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1. [Amps] Emergency communication (score: 1): Author: "Chris Hays" <chris@chrishays.com>; Date: Thu, 27 Apr 2017 09:53:00 -0700; Humor aside, one thing that phone transmitters require is power. The fact that you can copy a CW signal at a far lower signal level than a phone signal means that lower power can be effective. There; /archives//html/Amps/2017-04/msg00330.html (8,846 bytes)
2. Re: [Amps] Emergency communication (score: 1): Author: Al Kozakiewicz <akozak@hourglass.com>; Date: Thu, 27 Apr 2017 17:03:53 +0000; Let's not forget that Randy Quaid's sacrifice in Independence Day would have been for naught without "Morse code". Al AB2ZY ________________________________________ From: Amps <amps-bounces@contestin; /archives//html/Amps/2017-04/msg00331.html (10,058 bytes)
3. Re: [Amps] Emergency communication (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Thu, 27 Apr 2017 17:36:50 +0000; -- ORIGINAL MESSAGE --(may be snipped) REPLY: A car battery will power a 100 watt SSB rig for a long time. If you're serious about emergency communications, be prepared. 73, Bill W6WRT ______________; /archives//html/Amps/2017-04/msg00334.html (7,351 bytes)
4. [Amps] Emergency communication (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Thu, 27 Apr 2017 10:57:29 -0700; <A car battery will power a 100 watt SSB rig for a long time. <If you're serious about emergency communications, be prepared. <73, Bill W6WRT using PTT. Jim VE7RF ____________________________________; /archives//html/Amps/2017-04/msg00338.html (7,329 bytes)
5. Re: [Amps] Emergency communication (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Thu, 27 Apr 2017 15:47:06 -0400; The USN had battery powered tube gear well into the 70's and maybe later, for emergency HF communications. These werent car battery sizes either and there were several of them for the 12V required fo; /archives//html/Amps/2017-04/msg00340.html (11,725 bytes)
6. Re: [Amps] Emergency communication (score: 1): Author: "Fuqua, Bill L" <wlfuqu00@uky.edu>; Date: Thu, 27 Apr 2017 20:15:49 +0000; What is sad is that most ham transceivers draw way too much current in receive. Often as much as an Amp. A battery would last much longer if the receive current drain on the battery was a tenth of th; /archives//html/Amps/2017-04/msg00344.html (9,882 bytes)
7. Re: [Amps] Emergency communication (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Thu, 27 Apr 2017 13:29:22 -0700; YES! Wayne Burdick, principal and chief engineer at Elecraft, comes out of the world of backpacking rigs, and his receivers are optimized to minimize current draw. The K3/K3S, designed for desktop us; /archives//html/Amps/2017-04/msg00346.html (9,563 bytes)
8. Re: [Amps] Emergency communication (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Thu, 27 Apr 2017 16:31:07 -0400; Without a lot of compression and clipping the duty cycle for SSB is only 20%. Given 100W out at 60% efficiency, we are looking at roughly 167W input at the 20% duty cycle or roughly 34 watts. Dependi; /archives//html/Amps/2017-04/msg00347.html (9,499 bytes)
9. Re: [Amps] Emergency communication (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Thu, 27 Apr 2017 17:04:17 -0400; This is a bit of thread drift, but LORAN C was the best backup for GPS and easily repaired. Using one satellite system to back up another is not good practice, as both are easily defeated by the same; /archives//html/Amps/2017-04/msg00350.html (12,652 bytes)
10. Re: [Amps] Emergency communication (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Thu, 27 Apr 2017 23:58:15 +0000 (UTC); My K1 draws about 55 mA on receive and puts out 7 watts on transmit. Of course it's CW only. :-) I may get a KX2 one of these days. We'll see. Going back to the topic of amps, I have seen very little; /archives//html/Amps/2017-04/msg00354.html (9,059 bytes)
11. Re: [Amps] Emergency communication (score: 1): Author: "Fuqua, Bill L" <wlfuqu00@uky.edu>; Date: Fri, 28 Apr 2017 03:18:28 +0000; There are exceptions. If you look at the schematics of many transceivers, it looks as if they were designed by committee. Elecraft, TenTech and some others do not have excessive stages and are not cu; /archives//html/Amps/2017-04/msg00361.html (11,415 bytes)
12. Re: [Amps] Emergency communication (score: 1): Author: "Fuqua, Bill L" <wlfuqu00@uky.edu>; Date: Fri, 28 Apr 2017 03:35:53 +0000; Oh, I forgot, most radios don't come with schematics these days. You have to purchase a service manual. I like to see what is in my radios. I got my novice in 62, I was 14 but took the exam when I wa; /archives//html/Amps/2017-04/msg00362.html (13,445 bytes)
13. Re: [Amps] Emergency communication (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Fri, 28 Apr 2017 03:41:46 +0000; -- ORIGINAL MESSAGE --(may be snipped) REPLY: Me too, but these days what you'll see mostly is ICs connected to each other. Not much you can do with that. 73, Bill W6WRT _____________________________; /archives//html/Amps/2017-04/msg00363.html (9,215 bytes)
14. Re: [Amps] Emergency communication (score: 1): Author: Catherine James <catherine.james@att.net>; Date: Fri, 28 Apr 2017 12:37:42 +0000 (UTC); Unless they provide you with the firmware/software, the schematic may not tell you everything you need to know anyway. They will become ever more true as the industry moved to SDR. __________________; /archives//html/Amps/2017-04/msg00371.html (8,716 bytes)
15. Re: [Amps] Emergency communication (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Sat, 29 Apr 2017 02:31:06 -0400; I'll admit the average ham, or even most hams would have a problem understanding computer source code, but all it take is little studying of the particular language used to follow it. OTOH there are; /archives//html/Amps/2017-04/msg00428.html (14,789 bytes)
16. Re: [Amps] Emergency communication (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Mon, 01 May 2017 18:59:53 +0000; Roger, and all, Without a lot of compression and clipping the duty cycle for SSB is only 20%. Given 100W out at 60% efficiency, we are looking at roughly 167W input at the 20% duty cycle or roughly 3; /archives//html/Amps/2017-05/msg00011.html (8,334 bytes)
17. Re: [Amps] Emergency communication (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Mon, 1 May 2017 15:10:54 -0400; The NCX-3 came out in 1962, the Drake TR-3 in 63, and the Swan monobanders in 61 which was only a few years after SSB became serious with the 1957 HT-32, 1959 CE-100V, 1960 HT-37. Before that SSB gea; /archives//html/Amps/2017-05/msg00015.html (15,222 bytes)
18. Re: [Amps] Emergency communication (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Mon, 01 May 2017 19:12:07 +0000; Cathy, My K1 draws about 55 mA on receive and puts out 7 watts on transmit. Of course it's CW only. :-) Well, let me brag a little: My PQD5, homebrew in 1987, draws only 33mA on receive. And it's SSB; /archives//html/Amps/2017-05/msg00016.html (7,887 bytes)
19. Re: [Amps] Emergency communication (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Mon, 1 May 2017 23:55:58 -0400; Agreed! 73, Roger (K8RI) Without a lot of compression and clipping the duty cycle for SSB is only 20%. Given 100W out at 60% efficiency, we are looking at roughly 167W input at the 20% duty cycle or; /archives//html/Amps/2017-05/msg00029.html (9,060 bytes)

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