[TowerTalk] DIR-DE-DIR on a 40m yagi ?

[jim.thom jim.thom@telus.net]

You folks   that have stepIR   3 el yagis..... I believe you can reverse
the pattern
180 degs.... by turning the DIR into a REF...and vice-versa.

Question is,  can you make  BOTH parasitic elements into  Directors ?
IE:    DIR-DE-DIR.  On paper, it should become a  2 -element,
bi-directional  yagi...with perhaps  4dbd  gain in both directions .   Does
that concept work ?

I'm  assuming equal spaced elements to begin with..and  DE mounted to the
mast...above the boom a bit.

Aside from the 180 deg reversal  feature,  for  SOME applications,  having
gain in 2 x directions at once can be of benefit.

Ok, here's a  dumb question.  What if both parasitic els are tuned as
Reflectors ?   Does it implode on itself,  or is it  still bi-diectional
with gain ?

Jim  VE7RF