytes)
274. Re: [Amps] HV switch-mode power supply (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Sat, 23 May 2009 15:55:58 -0400; I assume that is real costs with the purchase and installation amortized over 20 years or so? In the SW you should see a payback of 10 to 15 years. Less than 10 in some locations. In Michigan we aren; /archives//html/Amps/2009-05/msg00175.html (13,638 bytes)
275. Re: [Amps] Silver Epoxy Needed (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Wed, 27 May 2009 15:06:17 -0400; I used to use a lot of these transmitting doorknobs in high powered systems to adjust frequency. It was not uncommon to blow them apart. All that I "swept up" had been soldered.. This following is wh; /archives//html/Amps/2009-05/msg00215.html (9,234 bytes)
276. Re: [Amps] Amp design tutorial online? (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Wed, 27 May 2009 16:44:43 -0400; Thanks for bringing that up. Yes, it is on the web site although it may take a search of the web site to find it. Just enter "care and feeding" into the search web site and a PDF comes up http://www.; /archives//html/Amps/2009-05/msg00216.html (9,273 bytes)
277. Re: [Amps] Doorknob Caps Needed (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Wed, 27 May 2009 17:08:39 -0400; What? You aren't willing to sacrifice your wife's oven for an experiment to gain knowledge. Besides you may save the life of a $7 cap and it'll only cost $300-$500 to do so. <:-)) Well, then there's; /archives//html/Amps/2009-05/msg00220.html (7,987 bytes)
278. Re: [Amps] Centurion (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Wed, 27 May 2009 22:46:27 -0400; My Alpha 76 has been in a similar location for a good 12 to 14 years. No problems so far although the aux fan on the back is getting noisy. It's been said you can't damage the amp from too much air f; /archives//html/Amps/2009-05/msg00231.html (8,404 bytes)
279. Re: [Amps] Silver epoxy yes (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Fri, 29 May 2009 14:48:33 -0400; Or it might have to do with trying to find technical information on something on Google for hours and being directed to commercial sites instead of informative ones. OTOH there is so much misinformat; /archives//html/Amps/2009-05/msg00260.html (12,518 bytes)
280. Re: [Amps] Silver epoxy yes (score: 1): Author: Roger <sub1@rogerhalstead.com>; Date: Fri, 29 May 2009 17:51:44 -0400; How about mixing them?<:-)) Actually that is a serious question. I use both in building computers although I believe "Aritic Silver" is both a great heat conductor and conductor. You sure don't want; /archives//html/Amps/2009-05/msg00262.html (15,754 bytes)

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