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1. Re: [Amps] HV rectifier strings - to bypass or not? (score: 1): Author: Shane Youhouse <kd6vxi@gmail.com>; Date: Tue, 2 Nov 2010 13:52:43 -0800; Computers have mad filtering due to errors. Bad power line noise in early mainframe and similar computers caused data errors. When dealing with mission critical systems (and everyone believes theirs; /archives//html/Amps/2010-11/msg00015.html (11,341 bytes)
2. Re: [Amps] QRO is alive and well..in Greece (score: 1): Author: Shane Youhouse <kd6vxi@gmail.com>; Date: Mon, 15 Nov 2010 10:11:46 -0800; Jim, The mod on the MFJ is a well documented mod. IIRC, it involves an inductor. http://www.we0h.us/Amateur_Radio_stuff/MFJ/MFJ-259B/LF-MF-Mods/ is what I have stored in my bookmarks for the mod. I h; /archives//html/Amps/2010-11/msg00251.html (9,169 bytes)
3. Re: [Amps] source of '3rd harmonic' (score: 1): Author: Shane Youhouse <kd6vxi@gmail.com>; Date: Sat, 20 Nov 2010 18:53:42 -0800; I'd try putting a single steering diode from the CT junction of the input transformer to the bias network. Just ensures safety. Are you SURE that you have good bias? Your bias is a LOW impedance sour; /archives//html/Amps/2010-11/msg00372.html (11,333 bytes)
4. Re: [Amps] 1800 Watt Henry 2K4? (score: 1): Author: Shane Youhouse <kd6vxi@gmail.com>; Date: Sun, 21 Nov 2010 20:12:36 -0800; That's 100 watts of AM carrier drive. And Pout measured in PEP. --Shane KD6VXI _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailma; /archives//html/Amps/2010-11/msg00377.html (7,363 bytes)
5. Re: [Amps] brass or BNP hardware (score: 1): Author: "Shane Youhouse" <kd6vxi@gmail.com>; Date: Tue, 23 Nov 2010 08:13:43 -0800; 3 x 3cx800s will do a LOT of Pout. Command's does near 6 Kw. The 3CX800 has a pair of datasheets running around. One shows Pout > 1200 watts, another shows it at 750. 3 800s doing 4Kw is only 1300 wa; /archives//html/Amps/2010-11/msg00392.html (8,781 bytes)
6. [Amps] You can't make these up... (score: 1): Author: "Shane Youhouse" <kd6vxi@gmail.com>; Date: Sat, 27 Nov 2010 10:06:56 -0800; For those of you doing mock-ups, I guess... Or someone that wants a good LOOKING amplifier, if not functionally working. I'm almost willing to bet it costs more to ship than the final selling price..; /archives//html/Amps/2010-11/msg00515.html (8,301 bytes)
7. Re: [Amps] [Bulk] Help identifying tubes (score: 1): Author: "Shane Youhouse" <kd6vxi@gmail.com>; Date: Mon, 29 Nov 2010 08:01:03 -0800; The Westinghouse, as someone else pointed out, is a 5-500. Not the most common tube.... I'd compare bases and what's connected to what, and see if they really are the same, or you have a 5-500 and a; /archives//html/Amps/2010-11/msg00541.html (10,269 bytes)
8. Re: [Amps] 572B AMP PLANS (score: 1): Author: "Shane Youhouse" <kd6vxi@gmail.com>; Date: Sun, 26 Dec 2010 17:31:03 -0800; In my experience, the 572 is a superb tube for keydown modes.... IF YOU OPERATE IT AS AN 811A!!!!! IE, about 20 watts carrier each. --Shane KD6VXI -- It's a sad state of affairs when your tubes don't; /archives//html/Amps/2010-12/msg00385.html (13,222 bytes)
9. Re: [Amps] Tuner Loss (score: 1): Author: "Shane Youhouse" <kd6vxi@gmail.com>; Date: Fri, 11 Mar 2011 07:47:34 -0800; It seems to me that the losses in a tuner typically will be effected by the transformation ratio. There is loss in any network that transforms impedance that I've been able to find. Circulating curre; /archives//html/Amps/2011-03/msg00088.html (11,291 bytes)
10. Re: [Amps] Tuner Loss (score: 1): Author: "Shane Youhouse" <kd6vxi@gmail.com>; Date: Sun, 13 Mar 2011 09:57:07 -0700; ALSO: In reading up on 3-1000 and 4-1000 tubes, I noticed that one of them actually goes into the output network losses, and Eimac puts them about 10 percent..... IE, they say the PLATE output power; /archives//html/Amps/2011-03/msg00098.html (11,138 bytes)
