Mail Archive Search: <+from:david.kirkby@onetel.net>

Results:

References: [ +from:david.kirkby@onetel.net: 467 ]

Total 467 documents matching your query.

181. Re: [Amps] CW and High Voltage (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Tue, 06 Sep 2005 08:41:03 +0100; I don't think that is a good definition. For a start, the subjects says "CW" for which you don't need a linear amplifier anyway. But consider the amplifier is for SSB use, for which it should be line; /archives//html/Amps/2005-09/msg00065.html (10,030 bytes)
182. Re: [Amps] Screen Supply for 4CX250 series (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Mon, 12 Sep 2005 01:15:46 +0100; The MTBF's on hard drives are quoted in an odd manner (well odd to me anyway), but I guess it has some logic to it. A decent SCSI hard drive will have an MTBF of over 1 million hours, but this does *; /archives//html/Amps/2005-09/msg00094.html (8,900 bytes)
183. Re: [Amps] Screen Supply for 4CX250 series (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Mon, 12 Sep 2005 21:59:03 +0100; I am well aware of that - the M in MTBF stands for mean, which is a statistical term. The guarantee is typically 3 years, which is very different from the 57 years MTBF. The MTBF on some SCSI drives; /archives//html/Amps/2005-09/msg00102.html (11,904 bytes)
184. Re: [Amps] MTBF Thread... (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Wed, 14 Sep 2005 12:22:25 +0100; Someone had a disk failure, and asked the question "how do they get those huge MTBS's" or similar. I replied they (MTBF's which seem to vary between 500,00 and 1.4 million hours) assume you replace t; /archives//html/Amps/2005-09/msg00115.html (10,116 bytes)
185. Re: [Amps] Alpha releases New Amp 9500 (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Fri, 16 Sep 2005 18:44:34 +0100; Yes, I think so. I have access to a range of *desktop* computers from < 1 year old to about 20 years old. The two interfaces they *all* have in common is RS-232 and 10-base-T ethernet. Some have USB,; /archives//html/Amps/2005-09/msg00152.html (10,725 bytes)
186. Re: [Amps] Alpha releases New Amp 9500 (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Sat, 17 Sep 2005 05:39:08 +0100; You are missing the point. If the only criteria is working with current PCs, then USB would be the way to go. That is why scanners, printers and other low-cost items use USB. In the case of an expens; /archives//html/Amps/2005-09/msg00163.html (10,797 bytes)
187. Re: [Amps] Alpha releases New Amp 9500 (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Sat, 17 Sep 2005 12:16:48 +0100; Good point. I never thought of that. Perhaps, I don't know. The fact still remains RS-232 has been around a long time, and shows no immediate sign of disappearing. Another option, which might satisfy; /archives//html/Amps/2005-09/msg00166.html (8,756 bytes)
188. Re: [Amps] Alpha releases New Amp 9500 (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Sat, 17 Sep 2005 22:23:54 +0100; Where do you want to start Keith? Here's a short list, ranging from the cheap (600 VA USP) to the expensive (cesium beam primary frequency standard). You will note most are products aimed at a profes; /archives//html/Amps/2005-09/msg00179.html (11,203 bytes)
189. Re: [Amps] Alpha 87A Question (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Sat, 17 Sep 2005 22:30:50 +0100; Parasitic oscillation!! They get blamed for everything on here, but perhaps even they are not that troublesome. Is sounds like something has probably shorted the incoming mains supply to me. I suspec; /archives//html/Amps/2005-09/msg00180.html (7,562 bytes)
190. Re: [Amps] Alpha releases New Amp 9500 (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Sat, 17 Sep 2005 23:34:59 +0100; I am sure the ham radio market will switch to the more modern interfaces, and be quite happy to sell you another rig/amp or whatever when the "modern" interface becomes defunct. That sort of thing wo; /archives//html/Amps/2005-09/msg00182.html (9,021 bytes)
191. Re: [Amps] Alpha 87A Question (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Sun, 18 Sep 2005 02:01:33 +0100; If I understand the orginal poster correctly, the amp made the "incredible bang" when it was "Off". That I take as meaning the power switch was in the Off position. Perhaps I misunderstood the meanin; /archives//html/Amps/2005-09/msg00190.html (9,186 bytes)
192. Re: [Amps] RS-232 and stuff.... (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Sun, 18 Sep 2005 02:37:29 +0100; I think this has been beaten into the ground somewhat. It's clear some like USB, its clear Agilent/Tektronix are using it, it is also clear a lot of professional kit (including some from Agilent) is; /archives//html/Amps/2005-09/msg00191.html (8,400 bytes)
193. Re: [Amps] Alpha releases New Amp 9500 (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Sun, 18 Sep 2005 12:40:41 +0100; And furthermore how often does one need to update the software? If it takes 15 minutes (which I doubt) and new software releases are released every month (which I doubt), it is not really a problem?; /archives//html/Amps/2005-09/msg00204.html (9,155 bytes)
194. Re: [Amps] Alpha 87A Question (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Mon, 19 Sep 2005 00:41:46 +0100; I can't help feel you have not looked hard enough. For something to flash like that, it must leave some indication of where it happened. From what others have said here many times, there can be probl; /archives//html/Amps/2005-09/msg00218.html (9,537 bytes)
195. Re: [Amps] Finger stock supplier (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Wed, 21 Sep 2005 06:04:01 +0100; I've bought it from Richardson electronics, but that was over 10 years ago, so no idea of cost. Someone else has commented it was expensive. You might like to look at RS or Farnell in the UK. They se; /archives//html/Amps/2005-09/msg00249.html (9,264 bytes)
196. Re: [Amps] amp humor (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Tue, 11 Oct 2005 06:37:19 +0100; Some of you might have seen this before, but a rather funny eBay auction for an amp. http://www.g8wrb.org/useful-stuff/ebay-auctions/bad-amplifier.pdf Also rather amuzing on my site is the article on; /archives//html/Amps/2005-10/msg00266.html (7,294 bytes)
197. Re: [Amps] G3SEK Tetrode Board (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Thu, 03 Nov 2005 01:42:08 +0000; Yes, I done that and had no hassle at all. (At least collecting the components, I have never fired it up). Since I wanted to put the board in an amp I knew would run quite warm (since it was conducti; /archives//html/Amps/2005-11/msg00038.html (7,800 bytes)
198. Re: [Amps] Meaning of "conduction cooled" (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Thu, 03 Nov 2005 19:26:53 +0000; There are 3 ways for something to cool - conduction, convection and radiation. See for example http://www.mansfieldct.org/schools/mms/staff/hand/convcondrad.htm Radiation (electromagnetic) is unique; /archives//html/Amps/2005-11/msg00054.html (10,240 bytes)
199. Re: [Amps] Meaning of "conduction cooled" (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Thu, 03 Nov 2005 20:49:20 +0000; I had a few email exchanges with Reid at Eimac about CC tubes. Apparently they do run a lot warmer (typically) and so their life is shorter than air-cooled tubes. The manufacturing cost is higher - m; /archives//html/Amps/2005-11/msg00057.html (11,623 bytes)
200. Re: [Amps] Grounded Screen 4CX1500B (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Mon, 07 Nov 2005 18:48:37 +0000; Many moons ago (10~15 years) a friend G8WYI and I built an amp with a pair of 4CX1000A's on 2m. The unit never did perform properly and is sitting in my garage in a pretty much useless state. The scr; /archives//html/Amps/2005-11/msg00098.html (10,409 bytes)

Current List: 181 - 200
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]