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1. [AMPS] Alpha 78 Input matching unit (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Wed, 4 Mar 1998 15:12:28 -0800 (PST); Hi Dick! According to Ray Heaton -- three feet max! '73 Dave N7UE David B. Ritchie, Esq. D'Alessandro & Ritchie, P.C. Intellectual Property Lawyers 1731 Technology Drive, Suite 700, San Jose, CA 9511; /archives//html/Amps/1998-03/msg00054.html (10,615 bytes)
2. [AMPS] HF Mobile Amps (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Thu, 12 Mar 1998 01:58:51 -0800 (PST); You might consider TenTec and SGC -- they both make models at about 500W output level -- also Metron (?) I believe makes or made a similar device. I believe the TenTec model is the Hercules II (someo; /archives//html/Amps/1998-03/msg00201.html (8,763 bytes)
3. [AMPS] Alpha 374A kaput (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Mon, 12 Jan 1998 13:13:59 -0800 (PST); There are three ceramic resistors to worry about and they can all test good when cold -- the problem is that when they heat up, they open up. The first is the 10k -- that shouldn't burn the fuses --; /archives//html/Amps/1998-01/msg00037.html (8,770 bytes)
4. [AMPS] Alpha 374 and 12 meters (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Wed, 28 Jan 1998 18:06:32 -0800 (PST); I'm pretty sure the parts are identical Dave N7UE David B. Ritchie, Esq. D'Alessandro & Ritchie, P.C. Intellectual Property Lawyers 1731 Technology Drive, Suite 700, San Jose, CA 95110-1312 408-441-1; /archives//html/Amps/1998-01/msg00114.html (7,892 bytes)
5. [AMPS] Alpha 76 Parts (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Wed, 12 Nov 1997 08:34:17 -0800 (PST); Try AlphaPower -- they are supposed to have parts and be able to repair -- Unless you like self torture, I'd let them do the bandswitch repair. Dave N7UE David B. Ritchie, Esq. D'Alessandro & Ritchie; /archives//html/Amps/1997-11/msg00184.html (8,268 bytes)
6. [AMPS] Need info on Alpha 78 (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Fri, 21 Nov 1997 13:07:39 -0800 (PST); There is a connector strip on the power supply side of the amp mounted to the divider going from the front to the back of the amp. If one tap is shorted, you are in 220 mode, if three are, you are in; /archives//html/Amps/1997-11/msg00312.html (8,421 bytes)
7. [AMPS] CENTURION HELP (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Wed, 27 Aug 1997 21:24:10 -0700 (PDT); I've never seen a Centurion, but if they are anything like ALPHAs, they may have a resistor in a step start configuration -- if this resistor is popped (usually a big 10W+ ceramic job) it can and has; /archives//html/Amps/1997-08/msg00218.html (11,439 bytes)
8. [AMPS] Heat Paint (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Thu, 12 Jun 1997 21:06:53 -0700 (PDT); I called them the other day at the posted number, asked them to send me the catalog, they promised to get it to me in two weeks. Maybe they lied. Dave N7UE -- FAQ on WWW: http://www.contesting.com/am; /archives//html/Amps/1997-06/msg00207.html (9,758 bytes)
9. [AMPS] Alpha 78 (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Sun, 4 May 1997 11:33:44 -0700 (PDT); Its a great amp; the tubes are 8874s (the aircooled version of the 8873/4/5 series); the resistor array mounted below the tube deck is a padding arrangement to allow 100+ watt transceivers like Colli; /archives//html/Amps/1997-05/msg00013.html (9,095 bytes)
10. [AMPS] Alpha 77 problem (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Mon, 31 Mar 1997 21:30:22 -0800 (PST); I'm not totally familiar with the 77, but I think it has a step-start sequence like the smaller 7x amps -- if so, a resistor in each leg of the 220 input appears for a while and then gets shorted aft; /archives//html/Amps/1997-04/msg00000.html (8,006 bytes)
