6 Element 15M Yagi 48 ft Boom
Height 2340.000
21.000 21.225 21.450 MHz
6 elements, inches
            0.8750    0.7500 
  0.0000   72.0000   70.1822 
 50.5432   72.0000   60.2349 
108.1917   72.0000   58.9181 
235.5508   72.0000   55.5817 
403.9829   72.0000   53.2540 
570.0000   72.0000   46.1496 

Use H key to set elevation angle to 3.5 degrees

T-match parameters: 
Rod diameter 0.5" 
Rod spacing  5" 
Rod length   31" 
Lead length  3" 
Series Cap   99999 pf
Feed Z       200 ohms
   
Experience indicates that the driven element tip
must be lengthened to 67 inches, the length that
produces a modelled impedance of +j20 at 21.225 MHz