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21. Re: [Amps] 4CX1600U - too good to be true? (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Thu, 27 Aug 2009 06:52:41 +0800; Yeah and don't pay $179.00 on e bull. They are only $140.00 if you follow the link to UR4LL, Dr Alex. He is one of the best people to deal with. Prompt, honest and friendly. 73, Alek VK6APK http://ww; /archives//html/Amps/2009-08/msg00517.html (10,169 bytes)
22. Re: [Amps] 3-500z Silly question (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Fri, 04 Sep 2009 14:44:59 +0800; According to Eimac, running the filament at 6V AC, which is 20% higher than nominal voltage, will result in tube life which is just 1.3% of the life expectancy you could expect at 5V AC. In other wor; /archives//html/Amps/2009-09/msg00039.html (10,674 bytes)
23. Re: [Amps] LK500-ZB (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Thu, 10 Sep 2009 06:14:54 +0800; Yep, I've done it and it cleared the fault ok. Only problem is that I am now too chicken to test the tube in the amp. 73, Alek. VK6APK http://www.qrz.com/vk6apk http://www.qrz.com/vk6py _____________; /archives//html/Amps/2009-09/msg00133.html (9,521 bytes)
24. Re: [Amps] 3-500Z heater voltage reduction (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Wed, 16 Sep 2009 06:50:38 +0800; No, you want to drop it by 2 Volts. With 1 Volt, you are still 10% high. That's way too much! To destroy 2 Volts at 15 Amps so you need a resistance of 0.133 Ohms in series with the filaments. The re; /archives//html/Amps/2009-09/msg00215.html (9,703 bytes)
25. Re: [Amps] 3-500Z heater voltage reduction (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Wed, 16 Sep 2009 07:54:06 +0800; Yeah, you are right about the 30A for 2 tubes but this fellow mentioned that he measured 12V across the filaments so I assumed he was running them in series which gets us back to the 15A value. 73, A; /archives//html/Amps/2009-09/msg00219.html (12,021 bytes)
26. Re: [Amps] 3-500Z heater voltage reduction (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Wed, 16 Sep 2009 12:08:17 +0800; Yep, the resistor in the primary is the ideal way to go. I have a fixed value 22 Ohm resistor in my 3-500 amp and as Phil says, it doubles as a soft start. Alek, VK6APK PS: Mike, I just looked you up; /archives//html/Amps/2009-09/msg00223.html (9,590 bytes)
27. Re: [Amps] Kenwood TL-922A on 17 meters (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Fri, 25 Sep 2009 07:31:15 +0800; FWIW, I use the 20m position on my homebrew 3-500 amp. It works better on that tap than on the 15m tap. That is not to say that your's will be the same. Try it out on both positions with low drive an; /archives//html/Amps/2009-09/msg00282.html (8,540 bytes)
28. Re: [Amps] PEP Reading Wattmeter (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Fri, 02 Oct 2009 07:37:08 +0800; LP-100A. There is no other! http://www.telpostinc.com 73, Alek VK6APK E-mail message checked by Spyware Doctor (6.1.0.447) Database version: 6.13390 http://www.pctools.com/en/spyware-doctor-antivirus; /archives//html/Amps/2009-10/msg00003.html (8,969 bytes)
29. Re: [Amps] PEP Reading Wattmeter (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Fri, 02 Oct 2009 07:44:19 +0800; Thanks. Big fingers, small brain at this end. Cheers, Alek. E-mail message checked by Spyware Doctor (6.1.0.447) Database version: 6.13390 http://www.pctools.com/en/spyware-doctor-antivirus/ ________; /archives//html/Amps/2009-10/msg00008.html (11,002 bytes)
30. Re: [Amps] Eimac tube on the 'bay (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Mon, 12 Oct 2009 17:45:12 +0800; I have a good tested one (8295A) here out of VK6JX's TMC amp. It comes complete with SK184A socket and chimney. It was doing 1.5kW out when last fired up. We are doing a GS35b conversion and so the t; /archives//html/Amps/2009-10/msg00180.html (12,266 bytes)
