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Total 22 documents matching your query.

1. [Amps] AL1200 on AM - max carrier? (score: 1): Author: Tony Brock-Fisher via Amps <amps@contesting.com>; Date: Thu, 30 Oct 2014 07:13:09 -0400; I want to run my AL-1200 on AM for a short stint (2 hours operating time, 50% overall duty cycle). I have tested it at about 225 watts carrier output, and with moderately high duty cycle transmission; /archives//html/Amps/2014-10/msg00248.html (7,136 bytes)
2. Re: [Amps] AL1200 on AM - max carrier? (score: 1): Author: "Gary Smith" <Gary@ka1j.com>; Date: Thu, 30 Oct 2014 09:05:27 -0400; One thing for sure, run it at the CW setting, use the lower KV setting and you will run far cooler for a given KW out. 73, Gary KA1J _______________________________________________ Amps mailing list; /archives//html/Amps/2014-10/msg00249.html (7,397 bytes)
3. Re: [Amps] AL1200 on AM - max carrier? (score: 1): Author: Kimberly Elmore <cw_de_n5op@sbcglobal.net>; Date: Thu, 30 Oct 2014 07:04:22 -0700; Any amp will be inefficient when used as a linear amplifier for AM because as drive is reduced, efficiency is reduced. They will all generate a lot of heat in this application. However, the AL-1200 s; /archives//html/Amps/2014-10/msg00250.html (10,305 bytes)
4. Re: [Amps] AL1200 on AM - max carrier? (score: 1): Author: Robert Logan via Amps <amps@contesting.com>; Date: Thu, 30 Oct 2014 09:16:55 -0500; Thought I might mention the legal limit for AM is 375 watts carrier. Bob. NZ5A Sent from my iPhone Any amp will be inefficient when used as a linear amplifier for AM because as drive is reduced, effi; /archives//html/Amps/2014-10/msg00251.html (10,682 bytes)
5. Re: [Amps] AL1200 on AM - max carrier? (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Thu, 30 Oct 2014 10:42:54 -0400; The usual rule of thumb is to run the AM carrier at 24% of the tubes anode dissipation. Figure on an average of 50% efficiency at full DSB AM PEP. Tune up as you normally would for 1500W and keep the; /archives//html/Amps/2014-10/msg00252.html (9,827 bytes)
6. Re: [Amps] AL1200 on AM - max carrier? (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Thu, 30 Oct 2014 10:53:57 -0400; I think I should mention that 375W is for a 100% modulated sine wave. Since speech is asymmetric and various compression/clipping methods allow much higher positive peaks while clipping the negative; /archives//html/Amps/2014-10/msg00253.html (12,314 bytes)
7. Re: [Amps] AL1200 on AM - max carrier? (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Thu, 30 Oct 2014 11:03:03 -0400; "The usual rule of thumb is to run the AM carrier at 24% of the tubes anode dissipation." That was supposed to be 25%. Carl KM1H _______________________________________________ Amps mailing list Amps; /archives//html/Amps/2014-10/msg00254.html (7,741 bytes)
8. Re: [Amps] AL1200 on AM - max carrier? (score: 1): Author: Drax Felton <draxfelton@gmail.com>; Date: Thu, 30 Oct 2014 11:59:20 -0400; And this one too... At all times, transmitter power must be the minimum necessary to carry out the desired communications. _______________________________________________ Amps mailing list Amps@conte; /archives//html/Amps/2014-10/msg00256.html (12,026 bytes)
9. Re: [Amps] AL1200 on AM - max carrier? (score: 1): Author: Glen Zook via Amps <amps@contesting.com>; Date: Thu, 30 Oct 2014 19:00:14 +0000 (UTC); The problem is that "desired communications" is not defined! If the operator desires to have a 40 dB over S-9 (with S-9 defined as a 50 microvolt signal level) at every location, then that operator c; /archives//html/Amps/2014-10/msg00260.html (13,173 bytes)
10. Re: [Amps] AL1200 on AM - max carrier? (score: 1): Author: Robert Logan via Amps <amps@contesting.com>; Date: Thu, 30 Oct 2014 17:13:43 -0500; The word in the regs is "necessary ", not "desired". Bob Sent from my iPhone The problem is that "desired communications" is not defined! If the operator desires to have a 40 dB over S-9 (with S-9 de; /archives//html/Amps/2014-10/msg00262.html (13,750 bytes)