11. [AMPS] to choke or not to choke... (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Tue, 1 Apr 1997 18:39:28 -0800 (PST); Its pretty easy to wire around a fried choke on a Henry, just use the cap, and get the amp back on the air (use the low vlotage setting if you do that!) They are pretty heavy I don't see any real or; /archives//html/Amps/1997-04/msg00025.html (9,658 bytes)
12. [AMPS] FET Power Amps -Reply (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Tue, 1 Apr 1997 18:45:44 -0800 (PST); That's what I meant when I referred to the Ameritrons -- but I hadn't heard any feedback on them -- it sounds like you like yours...does it work on all bands? How much does it weigh? What do you do f; /archives//html/Amps/1997-04/msg00026.html (12,272 bytes)
13. [AMPS] SB-220 IMPROVEMENTS (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Tue, 1 Apr 1997 18:50:25 -0800 (PST); 3db is barely detectable by the human ear 1-2 db can be measured by expensive instruments 2db hardly seems useful on any band (of course, the first 160db may be VERY useful) Dave N7UE David B. Ritchi; /archives//html/Amps/1997-04/msg00027.html (9,542 bytes)
14. [AMPS] SB-220 IMPROVEMENTS (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Tue, 1 Apr 1997 19:03:16 -0800 (PST); I still can't stop laughing! You better make sure that you can live with (die with?) the phoenics that people will come up with! Dave N7UE (I hate to think!) David B. Ritchie, Esq. D'Alessandro & Rit; /archives//html/Amps/1997-04/msg00028.html (10,314 bytes)
15. [AMPS] SB-220 IMPROVEMENTS (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Tue, 1 Apr 1997 19:03:58 -0800 (PST); Details??? It sounds juicy Dave N7UE David B. Ritchie, Esq. D'Alessandro & Ritchie, P.C. -- Intellectual Property Lawyers 3521 E. Yorkshire Road, Pasadena, CA 91107-5432 818-683-8800 (TEL) 818-683-89; /archives//html/Amps/1997-04/msg00029.html (9,383 bytes)
16. [AMPS] SB-220 IMPROVEMENTS (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Tue, 1 Apr 1997 23:50:49 -0800 (PST); Whatever you say -- but when you are at a noise floor (like the moonbounce example) -- I find it hard to believe that 1db will do you much good -- what does that make your S/N ratio at that point? An; /archives//html/Amps/1997-04/msg00038.html (10,439 bytes)
17. [AMPS] Re: Hawaiin Humidity (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Tue, 1 Apr 1997 23:58:37 -0800 (PST); A thought-- My parents have a piano at the beach They leave a small wattage light bulb going inside it when they are away It helps Perhaps with a Henry if you left a light bulb going if you'll not be; /archives//html/Amps/1997-04/msg00040.html (8,615 bytes)
18. [AMPS] more db's (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Wed, 2 Apr 1997 00:05:01 -0800 (PST); Dear Hakan: Lets keep it nice Thank you for your view. Dave N7UE David B. Ritchie, Esq. D'Alessandro & Ritchie, P.C. -- Intellectual Property Lawyers 3521 E. Yorkshire Road, Pasadena, CA 91107-5432 8; /archives//html/Amps/1997-04/msg00041.html (8,859 bytes)
19. [AMPS] SB-220 IMPROVEMENTS (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Wed, 2 Apr 1997 09:03:02 -0800 (PST); OK I wouldn't say I am a casual user, but on the other hand, I've never gone to a lot of trouble to actually measure the signal strengths -- I consider the S-meter pretty useless for measuring these; /archives//html/Amps/1997-04/msg00045.html (13,572 bytes)
20. [AMPS] Trailer mounted tower (score: 1): Author: dbr@alumni.caltech.edu (David B. Ritchie); Date: Fri, 4 Apr 1997 19:54:04 -0800 (PST); I bought it. Dave N7UE David B. Ritchie, Esq. D'Alessandro & Ritchie, P.C. -- Intellectual Property Lawyers 3521 E. Yorkshire Road, Pasadena, CA 91107-5432 818-683-8800 (TEL) 818-683-8900 (FAX) dbr@a; /archives//html/Amps/1997-04/msg00120.html (7,439 bytes)

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