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101. Re: [Amps] 1306 (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Tue, 04 May 2010 19:47:46 +0800; Yeah. I knew that. Just testing. ha ha. 73 and thanks, Alek. VK6APK Crawling back into dark hole. http://www.qrz.com/db/vk6apk http://www.qrz.com/db/vk6ap ____________________________________________; /archives//html/Amps/2010-05/msg00050.html (8,652 bytes)
102. Re: [Amps] 3CX1500C7 Cavity (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Thu, 06 May 2010 20:13:55 +0800; G'day Glenn It is more than likely one of the units from the Siledis (spelling?) project of when they held the America's Cup off Fremantle here in Western Australia. They were pulse transmitters on 7; /archives//html/Amps/2010-05/msg00068.html (9,345 bytes)
103. Re: [Amps] Drake L-7 arcing on 80m (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Wed, 19 May 2010 06:26:33 +0800; G'day Bill Do as Carl suggests. A friend, VK6RK, had a L7 with the exact same symptom. In his case, you could actually hear the plates rubbing or touching when the amplifier was switched off as well.; /archives//html/Amps/2010-05/msg00185.html (10,589 bytes)
104. Re: [Amps] Henry Amp ?? (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Fri, 28 May 2010 07:29:03 +0800; Nah, it was on qth.com classifieds. It seems the guy has sold it because he is trying to sell his two spare tubes now. 73, Alek VK6APK http://www.qrz.com/db/vk6apk http://www.qrz.com/db/vk6ap _______; /archives//html/Amps/2010-05/msg00411.html (9,656 bytes)
105. Re: [Amps] Centurion plate current issue (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Tue, 08 Jun 2010 16:31:02 +0800; We had something similar at my club with a GU84B tube. When the tube warmed up, there was a connection between grid and cathode. It still worked but got very hot. Fault was not evident when tube was; /archives//html/Amps/2010-06/msg00083.html (9,039 bytes)
106. Re: [Amps] Centurion plate current issue (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Thu, 10 Jun 2010 07:47:43 +0800; Hi Gary. Sorry about my earlier post. I am unfamiliar with that amp and I presumed it was running tetrode/s. By your follow up, it is apparent that we are talking 3-500Z. Therefore my comments were p; /archives//html/Amps/2010-06/msg00104.html (9,943 bytes)
107. Re: [Amps] Here yah go (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Sun, 13 Jun 2010 06:52:03 +0800; Yeah, ask him if its been "Ohm'd" as well. If it hasn't, then it will be very hard to "Resist". Sorry, Alek. VK6APK http://www.qrz.com/db/vk6apk http://www.qrz.com/db/vk6ap __________________________; /archives//html/Amps/2010-06/msg00156.html (7,720 bytes)
108. Re: [Amps] 3-500Z blue glow on glass (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Sat, 03 Jul 2010 16:33:17 +0800; Yeah, interesting stuff. Does anyone know how the brown stains inside glass tubes come about. In particular, tubes like the 4-1000A or 833A. I've seen lots of broadcast pulls that still have excellen; /archives//html/Amps/2010-07/msg00043.html (13,053 bytes)
109. Re: [Amps] parasitic suppressor voodoo (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Fri, 16 Jul 2010 06:29:33 +0800; OK. Just a simple question from down under. Who, among all the subscribers on this list, knows how to do that? I'm not talking about cut and try methods. I'm talking about mathematics and tube spec s; /archives//html/Amps/2010-07/msg00137.html (11,223 bytes)
110. Re: [Amps] parasitic suppressor voodoo (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Sat, 17 Jul 2010 08:20:46 +0800; Thanks Carl. Most informative. I don't think I'll ever need to bother with it but it is of great interest nevertheless. I'm quite happy to "suck it and see" or "do as others have done" and hope for t; /archives//html/Amps/2010-07/msg00186.html (20,150 bytes)
