[TowerTalk] Director vs reflector

[John Geiger]

With a 2 element beam, you have the option of the parasitic element being either a director or a reflector.  Is there a reason why all commercial 2 element beams use a reflector?  I seem to recall from the ARRL antenna book that you can get slightly more gain out of using a director instead, and it seems that the director would be cheapter to produce than the reflector since it uses less materials.

73s John AA5JG