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1. [Amps] 10dB and propagation (score: 1): Author: K3BU@aol.com; Date: Sun, 6 Feb 2005 09:40:26 EST; Box/8170 amplifier. Even though I had measured the amplifier's voltage-gain as x10 with an oscilloscope (20db power-gain), but on the air, I measured 20 - 23db with my calibrated S-meter. Other peopl; /archives//html/Amps/2005-02/msg00190.html (9,410 bytes)
2. Re: [Amps] 10dB and propagation (score: 1): Author: "k7fm" <k7fm@teleport.com>; Date: Sun, 6 Feb 2005 07:05:30 -0800; I used to wonder how come I could use a tri-band beam, advertised at 8 db gain, and an amplifier advertised at 1500 watts and yet be 15 db down from other local stations who were using 3 element mono; /archives//html/Amps/2005-02/msg00191.html (7,047 bytes)
3. RE: [Amps] 10dB and propagation (score: 1): Author: "Rich" <rdjmgmt@socket.net>; Date: Sun, 6 Feb 2005 09:04:45 -0600; Do you know how I can get a map of the duct locations , I have never been lucky enough to live close to one ? Rich kd0zz I used to wonder how come I could use a tri-band beam, advertised at 8 db gain; /archives//html/Amps/2005-02/msg00193.html (7,636 bytes)
4. Re: [Amps] 10dB and propagation (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Sun, 06 Feb 2005 16:05:49 +0000; K3BU@aol.com wrote: I have noticed this effect and I was glad to see more "proof" in Rich's post. See my old propagation article at http://members.aol.com/ve3bmv/bmvpropagation.htm where I speculated; /archives//html/Amps/2005-02/msg00197.html (10,638 bytes)
5. Re: [Amps] 10dB and propagation (score: 1): Author: K3BU@aol.com; Date: Sun, 6 Feb 2005 18:08:32 EST; gain, and an amplifier advertised at 1500 watts and yet be 15 db down from other local stations who were using 3 element mono-banders. Since the power limit is 1500 watts, they would naturally have b; /archives//html/Amps/2005-02/msg00207.html (8,136 bytes)
6. Re: [Amps] 10dB and propagation (score: 1): Author: Ian White G3SEK <G3SEK@ifwtech.co.uk>; Date: Sun, 6 Feb 2005 23:30:46 +0000; Yuri wrote: You guys might try to poke fun at this. But there are many factors contributing to signal levels received at the other end. Antenna pattern, local ground conditions, terrain and propagati; /archives//html/Amps/2005-02/msg00208.html (8,564 bytes)
7. Re: [Amps] 10dB and propagation (score: 1): Author: David Kirkby <david.kirkby@onetel.net>; Date: Mon, 07 Feb 2005 01:46:31 +0000; Ian White G3SEK wrote: Yuri wrote: You guys might try to poke fun at this. But there are many factors contributing to signal levels received at the other end. Antenna pattern, local ground conditions; /archives//html/Amps/2005-02/msg00211.html (11,614 bytes)
8. Re: [Amps] 10dB and propagation (score: 1): Author: "Michael Tope" <W4EF@dellroy.com>; Date: Sun, 6 Feb 2005 18:09:15 -0800; You stole my thunder, Ian. Yuri and Rich seem to be agreeing with each other about two totally different things. What Rich was talking about is path loss that varies as a function of EIRP. In my opin; /archives//html/Amps/2005-02/msg00212.html (10,311 bytes)
9. Re: [Amps] 10dB and propagation (score: 1): Author: "k7fm" <k7fm@teleport.com>; Date: Sun, 6 Feb 2005 19:16:32 -0800; "I don't believe there is ANY transmitter on earth (amateur or pro) that could influence the ionosphere by causing a non-linear behavior in that." Looking at the situation in reverse, if an amateur t; /archives//html/Amps/2005-02/msg00213.html (9,108 bytes)
10. Re: [Amps] 10dB and propagation (score: 1): Author: "Michael Tope" <W4EF@dellroy.com>; Date: Sun, 6 Feb 2005 20:59:05 -0800; would overseas Yes, and if you compare the total energy dumped into the ionosphere by ham radio operators even during a contest, it's a piddle compared to what the international broadcasters are pump; /archives//html/Amps/2005-02/msg00215.html (9,055 bytes)
