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Total 30 documents matching your query.

1. [Amps] 20kw Dummy load? (score: 1): Author: Robin Szemeti <list@redpoint.org.uk>; Date: Thu, 12 Aug 2004 22:06:23 +0100; Hi, I need to use / beg / borrow / steal a decent dummy load to test this amplifier out .. running into its intended load I've had a couple of DC flashovers *somewhere* and I'd like to run the amp up; /archives//html/Amps/2004-08/msg00115.html (7,601 bytes)
2. Re: [Amps] 20kw Dummy load? (score: 1): Author: peter.chadwick@Zarlink.Com; Date: Fri, 13 Aug 2004 09:26:07 +0200; Robin was asking about water cooling resistors. The old metal film ones from Electrosil in the UK which were 50 watts in air were used professionally at 30kW. If I remember correctly (and it was 40 y; /archives//html/Amps/2004-08/msg00120.html (7,758 bytes)
3. Re: [Amps] 20kw Dummy load? (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Fri, 13 Aug 2004 11:56:07 -0400; Dear Robin, Since you're UK-based, it would do no good to suggest US suppliers... However, UK-based television stations, when they do an annual POP or xmtr alignment, will rent a portable DL from som; /archives//html/Amps/2004-08/msg00125.html (8,664 bytes)
4. Re: [Amps] 20kw Dummy load? (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Sat, 14 Aug 2004 17:01:35 +0100; I have a 5 kW continuous one sitting in my garage, which would probably do for 5 minutes, with forced air cooling, but since its not mine, and I don't know it would, I won't loan it to you. I recon l; /archives//html/Amps/2004-08/msg00127.html (9,597 bytes)
5. Re: [Amps] 20kw Dummy load? (score: 1): Author: "Barry Kirkwood" <bjk@ihug.co.nz>; Date: Sun, 15 Aug 2004 01:13:04 -0000; Carbon resistor and dry ice.....(or maybe it would turn into a superconductor) 73 Baz end Barry Kirkwood PhD ZL1DD Signal Hill Homestay 66 Cory Road Palm Beach Waiheke Island 1240 NEW ZEALAND ph/fax; /archives//html/Amps/2004-08/msg00129.html (11,181 bytes)
6. Re: [Amps] 20kw Dummy load? (score: 1): Author: Alek Petkovic <vk6apk@eon.net.au>; Date: Sun, 15 Aug 2004 12:31:56 +0800; The way we Aussies do it is to fill a 44 gallon drum with slightly salted water. A couple of hefty electrodes are immersed in the solution and connected to the transmitter and amplifier to be tested.; /archives//html/Amps/2004-08/msg00131.html (11,827 bytes)
7. Re: [Amps] 20kw Dummy load? (score: 1): Author: frank_goenninger@t-online.de (Frank Goenninger); Date: Sun, 15 Aug 2004 11:58:47 +0200; That method really calls for a "20kW Dummy Load Test Weekend" - You organize the lobsters and I bring the beer. Who volunteers to bring the Amp and TRX? It's only that I have to book the flights and; /archives//html/Amps/2004-08/msg00132.html (8,482 bytes)
8. Re: [Amps] 20kw Dummy load? (score: 1): Author: Larry Carman <lncarman@swbell.net>; Date: 15 Aug 2004 06:15:30 -0500; Frank wont need to book a flight. When the final amp blows, the lobsters may be served at his home QTH as well as many others. Oh, by the way, what kind of bear do they drink in the 'down under'? Reg; /archives//html/Amps/2004-08/msg00133.html (9,331 bytes)
9. Re: [Amps] 20kw Dummy load? (score: 1): Author: "donii@sympatico.ca" <donii@sympatico.ca>; Date: Sun, 15 Aug 2004 09:24:32 -0400; RE: Aussi dummy load Questions : after delecting ur crustaceans who pays for the cracked or melted finals?? VE2FAR Peter _______________________________________________ Amps mailing list Amps@contest; /archives//html/Amps/2004-08/msg00135.html (7,563 bytes)
10. [Amps] 20kw Dummy load? (score: 1): Author: Will Matney <craxd1@ezwv.com>; Date: Sun, 15 Aug 2004 10:43:13 -0400; Robin, Lo and behold, God help me for telling this one. You might just try using saltwater in a tank for that load you need. I seen a dummy load built with two electrodes sticking in salt water. The; /archives//html/Amps/2004-08/msg00137.html (9,850 bytes)
