Some swear that polarization for the FM birds is an issue. During scores and scores of demonstrations in front of audiences, I have not ever experienced a dramatic change in received nor transmitted audio working the FM birds by twisting my Arrow 90 degrees during passes. I can only "sense" this phenomenon occasionally during the loss of signal - when a pass is ending.
Does this mean that the Arrow's gain is simply "masking" the phenomenon? I am not sure.
There are a couple plans for building 2M/440 handheld antennas on the ANTENNAS page on my site at ...http://www.work-sat.com