Yagi 2m 70cm: Difference between revisions
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New page: This antenna was inspirated by DK7ZB's design of [http://www.qsl.net/dk7zb/Duoband/5+8_2m-70cm.htm portable yagi for 2m and 70cm]. All dimensions are in milimeters. Nr Position Leng... |
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This antenna was inspirated by DK7ZB's design of [http://www.qsl.net/dk7zb/Duoband/5+8_2m-70cm.htm portable yagi for 2m and 70cm]. | This antenna was inspirated by DK7ZB's design of [http://www.qsl.net/dk7zb/Duoband/5+8_2m-70cm.htm portable yagi for 2m and 70cm]. Unfortunately 4 mm elements are not enough for permanent use so I recomputed it for 12 mm dipole and 10 mm others. | ||
[[Image:Yagi 2m 70cm dk7zb ok1zia wires.png]] | |||
=Elements= | |||
All dimensions are in milimeters. | All dimensions are in milimeters. | ||
| Line 17: | Line 21: | ||
12 1406.2 302.4 151.2 10 | 12 1406.2 302.4 151.2 10 | ||
13 1435.0 911.2 455.6 10 | 13 1435.0 911.2 455.6 10 | ||
Total length of D=10 is 6.3 m. | |||
=Theory for 144 MHz= | |||
[[Image:Yagi 2m 70cm dk7zb ok1zia far 144.png]] | |||
[[Image:Yagi 2m 70cm dk7zb ok1zia swr 144.png]] | |||
=Theory for 144 MHz= | |||
[[Image:Yagi 2m 70cm dk7zb ok1zia far 432.png]] | |||
[[Image:Yagi 2m 70cm dk7zb ok1zia swr 432.png]] | |||
Latest revision as of 07:45, 21 May 2009
This antenna was inspirated by DK7ZB's design of portable yagi for 2m and 70cm. Unfortunately 4 mm elements are not enough for permanent use so I recomputed it for 12 mm dipole and 10 mm others.
Elements
All dimensions are in milimeters.
Nr Position Length Length/2 Diameter 1 0.0 1024.0 512.0 10 2 93.0 404.8 202.4 10 3 219.0 1009.0 504.5 12 4 242.4 303.0 151.5 10 5 356.6 321.0 160.5 10 6 381.4 947.2 473.6 10 7 500.5 294.2 147.1 10 8 749.1 279.0 139.5 10 9 922.2 931.0 465.5 10 10 951.2 308.8 154.4 10 11 1132.2 238.8 119.4 10 12 1406.2 302.4 151.2 10 13 1435.0 911.2 455.6 10
Total length of D=10 is 6.3 m.
Theory for 144 MHz
Theory for 144 MHz
