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Total 9 documents matching your query.

1. [Towertalk] 20M Yagi ? (score: 1): Author: WD4K_1@Bellsouth.net (WD4K); Date: Mon, 15 Jul 2002 13:50:07 -0600; Considering the recent discussion of the OWA, before planning this project I need some opinions. I have my main 110'Rohn 55 tower filled up and going up now but want an excellent performing 20M yagi; /archives//html/Towertalk/2002-07/msg00405.html (38,974 bytes)
2. [Towertalk] 20M Yagi ? (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Tue, 16 Jul 2002 14:36:04 +0100; in the three main directions. Any suggestions before I start planning this next project? This is a very complex question best answered with: 1. N6BV's Terrain Analysis (YT) available with recent ARRL; /archives//html/Towertalk/2002-07/msg00430.html (8,065 bytes)
3. [Towertalk] 20M Yagi ? (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Tue, 16 Jul 2002 11:32:28 -0400; In his book Dave Leeson discusses the downward-sloping foreground in some detail (chapter 10). For example, he shows a table of takeoff angle vs signal for a single 14-mhz yagi 100 feet over a 12 deg; /archives//html/Towertalk/2002-07/msg00434.html (8,466 bytes)
4. [Towertalk] 20M Yagi ? (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Tue, 16 Jul 2002 16:49:15 +0100; I interpreted this to mean 800' above sea level and 2-300' above surrounding terrain. Assuming this, the effective height is 2-300' plus the tower height. The immediate terrain near the antenna is ve; /archives//html/Towertalk/2002-07/msg00438.html (8,459 bytes)
5. [Towertalk] 20M Yagi ? (score: 1): Author: i4jmy@iol.it (Maurizio Panicara); Date: Tue, 16 Jul 2002 19:54:29 +0200; Bill, I meant the situation as a 200/300 ft drop, a wall as it happens in proximity of a cliff edge, then a smoother but consistent terrain slope to a total amount of 800 ft. Having tested something; /archives//html/Towertalk/2002-07/msg00439.html (10,376 bytes)
6. [Towertalk] 20M Yagi ? (score: 1): Author: WD4K_1@Bellsouth.net (WD4K); Date: Tue, 16 Jul 2002 13:27:21 -0600; The terrain here is typical of the mid south US area. High hills with gradual slopes. I have a topo but without getting too specific, the hill here is 4 acres on an already high ridge with nothing in; /archives//html/Towertalk/2002-07/msg00441.html (11,651 bytes)
7. [Towertalk] 20M Yagi ? (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Tue, 16 Jul 2002 19:51:32 +0100; This is exactly what I assumed...it's similar to NC terrain. You probably confused I4JMY mentioning 800' elevation above sea level which means nothing. Only elevation above surrounding terrain is imp; /archives//html/Towertalk/2002-07/msg00443.html (10,659 bytes)
8. [Towertalk] 20M Yagi ? (score: 1): Author: btippett@alum.mit.edu (Bill Tippett); Date: Tue, 16 Jul 2002 20:11:48 +0100; I forgot to mention another thing about TA which some may be wondering about. It provides the statistical data on takeoff angles by frequency for different paths between major population areas. N6BV; /archives//html/Towertalk/2002-07/msg00444.html (8,471 bytes)
9. [Towertalk] 20M Yagi ? (score: 1): Author: W4EF@dellroy.com (Michael Tope); Date: Tue, 16 Jul 2002 19:12:21 -0700; Mauri, How about the case where the ground immediately under the antenna is very close, but there is also a nearby cliff? Ray tracing to the point of distant reflection suggests this antenna will pro; /archives//html/Towertalk/2002-07/msg00448.html (12,769 bytes)

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