11. Re: [Amps] AL1200 on AM - max carrier? (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Thu, 30 Oct 2014 18:22:57 -0400; "The word in the regs is "necessary ", not "desired". Bob" Both terms are used in Part 97: §97.313 Transmitter power standards. (a) An amateur station must use the minimum transmitter power necessary; /archives//html/Amps/2014-10/msg00263.html (9,719 bytes)
12. Re: [Amps] AL1200 on AM - max carrier? (score: 1): Author: "Roger (K8RI)" <k8ri@rogerhalstead.com>; Date: Thu, 30 Oct 2014 19:02:50 -0400; A note on tuning amps for maximum out, or the legal limit on the SSB ot CW/tune position? There are many amps, particularly older ones with a tune and SSB position as well as many of today's minimal; /archives//html/Amps/2014-10/msg00264.html (15,000 bytes)
13. Re: [Amps] AL1200 on AM - max carrier? (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Thu, 30 Oct 2014 17:31:58 -0700; -- ORIGINAL MESSAGE --(may be snipped) REPLY: That is intentional. Government entities like to have a law or rule on the books that they can use only when they need or want to nail somebody. 99.99% o; /archives//html/Amps/2014-10/msg00265.html (9,003 bytes)
14. Re: [Amps] AL1200 on AM - max carrier? (score: 1): Author: "Gary Schafer" <garyschafer@largeriver.net>; Date: Thu, 30 Oct 2014 23:46:00 -0500; The legal limit on AM is 1500 watts PEP, just as it is for all other modes. There is no 375 watt carrier "limit" set by the FCC. But it does work out to 375 watts of carrier when you modulate to 100%; /archives//html/Amps/2014-10/msg00266.html (16,231 bytes)
15. [Amps] AL1200 on AM - max carrier? (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Fri, 31 Oct 2014 00:09:00 -0700; REPLY: That is intentional. Government entities like to have a law or rule on the books that they can use only when they need or want to nail somebody. 99.99% of the time it is intentionally never en; /archives//html/Amps/2014-10/msg00268.html (9,403 bytes)
16. Re: [Amps] AL1200 on AM - max carrier? (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Fri, 31 Oct 2014 08:18:21 -0400; True if you tune up at 1500W. But if the amp is capable of being tuned to 2000W+, as are the majority of the "big" amps being sold, you can drive it with 120% positive peaks which many do with modifi; /archives//html/Amps/2014-10/msg00272.html (18,770 bytes)
17. Re: [Amps] AL1200 on AM - max carrier? (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Fri, 31 Oct 2014 08:19:04 -0400; The problem is that "desired communications" is not defined! REPLY: That is intentional. Government entities like to have a law or rule on the books that they can use only when they need or want to; /archives//html/Amps/2014-10/msg00273.html (11,061 bytes)
18. Re: [Amps] AL1200 on AM - max carrier? (score: 1): Author: Robert Logan via Amps <amps@contesting.com>; Date: Fri, 31 Oct 2014 07:34:58 -0500; So am I. Sent from my iPhone The legal limit on AM is 1500 watts PEP, just as it is for all other modes. There is no 375 watt carrier "limit" set by the FCC. But it does work out to 375 watts of carr; /archives//html/Amps/2014-10/msg00274.html (16,721 bytes)
19. Re: [Amps] AL1200 on AM - max carrier? (score: 1): Author: Glen Zook via Amps <amps@contesting.com>; Date: Fri, 31 Oct 2014 15:22:57 +0000 (UTC); The necessary power level required to carry out the desired communications is, again, dependent on just what "desired" means! As such, the regulation has no meaning in technical terms. Until "desire; /archives//html/Amps/2014-10/msg00277.html (12,277 bytes)
20. Re: [Amps] AL1200 on AM - max carrier? (score: 1): Author: Michael Clarson <wv2zow@gmail.com>; Date: Fri, 31 Oct 2014 12:53:11 -0400; An example of a "desired communication" (not me, of course!) would be the desire to show off one's station and be the loudest on the net. --Mike, WV2ZOW ______________________________________________; /archives//html/Amps/2014-10/msg00282.html (11,015 bytes)

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