11. Re: [Amps] VTX-X118 Tetrode mytery tube? (score: 1): Author: "Shane Youhouse" <kd6vxi@gmail.com>; Date: Mon, 04 Apr 2011 12:37:23 -0700; Rebranded 4CX1500. --Shane KD6VXI -- It's a sad state of affairs when your tubes don't have handles but your dummy load does. _______________________________________________ Amps mailing list Amps@co; /archives//html/Amps/2011-04/msg00124.html (9,898 bytes)
12. Re: [Amps] 4 wire 240VAC service? What to do now? (score: 1): Author: "Shane Youhouse" <kd6vxi@gmail.com>; Date: Mon, 04 Apr 2011 12:41:31 -0700; The absolute safest method, using old tech 3 wire amplifiers if you have a 4 wire cord is to install a GFCI on each leg of the 220. Use it to plug in a wall wart or reading lamp, keep it balanced. If; /archives//html/Amps/2011-04/msg00126.html (9,905 bytes)
13. Re: [Amps] Alpha vs Henry (score: 1): Author: "Shane Youhouse" <kd6vxi@gmail.com>; Date: Tue, 05 Apr 2011 09:08:34 -0700; My main amp at the ham shack is a 1kw continuous, all mode. NO time limit. It's commonly pushed to 1.5 kw on the amateur bands by people smarter than me.... It's also got a 3.5 KVA choke input power; /archives//html/Amps/2011-04/msg00174.html (11,843 bytes)
14. Re: [Amps] Alpha vs Henry (score: 1): Author: "Shane Youhouse" <kd6vxi@gmail.com>; Date: Wed, 06 Apr 2011 21:07:50 -0700; I was thinking somewhere in the neighborhood of 750 watts. The AL-1500 would run approximately 400 watts AM, comfortably, roundtable style, last time I saw one. Keep in mind, this is 2-5 minutes on,; /archives//html/Amps/2011-04/msg00272.html (13,577 bytes)
15. [Amps] Odd SB220 behavior (score: 1): Author: "Shane Youhouse" <kd6vxi@gmail.com>; Date: Fri, 08 Apr 2011 09:12:25 -0700; Tuned up the SB220 last night (Hasn't been inline for a week or so). Everything as normal. Flip grid current meter to grid, key the exciter, PINNED (Guess I'm doing back to back diodes today :) ) Unk; /archives//html/Amps/2011-04/msg00300.html (7,295 bytes)
16. Re: [Amps] Airflow meter (score: 1): Author: "Shane Youhouse" <kd6vxi@gmail.com>; Date: Wed, 13 Apr 2011 09:34:50 -0700; I never thought of using one of those, but great idea. I've got two, my son has asthma and one of them was questionable... Guess I found a use for it :) You can usually source them locally for 10-30; /archives//html/Amps/2011-04/msg00371.html (14,118 bytes)
17. Re: [Amps] What's with RF Parts? (score: 1): Author: "Shane Youhouse" <kd6vxi@gmail.com>; Date: Thu, 14 Apr 2011 08:03:02 -0700; I do know that sometimes during Dayton and other 'shows', RF Parts does have heavy delays at times. Never had where it just went to the nether, though.. Try getting ahold of Merrit.. That's the highe; /archives//html/Amps/2011-04/msg00414.html (8,077 bytes)
18. Re: [Amps] wirewound resistor inductance/capacitance parameters (score: 1): Author: Shane Youhouse <kd6vxi@gmail.com>; Date: Mon, 18 Apr 2011 11:29:28 -0700; I just checked a Dale old school 'sand' wirewound, swept from 1.79 to 4.33. 100 ohms, 3 watts. R ranged from 100 to 102. X from 12 to 13. Swr was 2.1 to 2.0, all readings from lo to high vs freq. Nex; /archives//html/Amps/2011-04/msg00475.html (11,388 bytes)
19. Re: [Amps] wirewound resistor inductance/capacitance parameters (score: 1): Author: Shane Youhouse <kd6vxi@gmail.com>; Date: Mon, 18 Apr 2011 11:18:04 -0700; Dunno about that, Carl, the Halides and Sodiums have an arc tube in them that, IIRC, is designed to fire at app 600 volts. It's not just a piece of wire in them.. I HAVE seen 250 and 300 watt incande; /archives//html/Amps/2011-04/msg00476.html (11,996 bytes)
20. Re: [Amps] DIN vs N (score: 1): Author: Shane Youhouse <kd6vxi@gmail.com>; Date: Mon, 25 Apr 2011 16:24:52 -0700; PL 259s I've personally witness run at 2Kw carrier, 10 Kw pep. N's AND BNC's I've seen about 5-6 kw carrier, 100 percent modulated. LC I've seen go to about 55Kw, modulated. I've seen the DIN go in t; /archives//html/Amps/2011-04/msg00528.html (12,205 bytes)

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