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Total 20 documents matching your query.

1. [AMPS] True Or Not True #2 (score: 1): Author: 2@vc.net (2); Date: Thu, 6 Sep 2001 10:09:55 -0700; On HF/MF skywave, is a 58% increase in power out (2db) noticable at the Rx end? - R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Subm; /archives//html/Amps/2001-09/msg00077.html (7,462 bytes)
2. [AMPS] True Or Not True #2 (score: 1): Author: doug@nc.rr.com (Doug Hall); Date: Thu, 6 Sep 2001 14:10:46 -0400; When sending data via HF/MF, undoubtedly. I have seen Bit Error Rate (BER) figures that proved it. If you're referring to 75m SSB transmissions, I doubt it. Most of the SSB transmissions I hear on 7; /archives//html/Amps/2001-09/msg00078.html (8,051 bytes)
3. [AMPS] True Or Not True #2 (score: 1): Author: k7fm@teleport.com (Colin Lamb); Date: Thu, 6 Sep 2001 12:19:19 -0700; Rich asked "On HF/MF skywave, is a 58% increase in power out (2db) noticable at the Rx end?" That all depends upon how you define noticeable. If your s-meter is sitting at S-9, and assuming that 6 db; /archives//html/Amps/2001-09/msg00079.html (8,387 bytes)
4. [AMPS] True Or Not True #2 (score: 1): Author: bjk@ihug.co.nz (Barry Kirkwood); Date: Fri, 7 Sep 2001 08:24:51 +1200; By definition, from psychophysics, 1dB is the increase or decrease in signal strength that can be discerned by an average observer on 50% of occasions. A 2dB increase should be discernible by an aver; /archives//html/Amps/2001-09/msg00080.html (9,760 bytes)
5. [AMPS] True Or Not True #2 (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Thu, 06 Sep 2001 13:32:30 -0700; And remember that db are additive, so 2 db from the amp plus 1 db from better coax, plus a db or two from optimizing the beam give you a whole s-unit (about 5 db on most modern s-meters). That's a VE; /archives//html/Amps/2001-09/msg00081.html (8,627 bytes)
6. [AMPS] True Or Not True #2 (score: 1): Author: baycock@HIWAAY.NET (Bill Aycock); Date: Thu, 06 Sep 2001 16:45:41 -0500; Of course a 2dB shift is noticeable- you just have to care, pay attention, and have the right things to "notice" with. Bill-W4BSG - Bill Aycock -- Persimmon Hill Woodville, Alabama, US 35776 (in the; /archives//html/Amps/2001-09/msg00083.html (9,439 bytes)
7. [AMPS] True Or Not True #2 (score: 1): Author: na9d@speakeasy.net (Jon Ogden); Date: Thu, 06 Sep 2001 17:50:21 -0500; Ah, this is true. Maybe Rich has shifted by 2 dB and he's trying to see if we notice! One funny comment, I work with a guy who has a couple of kids. When they get too noisy around the adults he alway; /archives//html/Amps/2001-09/msg00087.html (9,212 bytes)
8. [AMPS] True Or Not True #2 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 6 Sep 2001 21:50:38 -0400; Even 1dB is a huge increase when copying a signal near noise. The error rate changes considerably here when working CW, when I pick antennas that offer even 1dB more S/N ratio. Most S meters are in; /archives//html/Amps/2001-09/msg00090.html (9,193 bytes)
9. [AMPS] True Or Not True #2 (score: 1): Author: na9d@speakeasy.net (Jon Ogden); Date: Thu, 06 Sep 2001 23:30:50 -0500; Yep. You can always tell in the pileups who the guys with the dipoles and 100 Watts are versus the guys with even beams and just 100 Watts. Big difference. 73, Jon NA9D -- Jon Ogden NA9D (ex: KE9NA); /archives//html/Amps/2001-09/msg00092.html (8,752 bytes)
10. [AMPS] True Or Not True #2 (score: 1): Author: g8gsq@qsl.net (Steve Thompson); Date: Fri, 7 Sep 2001 07:51:08 +0100; --Original Message-- From: Barry Kirkwood <bjk@ihug.co.nz> To: Colin Lamb <k7fm@teleport.com>; 2 <2@vc.net>; AMPS <amps@contesting.com>; at towertalk <towertalk@contesting.com> To: <amps@contesting.c; /archives//html/Amps/2001-09/msg00093.html (9,025 bytes)
