EV>The Handbook I brought up here is the 1976 Edition and I can see a   
   EV>VHF Halo that looks Vertically polarized on page 330 but it doesn't   
   EV>look anything like the 6 Meter Horizontally polarized Halo I used with   
   EV>my Sixer.   
      
   EV>I will go see if I have a 1967 Handbook to see what this here DDRR   
   EV>is all about.  Thanks!   
      
   A properly constructed DDRR only radiates from the tiny vertical   
   section. The ring, since it is over a groundplane, has nearly all   
   radiation cancelled.   
      
   The DDRR is effectively just a top loaded very short vertical. Since the   
   ground plane effect of a vehicle is pretty good on two meters, it should   
   work OK. It won't be as good as a good 1/4 wl, but it could beat some   
   other bad antennas of course. It should be in the area of a few dB down   
   from a proper 1/4 wl antenna.   
      
   A regular 1/4 wl whip would be a much better choice, unless you are   
   going for a moble or stealth antenna!   
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