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41. Re: [Amps] QRO Parts (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Wed, 25 Nov 2009 05:16:33 +0800
Huh? I've never heard that about Dr Alex? 73, Alek VK6APK http://www.qrz.com/db/vk6apk http://www.qrz.com/db/vk6py _______________________________________________ Amps mailing list Amps@contesting.co
/archives//html/Amps/2009-11/msg00265.html (14,020 bytes)

42. Re: [Amps] Svetlana 4CX800 (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Wed, 09 Dec 2009 06:28:46 +0800
Dr Alex has them for $100 each and he is a very honest guy to deal with. http://www.nd2x.net/ur4ll.html While you are there, take a look at http://www.nd2x.net/base-1.html Lot's of nice amplifier por
/archives//html/Amps/2009-12/msg00236.html (9,065 bytes)

43. Re: [Amps] OM power power supply design (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Thu, 10 Dec 2009 06:28:25 +0800
It doesn't look to me, like the secondaries are in series. Each secondary has it's own rectifier and the dc outputs are in series. Is there some sort of path back through the full wave bridge rectifi
/archives//html/Amps/2009-12/msg00250.html (8,185 bytes)

44. Re: [Amps] N8GPQ GLA 1000 mod pages? (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Thu, 10 Dec 2009 06:32:02 +0800
Yep. I have it on my hard drive. I can send you the pdf and pictures direct if you like. 73, Alek. http://www.qrz.com/db/vk6apk http://www.qrz.com/db/vk6py ___________________________________________
/archives//html/Amps/2009-12/msg00251.html (7,318 bytes)

45. Re: [Amps] OM power power supply design (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Thu, 10 Dec 2009 07:10:37 +0800
Yep, sounds good Larry. Thanks for that. It's only 10 past 7 in the morning and I've learned something already. Gotta be happy with that. Cheers from sunny Perth, Alek. http://www.qrz.com/db/vk6apk h
/archives//html/Amps/2009-12/msg00253.html (10,846 bytes)

46. Re: [Amps] Clipperton L issues (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Tue, 15 Dec 2009 06:53:31 +0800
G'day Ken. Hope you changed your pants. I just looked through my manual for the Clipperton L and it makes no mention that you shouldn't do what you just did. It has a number of warnings but not that
/archives//html/Amps/2009-12/msg00331.html (11,646 bytes)

47. Re: [Amps] Alternative cooling strategies for SB-220? (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Wed, 16 Dec 2009 17:46:49 +0800
Go back to the original fan which was nice and quiet . . . . but be warned, the xyl will sound a lot louder if the fan is quieter. 73, Alek VK6APK http://www.qrz.com/db/vk6apk http://www.qrz.com/db/v
/archives//html/Amps/2009-12/msg00369.html (9,256 bytes)

48. Re: [Amps] What is Svetlana 4CX1600B Worth? (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Sat, 02 Jan 2010 08:43:31 +0800
G'day Jeff. I would be happy to take one off your hands for $500 plus shipping. I could pay with Paypal or Western Union. 73, Alek VK6APK From sunny Binningup, Western Australia http://www.qrz.com/db
/archives//html/Amps/2010-01/msg00005.html (8,268 bytes)

49. Re: [Amps] What is Svetlana 4CX1600B Worth? (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Sat, 02 Jan 2010 09:57:40 +0800
Thanks Jeff. Don't think I'll worry about them if they go on Ebay. Can't be bothered with auctions. If I see something I want and the price is what I'm prepared to pay, then I'll buy it there and the
/archives//html/Amps/2010-01/msg00008.html (11,920 bytes)

50. Re: [Amps] Amps for sale...maybe (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Sun, 17 Jan 2010 16:14:23 +0800
Had my Emtron DX2 (4cx1600 version) for 10 years now. Puts out full power and has never, ever, given a moment's trouble. At the time I bought the amp, it was the flagship of the range. Last time I sp
/archives//html/Amps/2010-01/msg00232.html (11,124 bytes)

