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1. [Amps] AL-80B questions (score: 1): Author: "" <dcoffman@iquest.net>; Date: Mon, 26 Jun 2006 11:44:48 -0400; Hello Gentlemen, I have a few questions about an Ameritron AL-80B amplifier that I converted for 50 MHz mono-band service. The first question goes to tuning the amplifier. I am using a Vacuum Variabl; /archives//html/Amps/2006-06/msg00442.html (8,810 bytes)
2. Re: [Amps] AL-80B questions (score: 1): Author: "" <dcoffman@iquest.net>; Date: Mon, 26 Jun 2006 17:05:11 -0400; Tom, I greatly appreciate you taking the time to answer my post. Excerpt: It's odd that you have a second setting. That probably indicates the tank is going into two modes, or perhaps that the amp ha; /archives//html/Amps/2006-06/msg00468.html (13,394 bytes)
3. [Amps] Parasitic Resistors (score: 1): Author: "" <dcoffman@iquest.net>; Date: Wed, 28 Jun 2006 08:33:20 -0400; Hello Gentlemen, With the preferred carbon composition resistors becoming hard to get, what type of resistors are the preferred type for use in a parasitic supressor? Thanks, Doug - N9XTF ___________; /archives//html/Amps/2006-06/msg00549.html (6,199 bytes)
4. Re: [Amps] Parasitic Resistors (score: 1): Author: "" <dcoffman@iquest.net>; Date: Wed, 28 Jun 2006 09:11:29 -0400; Peter, I had used some metal film that RF Parts sells as non-inductive 'flame proof'. When you get to talking to them, the 'engineer' will tell you that they are slightly inductive. I am curious if '; /archives//html/Amps/2006-06/msg00552.html (7,478 bytes)
5. Re: [Amps] 50 Mhz brick recommendation (score: 1): Author: dcoffman@iquest.net; Date: Thu, 29 Jun 2006 10:17:29 -0400; Bob, This is my $.02 worth of information. If you have a rig that only produces 20 watts output, try it first during a band opening and see if you enjoy 6 meters. That way you don't buy a piece of eq; /archives//html/Amps/2006-06/msg00630.html (8,290 bytes)
6. Re: [Amps] 50 Mhz brick recommendation (score: 1): Author: "" <dcoffman@iquest.net>; Date: Thu, 29 Jun 2006 14:37:53 -0400; Bob, I know you haven't gotten an answer to your exact question, my apologies. I have seen data that questions the Mirage amplifiers, so I would ask specific questions before I purchased one of those; /archives//html/Amps/2006-06/msg00641.html (9,594 bytes)
7. Re: [Amps] L4-B Power Supply (score: 1): Author: dcoffman@iquest.net; Date: Wed, 12 Jul 2006 10:36:55 -0400; Tom, I did mine by soldering a butt connector to the lead and then soldering a brass solid wire ( Used in the hobby shops as well as the welding industry) in the other end. I then bent them at the co; /archives//html/Amps/2006-07/msg00348.html (8,234 bytes)
8. Re: [Amps] making aluminum heat sinks black (score: 1): Author: "" <dcoffman@iquest.net>; Date: Sat, 22 Jul 2006 10:10:41 -0400; Just a stupid question, what difference does it make what color it has as to the heat it will dissipate? Won't the paint interfere with the thermal contact with the actual metal? I would imagine that; /archives//html/Amps/2006-07/msg00855.html (9,271 bytes)
9. Re: [Amps] making sinks black (score: 1): Author: "" <dcoffman@iquest.net>; Date: Sat, 22 Jul 2006 12:57:54 -0400; Thanks for the information. I never thought of it like that. I would just be worried that a layer of primer and a layer of paint would lessen the heat transfer effect. I think I would opt for anodize; /archives//html/Amps/2006-07/msg00878.html (8,105 bytes)
10. Re: [Amps] AL811, AL811H or AL572 mods to 6m (score: 1): Author: "" <dcoffman@iquest.net>; Date: Wed, 2 Aug 2006 10:11:26 -0400; Hsu, Find a used AL-80A or AL-80B, they convert quite nicely to 6M monoband. 73 - Doug Quoting Hsu <Jbenson@sohu.com>: _______________________________________________ Amps mailing list Amps@contestin; /archives//html/Amps/2006-08/msg00046.html (8,130 bytes)
