Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Tower\s+height\s+increments\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Tower\s+height\s+increments\s*$/: 10 ]

Total 10 documents matching your query.

1. [TowerTalk] Tower height increments (score: 1): Author: WarrenWolff@aol.com; Date: Sat, 16 Oct 2004 03:15:36 EDT; Greeting fellow TTalkers, I have an interesting question. Does anyone know what happens to the radiation lobes for a 40 meter yagi when it height above the ground is changed from 69 feet to 79 feet?; /archives//html/Towertalk/2004-10/msg00418.html (7,366 bytes)
2. Re: [TowerTalk] Tower height increments (score: 1): Author: "W3YY" <w3yy@cox.net>; Date: Sat, 16 Oct 2004 07:40:13 -0000; Warren - Using HFTA and modeling a 2-el 40-m beam over flat ground, the lobe moves from an elevation angle of about 29 deg at 69ft to 25 deg at 79ft. It's probably not worth going through a lot of ex; /archives//html/Towertalk/2004-10/msg00419.html (8,456 bytes)
3. Re: [TowerTalk] Tower height increments (score: 1): Author: "Jim Lux" <jimlux@earthlink.net>; Date: Sat, 16 Oct 2004 08:24:31 -0700; Get a copy of the 2004 ARRL antenna book and there's a program in there called HFTA that can answer your questions. It will plot the lobes against statistical predicts of incoming elevation angle for; /archives//html/Towertalk/2004-10/msg00423.html (9,254 bytes)
4. Re: [TowerTalk] Tower height increments (score: 1): Author: "Jim Lux" <jimlux@earthlink.net>; Date: Sat, 16 Oct 2004 08:31:08 -0700; Of potentially more interest might be what happens to the gain at say 5 or 10 degrees elevation angle, rather than where the main lobe happens to point. In this particular case, with "average ground"; /archives//html/Towertalk/2004-10/msg00424.html (8,635 bytes)
5. Re: [TowerTalk] Tower height increments (score: 1): Author: "Guy Olinger, K2AV" <olinger@bellsouth.net>; Date: Sat, 16 Oct 2004 12:04:05 -0400; -- Original Message -- From: "Jim Lux" <jimlux@earthlink.net> and the peak elevation angle for propagation on 40 is only 3 degrees above the horizon While I agree with the admonition to consider the; /archives//html/Towertalk/2004-10/msg00427.html (10,661 bytes)
6. RE: [TowerTalk] Tower height increments (score: 1): Author: "Dick Green WC1M" <wc1m@msn.com>; Date: Sat, 16 Oct 2004 12:20:04 -0400; EZNEC gives similar results -- a 40-2CD at 69 feet has a radiation angle of 27 degrees, while the same antenna at 79 feet has a radiation angle of 24 degrees. Three degrees wouln't be worth the work; /archives//html/Towertalk/2004-10/msg00428.html (10,641 bytes)
7. RE: [TowerTalk] Tower height increments (score: 1): Author: "Dick Green WC1M" <wc1m@msn.com>; Date: Sat, 16 Oct 2004 12:24:26 -0400; EZNEC shows the gain increasing about half a dB from 69 to 79 feet. However, it also shows the gain dropping back .5dB at 110 feet, where the angle is more desirable. I suspect these minor gain diffe; /archives//html/Towertalk/2004-10/msg00429.html (9,930 bytes)
8. Re: [TowerTalk] Tower height increments (score: 1): Author: "Jim Lux" <jimlux@earthlink.net>; Date: Sat, 16 Oct 2004 15:30:29 -0700; I agree with Guy that one needs to be aware of the actual modeling, etc. However, the propagation model in VOACAP is independent of the application (yes, it can generate link probabilities, etc, of g; /archives//html/Towertalk/2004-10/msg00433.html (14,378 bytes)
9. Re: [TowerTalk] Tower height increments (score: 1): Author: "Michael Tope" <W4EF@dellroy.com>; Date: Sat, 16 Oct 2004 12:00:08 -0700; During his talk at Visalia, I asked Dean, N6BV why his TOA statistics showed that takeoff angles would be higher on 10 meters than 15 (he was showing a case study comparing TOAs at W6NL and N6RO). Th; /archives//html/Towertalk/2004-10/msg00483.html (13,132 bytes)
10. RE: [TowerTalk] Tower height increments (score: 1): Author: "Keith Dutson" <kjdutson@earthlink.net>; Date: Mon, 18 Oct 2004 22:10:08 -0500; You would have a slightly lower elevation angle. This may be desirable for those long-range DX contacts but it also means you will be slightly less effective in stateside contests. I currently have a; /archives//html/Towertalk/2004-10/msg00517.html (10,211 bytes)

Current List: 1 - 10
Page: [1]