51. Re: [Amps] condition 4-1000A tubes? (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Sun, 24 Jan 2010 06:21:56 +0800
And you conditioned your tube the correct way. I was under the impression that the ONLY way to getter that type of tube is to get the anode hot. Think I've read that here a number of times. Simply ru
/archives//html/Amps/2010-01/msg00294.html (11,246 bytes)

52. Re: [Amps] HELP Modifications for a Kenwood TL922 (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Thu, 28 Jan 2010 06:52:02 +0800
Download the manuals of the AL80B and the AL82 from the Ameritron site and compare the input and output circuit values and/or part numbers. There may be some clues there. Apart from that, it seems to
/archives//html/Amps/2010-01/msg00390.html (10,907 bytes)

53. Re: [Amps] 811H Plate Current (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Thu, 28 Jan 2010 12:45:29 +0800
Set the switch to operate and short the RCA keying jack to check if the relays click. I had a 811H on the bench to repair and the relay contacts were fused which meant that the amp was keyed as yours
/archives//html/Amps/2010-01/msg00392.html (8,741 bytes)

54. Re: [Amps] More on the 811H (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Thu, 28 Jan 2010 15:10:46 +0800
Pull the tube and see if the symptoms disappear. Just as an aside. When the amp is run on 245V AC, here in Australia, the voltage measured on the filament pins, with all 4 tubes lit up, is 7.15V AC.
/archives//html/Amps/2010-01/msg00394.html (8,217 bytes)

55. Re: [Amps] Ameritron (et. al.) filament voltages (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Fri, 29 Jan 2010 06:05:43 +0800
G'day Rob It is not any "camp" that makes the claim of shortened emissive life due to high filament voltage. It is Eimac, in its "Care And Feeding" book. For every 3% increased in filament voltage, t
/archives//html/Amps/2010-01/msg00403.html (10,491 bytes)

56. Re: [Amps] Ameritron (et. al.) filament voltages (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Fri, 29 Jan 2010 14:01:39 +0800
Very true Roger. That is a real problem and it makes it hard to make sure you don't go too far the other way. I do my calcs when the line votage is high and set the filament volts 2-3% higher than no
/archives//html/Amps/2010-01/msg00414.html (10,858 bytes)

57. Re: [Amps] Ameritron (et. al.) filament voltages (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Fri, 29 Jan 2010 20:10:44 +0800
That may be true but it is hard to come up with any argument to say that it is not beneficial to run the filament at the nominal voltage, rather than some higher value chosen by an amplifier manufact
/archives//html/Amps/2010-01/msg00419.html (11,777 bytes)

58. Re: [Amps] Fw: Good amp to buy /amp notes (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Sat, 30 Jan 2010 17:15:07 +0800
G'day Jim What sorta anode volts did you run to get those output figures? I have a known good 3CX3000A7 pull here as well as the filament tranny and perhaps one day. . . . . . 73, Alek. http://www.qr
/archives//html/Amps/2010-01/msg00484.html (8,030 bytes)

59. Re: [Amps] Fw: Good amp to buy /amp notes (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Sat, 30 Jan 2010 18:00:54 +0800
Thanks Jim. That means 6kV should see it singing merrily. 73, Alek VK6APK http://www.qrz.com/db/vk6apk http://www.qrz.com/db/vk6py _______________________________________________ Amps mailing list Am
/archives//html/Amps/2010-01/msg00486.html (8,797 bytes)

60. Re: [Amps] Fw: Good amp to buy /amp notes (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Sat, 30 Jan 2010 19:45:52 +0800
Nor does SSB. That's why it is good to pulse tune. Its as close as you're gonna get. 73, Alek http://www.qrz.com/db/vk6apk http://www.qrz.com/db/vk6py _______________________________________________
/archives//html/Amps/2010-01/msg00489.html (8,846 bytes)

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