Mail Archive Search: <+from:w7dd@fia.net>

Results:

References: [ +from:w7dd@fia.net: 5 ]

Total 5 documents matching your query.

1. [TowerTalk] re; Quad vs. Yagi (score: 1): Author: w7dd@fia.net (Don Andersen); Date: Mon, 15 Jun 1998 14:23:47 -0700; When I compare quads and yagi's, I tend to think in terms of db per square foot of wind load rather than boom length. This is a more usefull number when considering what a tower will hold. Don W7DD -; /archives//html/Towertalk/1998-06/msg00538.html (6,866 bytes)
2. No subject (score: 1): Author: w7dd@fia.net (Don Andersen); Date: Tue, 5 May 1998 16:08:15 -0700; David Thompson is correct, Sam ,W1BU, had the strongest signal from the U.S.A. into Europe. My call was DL4NV and I worked him many times. He had no equal. We should not forget that his great dipole; /archives//html/Towertalk/1998-05/msg00200.html (7,639 bytes)
3. [TowerTalk] fresnel zone (score: 1): Author: w7dd@fia.net (Don Andersen); Date: Wed, 6 May 1998 15:44:04 -0700; I have had several questions about "fresnel zone". This is the zone where the transmitted wave hits the ground and is reflected back up to combine with the origional wave. On HF it usually occurs abo; /archives//html/Towertalk/1998-05/msg00240.html (7,297 bytes)
4. [TowerTalk] fresnel zone (score: 1): Author: w7dd@fia.net (Don Andersen); Date: Wed, 6 May 1998 19:31:41 -0700; Hello Lee, As you have noted, the distance from the base of the tower is dependent on the angle of radiation. My 1000' distance would be for a lower angle than your 7 wavelengths (485' on 20m). Using; /archives//html/Towertalk/1998-05/msg00247.html (7,232 bytes)
5. [TowerTalk] fresnel zone (score: 1): Author: w7dd@fia.net (Don Andersen); Date: Fri, 8 May 1998 13:14:56 -0700; Hello Pat, The fresnel zone is the earth in the direction of transmission and reception. The waves hit the earth and reflect at the inverse angle and combine giving a 6db maximum gain. The 6db is not; /archives//html/Towertalk/1998-05/msg00297.html (7,685 bytes)

Current List: 1 - 5
Page: [1]