Build your own Three Element Yagi:
70 centimeters data sheet
Total length of copper tubing required for antenna elements: 3' 4"
Total length of wood required for boom: 1' 5"
ELEMENT             LENGTH (in.)       SPAC. TO REF. (in.)   ELE. DIA. (in.)
Reflector            13.6875                     0               0.25000
Driven               12.9063                5.1250               0.25000
Director  1          12.1563               10.2500               0.25000

Normalized Radiation Resistance at 440.460 MHz is 276.5 Ohms
420.000       8.92       16.23               16.89+j5.8          14.68
420.682       8.96       15.72               16.61+j7.2          14.22
421.364       9.00       15.21               16.34+j8.61         13.75
422.046       9.03       14.72               16.06+j10.06        13.27
422.728       9.07       14.24               15.79+j11.52        12.78
423.410       9.10       13.77               15.52+j13.01        12.28
424.092       9.14       13.31               15.25+j14.52        11.77
424.774       9.17       12.87               14.99+j16.05        11.25
425.456       9.20       12.43               14.73+j17.61        10.72
426.138       9.23       12.01               14.48+j19.19        10.18
426.820       9.26       11.60               14.24+j20.79         9.64
427.502       9.28       11.21               14.01+j22.42         9.09
428.184       9.31       10.82               13.78+j24.07         8.54
428.866       9.32       10.44               13.57+j25.74         7.99
429.548       9.34       10.07               13.37+j27.43         7.44
430.230       9.35        9.71               13.18+j29.15         6.89
430.912       9.36        9.36               13.00+j30.88         6.34
431.594       9.36        9.02               12.84+j32.64         5.81
432.276       9.35        8.68               12.69+j34.42         5.28
432.958       9.34        8.35               12.56+j36.22         4.77
433.640       9.33        8.03               12.44+j38.04         4.28
434.322       9.31        7.72               12.35+j39.89         3.82
435.004       9.28        7.41               12.27+j41.75         3.38
435.686       9.24        7.11               12.21+j43.62         2.96
436.368       9.20        6.81               12.17+j45.52         2.58
437.050       9.15        6.52               12.15+j47.43         2.23
437.732       9.09        6.24               12.16+j49.36         1.92
438.414       9.02        5.96               12.18+j51.31         1.64
439.096       8.94        5.68               12.23+j53.27         1.40
439.778       8.86        5.42               12.3+j55.24          1.18
440.460       8.77        5.15               12.4+j57.23          1.00
441.142       8.67        4.90               12.52+j59.23         1.17
441.824       8.56        4.64               12.67+j61.24         1.36
442.506       8.45        4.40               12.84+j63.27         1.57
443.188       8.33        4.16               13.03+j65.3          1.82
443.870       8.20        3.92               13.26+j67.34         2.09
444.552       8.06        3.69               13.5+j69.39          2.38
445.234       7.92        3.46               13.78+j71.45         2.71
445.916       7.77        3.24               14.08+j73.51         3.05
446.598       7.62        3.02               14.41+j75.58         3.41
447.280       7.47        2.81               14.77+j77.65         3.80
447.962       7.31        2.60               15.15+j79.72         4.20
448.644       7.14        2.40               15.56+j81.8          4.61
449.326       6.98        2.21               15.99+j83.88         5.03
450.008       6.81        2.01               16.45+j85.95         5.46

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