11. Re: [Amps] 10dB and propagation (score: 1): Author: K3BU@aol.com; Date: Mon, 7 Feb 2005 10:12:25 EST; wrote that. A Quick look at 'Cornell University's School of Electrical Engineering Publications'<< I do not claim to "inventing" refraction. What I was trying to convey (with my rough English) that t; /archives//html/Amps/2005-02/msg00220.html (10,712 bytes)
12. Re: [Amps] 10dB and propagation (score: 1): Author: K3BU@aol.com; Date: Mon, 7 Feb 2005 10:23:43 EST; OK, do some calculating: During the contest, like CQ WW you would have on average about 600 stations CQing their heads off with 1.5 kW into about 10 dB antennas. Some running "plywood boxes" so err; /archives//html/Amps/2005-02/msg00221.html (8,075 bytes)
13. Re: [Amps] 10dB and propagation (score: 1): Author: R.Measures <r@somis.org>; Date: Mon, 7 Feb 2005 08:48:50 -0800; On Feb 6, 2005, at 3:08 PM, K3BU@aol.com wrote: In a message dated 2/6/2005 9:57:54 AM Eastern Standard Time, k7fm@teleport.com writes: I used to wonder how come I could use a tri-band beam, advertis; /archives//html/Amps/2005-02/msg00223.html (9,300 bytes)
14. Re: [Amps] 10dB and propagation (score: 1): Author: "Michael Tope" <W4EF@dellroy.com>; Date: Mon, 7 Feb 2005 08:50:24 -0800; hour the other, would not own FWIW, here are the HAARP antenna specifications: http://www.haarp.alaska.edu/haarp/ant4.html Maximum gain is 20dB at 3 MHz increasing to 30dB at 10 MHz. The array consis; /archives//html/Amps/2005-02/msg00224.html (10,030 bytes)
15. Re: [Amps] 10dB and propagation (score: 1): Author: Colin Lamb <k7fm@teleport.com>; Date: Mon, 7 Feb 2005 08:25:54 -0800 (GMT-08:00); If the transmitted signal did indeed affect something, then a cw note would "blossom" if you held the key down, because it would heat up the affected layer. It would be repeatable and predictable, o; /archives//html/Amps/2005-02/msg00225.html (8,788 bytes)
16. Re: [Amps] 10dB and propagation (score: 1): Author: Colin Lamb <k7fm@teleport.com>; Date: Mon, 7 Feb 2005 09:01:14 -0800 (GMT-08:00); Is the HAARP station available for contests? Colin, K7FM hour the other, would not own FWIW, here are the HAARP antenna specifications: http://www.haarp.alaska.edu/haarp/ant4.html Maximum gain is 20d; /archives//html/Amps/2005-02/msg00226.html (10,967 bytes)
17. Re: [Amps] 10dB and propagation (score: 1): Author: R.Measures <r@somis.org>; Date: Mon, 7 Feb 2005 09:13:12 -0800; On Feb 6, 2005, at 6:09 PM, Michael Tope wrote: You stole my thunder, Ian. Yuri and Rich seem to be agreeing with each other about two totally different things. What Rich was talking about is path lo; /archives//html/Amps/2005-02/msg00227.html (14,094 bytes)
18. Re: [Amps] 10dB and propagation (score: 1): Author: Ian White G3SEK <G3SEK@ifwtech.co.uk>; Date: Mon, 7 Feb 2005 17:14:55 +0000; Yuri wrote: A non-linear medium would have to mean that your signal was directly affecting the ionization density or the refractive index of the troposphere. As I already said, that's wishful thinkin; /archives//html/Amps/2005-02/msg00228.html (11,113 bytes)
19. Re: [Amps] 10dB and propagation (score: 1): Author: R.Measures <r@somis.org>; Date: Mon, 7 Feb 2005 09:19:58 -0800; On Feb 6, 2005, at 7:16 PM, k7fm wrote: "I don't believe there is ANY transmitter on earth (amateur or pro) that could influence the ionosphere by causing a non-linear behavior in that." Stanford Res; /archives//html/Amps/2005-02/msg00229.html (10,841 bytes)
20. Re: [Amps] 10dB and propagation (score: 1): Author: R.Measures <r@somis.org>; Date: Mon, 7 Feb 2005 09:25:24 -0800; On Feb 6, 2005, at 8:59 PM, Michael Tope wrote: -- Original Message -- From: "k7fm" <k7fm@teleport.com> Looking at the situation in reverse, if an amateur transmitter (even operating at illegal power; /archives//html/Amps/2005-02/msg00230.html (11,622 bytes)

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