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301. [Amps] Fwd: Re: amp reading (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Sat, 24 Jan 2015 15:33:10 +0800
Probably quite true Carl. I use a huge auto transformer here, with taps at minus 10 through to minus 40 volts. The AL-1500 is permanently running at 230V AC with the taps inside the amp set at 240V.
/archives//html/Amps/2015-01/msg00232.html (8,991 bytes)

302. Re: [Amps] GU84b tubes (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Fri, 30 Jan 2015 11:46:37 +0800
Yep. Dr Alex is a great guy to buy from as well. Prices and service are the best. 73, Alek VK6APK 30 seconds with Google gives www.urrll.net 73, ... Joe, W4TV On 2015-01-29 9:12 PM, Jim W7RY wrote: B
/archives//html/Amps/2015-01/msg00375.html (9,198 bytes)

303. Re: [Amps] GU84b tubes (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Sat, 31 Jan 2015 12:18:28 +0800
http://www.ur4ll.net/ --Original Message-- From: Behiels jean-Pierre Sent: Thursday, January 29, 2015 7:33 AM To: amps@contesting.com Subject: [Amps] GU84b tubes They are for sale at : www.ur4ll.com
/archives//html/Amps/2015-01/msg00381.html (8,477 bytes)

304. Re: [Amps] Need Zener for 2KD-3 (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Tue, 03 Feb 2015 07:09:44 +0800
Yeah. Get a string of 1N5408s or 6A10s to make up the 5.6V you want and stick them into the place where your 1N4561 was, except turn them around so that the string is forward biassed. Then stick a fe
/archives//html/Amps/2015-02/msg00010.html (8,122 bytes)

305. Re: [Amps] Variac Question (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Tue, 03 Feb 2015 08:38:10 +0800
No you don't need a centre tapped primary. Read it again and draw it on a piece of paper. Alek VK6APK On 3/02/2015 8:13 AM, Larry wrote: Mike, If I understand correctly, to do what you are suggesting
/archives//html/Amps/2015-02/msg00013.html (11,587 bytes)

306. Re: [Amps] I'm not kidding: TL922 (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Wed, 04 Feb 2015 15:41:07 +0800
1. Get a child to listen for it. They have better hearing that we do. 2. Record it with a mic into your pc and with the appropriate software, play it back and look at the displayed spectrum. 3. Put e
/archives//html/Amps/2015-02/msg00041.html (8,340 bytes)

307. Re: [Amps] Amps Digest, Vol 146, Issue 13 (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Sun, 08 Feb 2015 12:19:24 +0800
Message: 3 When I was a kid, a local department store had some kind of ultrasonic alarm system that drove me nuts. I used to also be able to hear the 15 kHz sound from TV sweep oscillators. One of t
/archives//html/Amps/2015-02/msg00088.html (7,805 bytes)

308. Re: [Amps] GS35B Gassy, or Arcing? (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Thu, 26 Feb 2015 06:04:00 +0800
The GS35B is a indirectly heated tube. That means, you can run the tube with just the heater and blower running to getter it. Do it for 2 to 3 days and then re-test with the hipot. Would be interesti
/archives//html/Amps/2015-02/msg00145.html (9,222 bytes)

309. Re: [Amps] GS35B Gassy, or Arcing? (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Fri, 27 Feb 2015 09:33:11 +0800
Yeah and write to Dr Alex and buy another GS35B. They are cheap as chips and you might get a better one. 73, Alek VK6APK Carl KM1H I went back and read more of that page after I got more fully awake.
/archives//html/Amps/2015-02/msg00159.html (12,247 bytes)

310. Re: [Amps] Yaesu FL2000B amp and input tuning problems (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Mon, 06 Apr 2015 09:59:26 +0800
G'day Morris. The method you described is probably more appropriate for setting the output pi circuit settings. I don't think you can use that method for the input. I would have thought that you woul
/archives//html/Amps/2015-04/msg00041.html (10,696 bytes)