11. Re: [Amps] AL811, AL811H or AL572 mods to 6m (score: 1): Author: "" <dcoffman@iquest.net>; Date: Wed, 2 Aug 2006 20:12:01 -0400; Surely the output would be extremely low? I don't know if it would be worth all the trouble to construct this amplifier? 73 - Doug N9XTF Quoting Hsu <Jbenson@sohu.com>: ______________________________; /archives//html/Amps/2006-08/msg00058.html (9,544 bytes)
12. Re: [Amps] Stolen Radio (score: 1): Author: "" <dcoffman@iquest.net>; Date: Tue, 22 Aug 2006 16:10:57 -0400; Just for smiles and grins, E-bay always removes Uniden HR-2510 radios from auctions, even if they are unmodified. However they don't bother with President Jackson, Grant or other heavily modified out; /archives//html/Amps/2006-08/msg00610.html (9,437 bytes)
13. [Amps] Parasitic supressor SIDE BAR (score: 1): Author: "" <dcoffman@iquest.net>; Date: Wed, 30 Aug 2006 13:09:07 -0400; Anyone else think a seperate reflector should be created, such as parasitics@contesting.com, or maybe nichrome@contesting.com? Just a thought? Doug - N9XTF ___________________________________________; /archives//html/Amps/2006-08/msg00820.html (6,245 bytes)
14. Re: [Amps] Boycott New Chinese linear Amplifier (score: 1): Author: dcoffman@iquest.net; Date: Wed, 4 Oct 2006 17:05:03 -0400; I don't think that Morons is the appropriate choice of words here. Is this not the type of behavior that you, as the administrator, are attempting to thwart? Do as I do and not as I say? Have a nice; /archives//html/Amps/2006-10/msg00024.html (8,004 bytes)
15. Re: [Amps] Is RF parts still in business? (score: 1): Author: "" <dcoffman@iquest.net>; Date: Thu, 5 Oct 2006 09:14:32 -0400; Angel, I just called their telephone number, (800) 737-2787, and got the automated assistant. They are not open yet, as they hours are 0700 PST. I would try to call them when they are open, Regards,; /archives//html/Amps/2006-10/msg00042.html (8,721 bytes)
16. Re: [Amps] "10 Meter Ban" to be lifted ... (score: 1): Author: dcoffman@iquest.net; Date: Thu, 12 Oct 2006 15:16:29 -0400; Ok, would they be able to supply the anode current for the additional tube? What would be the point in a second tube in an amplifier that would already surpass legal limit? Thanks, Doug - N9XTF Quoti; /archives//html/Amps/2006-10/msg00096.html (8,438 bytes)
17. Re: [Amps] "10 Meter Ban" to be lifted ... (score: 1): Author: "" <dcoffman@iquest.net>; Date: Thu, 12 Oct 2006 16:06:25 -0400; Harold, My apologies, I was under the impression that a single 8877 with the appropriate power supply would produce 1.5KW easily and over 2KW PEP. I assumed that 2 X 8877 would be way over that, agai; /archives//html/Amps/2006-10/msg00098.html (9,971 bytes)
18. Re: [Amps] "10 Meter Ban" to be lifted ... (score: 1): Author: dcoffman@iquest.net; Date: Thu, 12 Oct 2006 14:49:49 -0400; Hello Paul and all others, You all bring up several questions to mind, or rather comments. 1. If an Alpha w/ an 8877 will produce 2500 watts PEP, why would one need a second 8877 in the same amplifie; /archives//html/Amps/2006-10/msg00105.html (13,117 bytes)
19. Re: [Amps] "10 Meter Ban" to be lifted ... (score: 1): Author: "" <dcoffman@iquest.net>; Date: Thu, 12 Oct 2006 14:53:45 -0400; What is the advantage of the second tube? Would the original power supply handle the additional current requirements to drive the second tube to full potential? Thanks, Doug - N9XTF Quoting Paul Chri; /archives//html/Amps/2006-10/msg00106.html (10,351 bytes)
20. Re: [Amps] "10 Meter Ban" to be lifted ... (score: 1): Author: "" <dcoffman@iquest.net>; Date: Fri, 13 Oct 2006 11:40:20 -0400; Bill, Yes, I do care. That was why I was trying to understand why 2 tubes would be used. The only obvious senerio that I could come up with was that someone would be trying to run 4 or 5KW, not the s; /archives//html/Amps/2006-10/msg00111.html (10,044 bytes)

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