11. [AMPS] True Or Not True #2 (score: 1): Author: firson@hotmail.com (Firson Maryutenli); Date: Fri, 07 Sep 2001 14:07:16 +0700; If your s-meter is sitting How many db increase for every one S-unit, using as factory standard ??. de YD1BIH _________________________________________________________________ Get your FREE download; /archives//html/Amps/2001-09/msg00094.html (8,780 bytes)
12. [AMPS] True Or Not True #2 (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Fri, 7 Sep 2001 11:00:16 +0200; Hi Firson, it depends by each factory.... Following conventions (traditions) it should be 6 db per S unit and 50 uV for S-9 in HF. Someone had 5 db per division (Drake, for example, if I remember co; /archives//html/Amps/2001-09/msg00096.html (9,473 bytes)
13. [AMPS] True Or Not True #2 (score: 1): Author: N7CXI@SiliconPixels.com (Jim Barber); Date: Fri, 07 Sep 2001 02:47:37 -0700; [snip] Another related problem is keeping the receiver gain flat from 1.8 to 30mhz. You could keep a separate correction table for each band, but that takes a lot of memory space. It would also have; /archives//html/Amps/2001-09/msg00097.html (9,541 bytes)
14. [AMPS] True Or Not True #2 (score: 1): Author: 2@vc.net (2); Date: Fri, 7 Sep 2001 03:25:50 -0700; // 6db=1 S-unit. - R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQ; /archives//html/Amps/2001-09/msg00098.html (8,385 bytes)
15. [AMPS] True Or Not True #2 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 7 Sep 2001 07:10:09 -0400; The Radio Amateurs Handbook can not establish an industry "standard". Even if they tried, it would only be a standard if everyone used or attempted to use it. Most receiver use 3-5dB as the target.; /archives//html/Amps/2001-09/msg00101.html (10,668 bytes)
16. [AMPS] True Or Not True #2 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 7 Sep 2001 20:11:16 -0400; Zero dB S/N is a very workable CW signal for good weak signal CW ops. Many people can even dig below zero dB S/N if the noise is "rough" noise. The reason is noise power is directly related to filte; /archives//html/Amps/2001-09/msg00112.html (8,284 bytes)
17. [AMPS] True Or Not True #2 (score: 1): Author: 2@vc.net (2); Date: Sat, 8 Sep 2001 09:41:57 -0700; // Excellent. - R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUES; /archives//html/Amps/2001-09/msg00127.html (8,761 bytes)
18. [AMPS] True Or Not True #2 (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Sat, 8 Sep 2001 11:55:22 -0500; Many years ago, as weak-signal 2 meter CW was becoming popular, a chap (I forget his name/call) could copy a signal 2 db below the noise level. This was confirmed by testing him, and seemed to be the; /archives//html/Amps/2001-09/msg00130.html (8,511 bytes)
19. [AMPS] True Or Not True #2 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sat, 8 Sep 2001 15:35:07 -0400; Good CW ops can hear well below noise. It is common. -2dB is really not anything exceptional at all Phil. I can clearly hear a tone and copy CW when the noise power is ten dB greater than the tone p; /archives//html/Amps/2001-09/msg00139.html (8,753 bytes)
20. [AMPS] True Or Not True #2 (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Sat, 8 Sep 2001 20:54:27 -0500; As I said, that was in the '50's. One of the best CW ops in the world is Balder, DJ6SI. He uses a cheap Yaesu on his expeditions with only the SSB filter in line. He can not only hear like you can, b; /archives//html/Amps/2001-09/msg00148.html (8,440 bytes)

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