Greetings TOM!   
      
    RW> TW>>  While the twin boom Log periodic popular some are Single Boom   
    RW> TW>> and the Differeing lengths of the directors,   
      
    RW>> Look at the schematic of a LPA and you'll find that the booms are   
    RW>> part of the excited antenna. In a yagi, the boom is only there to   
    RW>> support the insulated radials and only the driven element is   
    RW>> excited.   
      
    TW> Again you are not paying attention. Tjhere are TWO Styles of LPA   
    TW> antennas.   
      
   Yeah, one with the boom in parallel and one with the booms at a 7.5deg   
   angle to each other. You have proved that with the link below. What you're   
   missing is that you're thinking in terms of a yagi and not in terms of a   
   LPA...   
      
    TW> the one i am adressing is only a Single Bomm with all the elements   
    TW> instlated form the Boom the enable ht6e unique wiring arangement..   
      
   That would be a yagi.   
      
   Every element in a LPA is part of the antenna, where none of the elements   
   are insulated from the booms..   
      
    TW> Here is a picture reference site:   
      
    TW> http://www.antenna-theory.com/antennas/wideband/log-periodic-dipole.p   
    TW> hp   
      
   "If we assume 3 active elements as in Figure 2, then one could argue that   
   this antenna resembles somewhat a 3-element Yagi-Uda Antenna. That is, the   
   driven arm is in the center, the reflector element is the longer dipole to   
   the right, and the director is the shorter dipole to the left as seen in   
   Figure 2. As such, the direction of peak radiation for the LPDA in Figure   
   2 is towards the left."   
      
   Then, if you click on the 'yagi-uda antenna' link in that text, you get   
   this;   
      
   "The Yagi antenna consists of a single 'feed' or 'driven' element,   
   typically a dipole or a folded dipole antenna. This is the only member of   
   the above structure that is actually excited (a source voltage or current   
   applied). The rest of the elements are parasitic"   
      
   Note that in the LPA, each element and the boom are driven (excited)...   
      
   Thanks for helping to make my point.   
      
      
       Have a day!   
      
            R\%/itt - K5RXT   
      
   --- GoldED+/W32 1.1.5-31012   
   --- D'Bridge 3.99   
    * Origin: HAM Radio, aka Amateur Radio. 804? Over! (1:387/22)