31. Re: [Amps] Eimac tube on the 'bay (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Tue, 13 Oct 2009 07:26:50 +0800; No, the amp deck we are modifying is the driver amp or IPA from the 10kW Technical Materiel Corporation, 10kW transmitters. The same units can be seen in photos of the WWV site. We have,what used to; /archives//html/Amps/2009-10/msg00185.html (16,617 bytes)
32. Re: [Amps] Eimac tube on the 'bay (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Tue, 13 Oct 2009 17:38:32 +0800; Yeah, those decks are well built. Good luck with the transplant and the 156. 73, Alek VK6APK http://www.qrz.com/db/vk6apk http://www.qrz.com/db/vk6py _______________________________________________ A; /archives//html/Amps/2009-10/msg00191.html (11,842 bytes)
33. Re: [Amps] Eimac tube on the 'bay (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Tue, 13 Oct 2009 17:51:25 +0800; Yeah, we've got a very hefty 3 phase supply to give us 6kV DC. Actually, I have a question regarding our transformer. Being 3 phase, it has 3 windings of 4200V AC and the nameplate says that they are; /archives//html/Amps/2009-10/msg00192.html (20,375 bytes)
34. Re: [Amps] Eimac tube on the 'bay (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Wed, 14 Oct 2009 05:40:10 +0800; Thanks Peter It means that we have an adequate supply. We are using the rectifier assembly which came from the same transmitter as the transformer so everything will be connected in the same way. It; /archives//html/Amps/2009-10/msg00200.html (23,479 bytes)
35. Re: [Amps] Eimac tube on the 'bay (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Wed, 14 Oct 2009 05:47:07 +0800; Yes we have 60A per phase capacity at our club premises. Mains power is not a problem. Other than that, it is as you say. The power people don't like to run 3 phase into residential properties. The e; /archives//html/Amps/2009-10/msg00201.html (9,918 bytes)
36. Re: [Amps] Blower Restrictor QU? (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Fri, 16 Oct 2009 06:45:58 +0800; With the plate on, it would have been cavitating (correct name??) and therefore run a bit faster. The previous owner may have thought that this was a good thing and that a faster fan meant more air.; /archives//html/Amps/2009-10/msg00226.html (9,366 bytes)
37. Re: [Amps] TL-922 is buzzing (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Tue, 27 Oct 2009 08:01:53 +0900; If you are concerned about the tubes while you are testing, just take them out. As a bonus, there will be no load on the filament transformer and you will not have to de solder the wires to see if it; /archives//html/Amps/2009-10/msg00330.html (8,956 bytes)
38. Re: [Amps] Turns Counter (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Sun, 01 Nov 2009 08:26:56 +0800; Like this? http://cgi.ebay.com/Turns-Counter-for-Vacuum-Capacitors-Roller-Inductors_W0QQitemZ360166147403QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item53db93454b 73, Alek VK6APK From sunny Binningup; /archives//html/Amps/2009-10/msg00363.html (8,333 bytes)
39. Re: [Amps] Right Angle UHF Connector (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Mon, 23 Nov 2009 19:47:51 +0800; Ditto. Alek VK6APK http://www.qrz.com/db/vk6apk http://www.qrz.com/db/vk6py _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/l; /archives//html/Amps/2009-11/msg00238.html (7,787 bytes)
40. Re: [Amps] QRO Parts (score: 1): Author: Alek Petkovic <vk6apk@bigpond.com>; Date: Tue, 24 Nov 2009 13:52:55 +0800; No but I prefer to deal with Dr Alex, UR4LL. His prices are much better and if you have Skype, you can talk to him live on camera and he will show you your purchase as you are buying it. His service; /archives//html/Amps/2009-11/msg00249.html (7,888 bytes)

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