04-24-14 07:23 TOM WALKER wrote to ED VANCE about Re: Resurrected   
      
    TW> @MSGID: <53598BBA.344.amtradio@capcity2.synchro.net>   
    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!   
      
    TW> A properly constructed DDRR only radiates from the tiny   
    TW> vertical section. The ring, since it is over a groundplane, has   
    TW> nearly all radiation cancelled.   
      
    TW> The DDRR is effectively just a top loaded very short vertical.   
    TW> Since the ground plane effect of a vehicle is pretty good on   
    TW> two meters, it should work OK. It won't be as good as a good   
    TW> 1/4 wl, but it could beat some other bad antennas of course. It   
    TW> should be in the area of a few dB down from a proper 1/4 wl   
    TW> antenna.   
      
    TW> A regular 1/4 wl whip would be a much better choice, unless you   
    TW> are going for a moble or stealth antenna!   
      
   Howdy! Tom, Roy and All Others,   
      
   I couldn't find any A.R.R.L. Radio Amateur's Handbook that had info   
   on DDRR antennas.  The latest issue I have is the 1976 Edition.   
      
   I looked under DDRR, Directional, Disconnunity and Ring in the Indexes   
   of all of the A.R.R.L. Handbooks I have -1957 through 1976- and didn't   
   find any reference for those.   
      
   They weren't mentioned in the Indexes of the 1964 A.R.R.L Antenna Book,   
   nor in the 1962 and 1975 Radio Handbook by William Orr W6SAI.   
      
   The 1964 A.R.R.L. Antenna Book and the 1975 Radio Handbook by Orr has   
   entries for the Log Periodic Antenna in their Indexes.   
      
   I didn't realize the conversation was about Mobile or VHF/UHF Antennas.   
   I was 'thinking' I was reading about HF Antennas until a few days ago   
   when the Light Finally Came On in my head.   DUH!!!!!      
      
   I forgot I had talked earlier in this thread about a Folded-Dipole UHF   
   TV Antenna I made.   
      
   The Antennas I've used For Mobile operating:   
      
   6M Mobile - The Broadcast Radio's Whip Antenna on the car, or the Halo   
               Antenna.   
      
   2M Mobile - Larsen 5/8 Wavelength Whip. I've seen Hams use the Coffee   
               Can Antenna but never had one myself.   
      
   HF Mobile - Hustler Center Loaded Whip.   
      
   ... Got Kleptomania?  Take something for it!   
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