Greetings Holger!   
      
    RW>>> That isn't LPDA theory...LPD antennas include the boom as an active   
    RW>>> part of the antenna.   
      
    HG> Wrong! The booms are part of the feedline/matching system performing   
    HG> the balancing of the feed and by varying the distance between the   
    HG> booms also performs impedance matching.   
      
   Thus, the booms are included in the design of the antenna. That's what I   
   had already said.   
      
    TW>> where all the elements are insulated from the support boom   
    TW>> and are connected by a crossover wiring system, as in the theory   
    TW>> drawing, so All elements are connected to the coax. Half to the   
    TW>> center conductor and half to the Shield.   
      
    HG> The LPYA has to be fed with a balanced feed which can be achieved   
    HG> with a bazooka if only a balancing act is needed or a toroid   
    HG> transformer or a balun if an impedance match is also needed.   
      
   Which doesn't speak to the fact that the LPYA isn't really a LP antenna,   
   but a yagi with a driven section like the LPDA and 23 parasitic elements   
   like a yagi. A true LPDA would have 27 active elements with no parsitic   
   elements.   
      
       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)