111. Re: [Amps] 4CX1600B/GU91B (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Fri, 23 Jul 2010 17:17:25 +0800; Many people are looking for this tube. I dare say that there are plenty of them stashed away for rainy days but there are none for sale anywhere. I have a good one in my amplifier. It will become ava; /archives//html/Amps/2010-07/msg00226.html (8,739 bytes)
112. Re: [Amps] choke the question (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Fri, 30 Jul 2010 17:32:34 +0800; Yeah but then what would we do for fun? Alek. VK6APK http://www.qrz.com/db/vk6apk http://www.qrz.com/db/vk6ap _______________________________________________ Amps mailing list Amps@contesting.com htt; /archives//html/Amps/2010-07/msg00343.html (12,108 bytes)
113. [Amps] 7094 (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Thu, 12 Aug 2010 18:14:37 +0800; Anybody got a pair of 7094 tubes? Cheap? 73, Alek. VK6APK http://www.qrz.com/db/vk6apk http://www.qrz.com/db/vk6ap _______________________________________________ Amps mailing list Amps@contesting.co; /archives//html/Amps/2010-08/msg00181.html (6,385 bytes)
114. Re: [Amps] GI-7BT Amplifier Thoughts (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Sat, 28 Aug 2010 06:24:56 +0800; I'll second that. Raco's sockets for the GI7B and GS35B are just something else. What a craftsman. 73, Alek VK6APK http://www.qrz.com/db/vk6apk http://www.qrz.com/db/vk6ap ___________________________; /archives//html/Amps/2010-08/msg00414.html (9,233 bytes)
115. Re: [Amps] Using automatic tuner for Amp input (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Sun, 29 Aug 2010 21:04:20 +0800; G'day Bill, I just did a few calcs. We are gonna use the LDG 100AMP tuner in a gs35B amp. Let's assume it's 100 ohms. We need a cap whose Xc on 3.5MHz = 25 ohms. Xc = 1/2.pi.f.C, So C = 1820pF. Forgi; /archives//html/Amps/2010-08/msg00438.html (10,717 bytes)
116. Re: [Amps] Using automatic tuner for Amp input (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Sun, 29 Aug 2010 21:07:00 +0800; I forgot to add. This amp is a 160 - 10m job so we're really gonna have some big Farads sittin' there, aren't we? 73, Alek. http://www.qrz.com/db/vk6apk http://www.qrz.com/db/vk6ap __________________; /archives//html/Amps/2010-08/msg00439.html (11,654 bytes)
117. [Amps] Macaw PRM-1 (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Tue, 07 Sep 2010 14:37:07 +0800; I have a Macaw PRM-1 peak reading power/swr meter. From looking through the archives on this list, I see that others have been looking for manuals or schematics for this meter. It seems that this uni; /archives//html/Amps/2010-09/msg00034.html (7,758 bytes)
118. Re: [Amps] Macaw PRM-1 (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Tue, 07 Sep 2010 16:10:34 +0800; You are quite right Martin. If I get crazy and desperate for something to do, I might be tempted to do just that. It would not be too difficult. Can't do it right away as it is at my beach house qth; /archives//html/Amps/2010-09/msg00036.html (9,468 bytes)
119. Re: [Amps] GS-35b (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Thu, 09 Sep 2010 06:21:08 +0800; Undo the nut. Take off the spring washer and Belville washer and lift off the cooler. It should just fall away. 73, Alek VK6APK http://www.qrz.com/db/vk6apk http://www.qrz.com/db/vk6ap ______________; /archives//html/Amps/2010-09/msg00039.html (7,797 bytes)
120. Re: [Amps] GS-35b (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Thu, 09 Sep 2010 06:54:56 +0800; Yep. There is a very large and thick washer under the spring and intermediate washers. If you are stuck, just loosen off the retainer nut a few turns and sit the tube between a couple of blocks suppo; /archives//html/Amps/2010-09/msg00041.html (9,753 bytes)

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