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1. [AMPS] TL-922A 10m conversion (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Mon, 09 Nov 1998 06:04:38 -0500; I need the values for the Pi input caps on 15 and 10m. Thanks, Roger -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contes; /archives//html/Amps/1998-11/msg00123.html (6,834 bytes)
2. [AMPS] TL-922 input mods (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Thu, 12 Nov 1998 22:47:33 -0500; Thanks to all for the 10m conversion info. An examination of the input Pi networks indicate they have been designed with a Q of 1 except for 80m where it seems to be about .5! Has anyone tried increa; /archives//html/Amps/1998-11/msg00187.html (7,011 bytes)
3. [AMPS] connectors (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Tue, 20 Oct 1998 19:17:30 -0400; Isn't 7/16 DIN an oxymoron? 73, Roger -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@c; /archives//html/Amps/1998-10/msg00311.html (7,425 bytes)
4. [AMPS] Clipperton L & Bad tubes (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Wed, 30 Sep 1998 14:32:50 -0400; Check the filament voltage with an accurate meter. I repaired one for a friend that had almost 7 volts on the filaments. The poor 572B's went bad in a hurry! We put a 0.1 ohm resistor in the circuit; /archives//html/Amps/1998-09/msg00340.html (7,299 bytes)
5. [AMPS] ALC - an elementary question (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Fri, 14 Aug 1998 16:45:11 -0400; You've hit upon one of the major problems with ALC. Another is the time constant of the circuitry. It takes a couple of milliseconds for the ALC to reduce the drive level and during that time the amp; /archives//html/Amps/1998-08/msg00140.html (7,642 bytes)
6. [AMPS] Kenwood TS450 & SB-200?? (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Fri, 14 Aug 1998 20:01:41 -0400; Hi Tom... I know you addressed this to Rich but can't resist putting in my two cents worth. When I was planning to QSK my Drake L-7 amp for use with my TS-940, I used a scope with triggered sweep to; /archives//html/Amps/1998-08/msg00150.html (9,663 bytes)
7. [AMPS] Kenwood TS450 & SB-200?? (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Mon, 17 Aug 1998 15:33:11 -0400; A very good point, Gerard. I was able to find a waveform in my TS-940 that went positive upon key closure and stayed positive for 9ms after key up. It's the TR waveform for those interested. I use it; /archives//html/Amps/1998-08/msg00162.html (8,694 bytes)
8. [AMPS] SGC Power Cube (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Wed, 01 Jul 1998 16:14:44 -0400; I think I would be suspicious of any manufacturer that thinks that 500 watts is "nearly a kilowatt"! 73, Roger -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Ad; /archives//html/Amps/1998-07/msg00009.html (6,668 bytes)
9. [AMPS] Gassy Tubes and Gas Arcs (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Sat, 16 May 1998 22:33:12 +0100; Are you sure it's gas, Jon? I seem to remember that some tubes produce a blue flouresence on the inside of the envelope when bombarded by wayward ions. Many mistakenly assume the tube is gassy when t; /archives//html/Amps/1998-05/msg00295.html (8,009 bytes)
10. [AMPS] Gassy Tubes and Gas Arcs (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Sun, 17 May 1998 12:35:32 +0100; If it looks like it's on the inside of the envelope, it's ion bombardment. If it's inside the anode structure, then it's gas. In my early days, I replaced many tubes I thought were gassy! Good for RC; /archives//html/Amps/1998-05/msg00305.html (8,304 bytes)
11. [AMPS] electrolytic caps (score: 1): Author: n1rj@ime.net (Roger D. Johnson); Date: Sun, 22 Mar 1998 13:23:50 +0000; Looks like time to rebuild the old L-7 power supply. Where can one obtain high voltage axial lead electrolytic caps these days? Thanks, Roger -- FAQ on WWW: http://www.contesting.com/ampfaq.html Subm; /archives//html/Amps/1998-03/msg00357.html (7,049 bytes)

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