311. Re: [Amps] Time for New Power Meter (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Tue, 21 Apr 2015 06:39:24 +0800
Huh? The LP-100A is hardly a basic Wattmeter. It is one of the fanciest bits of shack gear you are ever likely to come across. See http://www.telepostinc.com/ and click on LP-100A <http://www.telepos
/archives//html/Amps/2015-04/msg00142.html (9,411 bytes)

312. Re: [Amps] Time for New Power Meter (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Tue, 21 Apr 2015 07:22:07 +0800
Yep. We don't have many hams over this part of the world but I reckon we have the highest ratio of LP-100A per Ham, anywhere in the world. :-) I have 2 of them. Cheers. Alek. I haven't pulled the tri
/archives//html/Amps/2015-04/msg00145.html (11,007 bytes)

313. Re: [Amps] Time for New Power Meter (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Mon, 04 May 2015 08:09:47 +0800
Might I be allowed to suggest that Accuracy +/- 5% of Full Scale Power" means that the best accuracy they guarantee is that 5% at full scale. At lower readings, it may still be 5% or it might be a li
/archives//html/Amps/2015-05/msg00034.html (12,428 bytes)

314. Re: [Amps] Time for New Power Meter (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Fri, 08 May 2015 07:11:58 +0800
Yep. It is a fact. All computers are female. 1. They do what you say, rather than what you mean. 2. They are always right. 3. They love to tell you when you are wrong. 73, Alek VK6APK On 8/05/2015 3:
/archives//html/Amps/2015-05/msg00101.html (10,135 bytes)

315. Re: [Amps] Date Code Samsung 120 MFD 450 Volt Capacitors? (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Tue, 12 May 2015 07:02:37 +0800
You worry too much. Just put'em in, turn'em on and wait. You'll soon know for sure, if they are any good. In other words, 95% of the population would simply use them without a second thought. I'm wit
/archives//html/Amps/2015-05/msg00109.html (9,835 bytes)

316. Re: [Amps] Looking for a 68pF 7KV HEC doorknob (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Fri, 22 May 2015 19:42:27 +0800
G'day Gary. I went on ebay and found some 22pF units and used 3 of them in parallel between two plates and inserted them into the spot where the sigle cap was in the antenna. It works extremely well.
/archives//html/Amps/2015-05/msg00140.html (9,705 bytes)

317. Re: [Amps] 12V IM3 (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Sat, 23 May 2015 06:46:10 +0800
You all live in areas of high ham population. Come to Western Australia where its hard enough hearing the the primary signals. You never hear any IMD products. The bands are clean and uncrowded here.
/archives//html/Amps/2015-05/msg00163.html (8,775 bytes)

318. Re: [Amps] Yaesu Orange Button (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Mon, 25 May 2015 06:51:25 +0800
On the FT-1000MP MKV, the button is not orange and power is internally limited to 75 Watts. However, as Charly said, you must NEVER use less than 75 Watts, as the MKV cooling system is p1ss poor and
/archives//html/Amps/2015-05/msg00189.html (9,243 bytes)

319. Re: [Amps] Yaesu Orange Button (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Mon, 25 May 2015 08:21:02 +0800
You were lucky Jim. My club was using my MKV in a contest, running around 15 Watts in the Class A position, to drive an amplifier. It lasted about 1 hour before the finals were cooked. 73, Alek. VK6A
/archives//html/Amps/2015-05/msg00191.html (11,058 bytes)

320. Re: [Amps] Re-imagining the 30S-1 (score: 1)
Author: Alek Petkovic <vk6apk@bigpond.com>
Date: Mon, 13 Jul 2015 15:33:53 +0800
I'm with Roger. Modern is simple and light weight. Do away with all that iron. Get the transformer rewound. A bunch of 6A10 diodes with a string of electrolytics and MOF resistors and the job is done
/archives//html/Amps/2015-07/msg00038.html (9,433 bytes)


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