11. Re: [Amps] 20kw Dummy load? (score: 1): Author: Tony King <amps@w4zt.com>; Date: Sun, 15 Aug 2004 19:23:17 -0400; Robin, What frequency do you want to use to test the amp? You said you wanted a 50 ohm, 50 MHz load. You could use 20 can style 1 KW dummy loads with a power divider made from 39 inch lengths (quarte; /archives//html/Amps/2004-08/msg00149.html (10,034 bytes)
12. Re: [Amps] 20kw Dummy load? (score: 1): Author: Robin Szemeti <robin@redpoint.org.uk>; Date: Wed, 22 Sep 2004 23:53:27 +0100; hmmm ... just remember a pair of 4cx250s puts out at best 700w on 2m, this is a 20KW device ... a 3CX15000 ... think about the dissipation, in a lossy line it will be exponential .... so if 100m had; /archives//html/Amps/2004-09/msg00416.html (7,850 bytes)
13. Re: [Amps] 20kw Dummy load? (score: 1): Author: R.Measures <r@somis.org>; Date: Wed, 22 Sep 2004 17:55:36 -0700; On Sep 22, 2004, at 3:53 PM, Robin Szemeti wrote: On Saturday 14 August 2004 17:01, Dr. David Kirkby wrote: Do you have access to a large drum of coax, just capable of taking the power? Then a long l; /archives//html/Amps/2004-09/msg00417.html (8,675 bytes)
14. Re: [Amps] 20kw Dummy load? (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Wed, 22 Sep 2004 21:03:17 -0400; Dear Robin, I sure wish I kept a copy of the photo that was circulating around Bechtel this past winter showing the result of a coax fire that started at the base of a monopole and flared out through; /archives//html/Amps/2004-09/msg00420.html (9,717 bytes)
15. Re: [Amps] 20kw Dummy load? (score: 1): Author: Steve Thompson <g8gsq@ic24.net>; Date: Thu, 23 Sep 2004 10:06:38 +0100; http://www.johnsradio-uk.com/products.asp Bird 8645 25kW self contained beast. Already a snip but expect 15-20% off if you haggle with cash. In comparison with what you're testing, and the time other; /archives//html/Amps/2004-09/msg00423.html (8,921 bytes)
16. Re: [Amps] 20kw Dummy load? (score: 1): Author: "DF3KV" <df3kv@aol.com>; Date: Thu, 23 Sep 2004 11:16:27 +0200; If somebody is looking for large dummyloads, there are 25 and 50KW versions on sale in Germany: http://www.singer-elektronik.de/fix/she.html 73 Peter _______________________________________________ A; /archives//html/Amps/2004-09/msg00424.html (7,277 bytes)
17. Re: [Amps] 20kw Dummy load? (score: 1): Author: craxd <craxd1@ezwv.com>; Date: Thu, 23 Sep 2004 11:50:41 -0400; Hal, Well, if you think about it, most plastics are petroleum based and will burn like crude oil. Just like an old tire burning, black smoke and all. I would have liked to had the picture. That could; /archives//html/Amps/2004-09/msg00427.html (8,784 bytes)
18. Re: [Amps] 20kw Dummy load? (score: 1): Author: Tony King <amps@w4zt.com>; Date: Thu, 23 Sep 2004 14:02:29 -0400; The picture you're looking for is located here: <http://www.bext.com/_CGC/pictures/celltowerfire.jpg> and a copy of it on my web page here: <http://w4zt.com/images/celltowerfire.jpg> It was reportedl; /archives//html/Amps/2004-09/msg00429.html (10,919 bytes)
19. Re: [Amps] 20kw Dummy load? (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Thu, 23 Sep 2004 22:27:15 +0100; Robin Szemeti wrote: On Saturday 14 August 2004 17:01, Dr. David Kirkby wrote: Do you have access to a large drum of coax, just capable of taking the power? Then a long length of it would become loss; /archives//html/Amps/2004-09/msg00431.html (11,039 bytes)
20. Re: [Amps] 20kw Dummy load? (score: 1): Author: "DF3KV" <df3kv@aol.com>; Date: Fri, 24 Sep 2004 01:05:35 +0200; over a may I was using length of RG141A/U connected to a smaller Bird dummyload, sunk both into a bathtub, works pretty well. Connectors are crimped N, did that with up to 6KW on a 70cm amp, RG141 w; /archives//html/Amps/2004-09/msg00433.html (8,412 bytes)

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