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Total 10 documents matching your query.

1. [Amps] adding second tube to AL1200 (score: 1): Author: "Kevin Adam" <n9iww@verizon.net>; Date: Wed, 17 May 2006 15:52:40 -0400; Wanted information on adding a second tube to AL 1200 has anyone done this if so can you give the details as to what all is envoled what parts you had to change if any please help Reply to N9iww At V; /archives//html/Amps/2006-05/msg00201.html (6,639 bytes)
2. Re: [Amps] adding second tube to AL1200 (score: 1): Author: Vic K2VCO <vic@rakefet.com>; Date: Wed, 17 May 2006 13:22:21 -0700; Off the top of my head, you would probably need an outboard power supply, since it's doubtful that a larger transformer would fit. Then you'd need to change the input network components for half the; /archives//html/Amps/2006-05/msg00202.html (7,891 bytes)
3. Re: [Amps] adding second tube to AL1200 (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Wed, 17 May 2006 15:57:15 -0500; A 2:1 unun transformer will work fine here; just like the ones Alpha supplied with their 77DX to SX conversion kit. That is an understatement! Under-sized wire compounded by small winding diameter.; /archives//html/Amps/2006-05/msg00204.html (7,850 bytes)
4. Re: [Amps] adding second tube to AL1200 (score: 1): Author: Gudguyham@aol.com; Date: Wed, 17 May 2006 18:24:39 EDT; Off the top of my head, you would probably need an outboard power supply, since it's doubtful that a larger transformer would fit. Then you'd need to change the input network components for half the; /archives//html/Amps/2006-05/msg00210.html (7,783 bytes)
5. Re: [Amps] adding second tube to AL1200 (score: 1): Author: "Bob Maser" <bmaser@tampabay.rr.com>; Date: Wed, 17 May 2006 20:07:54 -0400; All of this proves my point about Ameritron amps. They make the Heathkit amps of yesteryear seems Collinsesque. When are you newcomer hams going to learn that anything that comes from MFJ is junk. I'; /archives//html/Amps/2006-05/msg00213.html (9,501 bytes)
6. Re: [Amps] adding second tube to AL1200 (score: 1): Author: "Keith Dutson" <kdutson@sbcglobal.net>; Date: Wed, 17 May 2006 19:46:43 -0500; Hence the moniker "Mighty Fine Junk." :) In reality, there are several very good products offered by Mr. Jue. You just have to know how to pick them out of the junk pile. One hint is to discover the; /archives//html/Amps/2006-05/msg00215.html (10,198 bytes)
7. Re: [Amps] adding second tube to AL1200 (score: 1): Author: gdaught6@stanford.edu; Date: Wed, 17 May 2006 17:55:38 -0700; No need for all of this vitriol. The point is, putting a second tube in almost ANY amplifier, from ANY manufacturer, is not likely to be a good idea. That goes for Collins, Alpha, or whoever is our f; /archives//html/Amps/2006-05/msg00217.html (8,351 bytes)
8. Re: [Amps] adding second tube to AL1200 (score: 1): Author: R L Measures <r@somis.org>; Date: Wed, 17 May 2006 19:41:29 -0700; Kevin -- The stock tank inductances >40m in the Al-1200 are not adequate for one 3cx1200A7, much less two. Doubling the diameter of all tank L conductors, and halving their uH would be a good place t; /archives//html/Amps/2006-05/msg00220.html (8,860 bytes)
9. Re: [Amps] adding second tube to AL1200 (score: 1): Author: R L Measures <r@somis.org>; Date: Wed, 17 May 2006 20:29:42 -0700; The funniest thing I ever heard about MFJ-Ameritron amplifiers was from the "expert" who designed them, who told me that they don't have a glitch resistor because the filter caps Ameritron buys have; /archives//html/Amps/2006-05/msg00223.html (10,460 bytes)
10. Re: [Amps] adding second tube to AL1200 (score: 1): Author: Tony King - W4ZT <amps080605@w4zt.com>; Date: Thu, 18 May 2006 00:17:45 -0400; Thanks Rich! That point is valid for adding a second tube to almost any amp whether it is home brew or commercial. Adding a second tube is never as simple as it sounds. As pointed out by others, most; /archives//html/Amps/2006-05/msg00224.html (10,546 bytes)

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