In a message dated 04-30-14, Roy Witt said to Tom Walker:   
      
   Hi Roy and Tom,   
      
    RW> TW>> the Log Periodic has different director lengths with the formt   
    RW> TW>> one being the Shortest.   
      
   That is a yagi (KLM yagi) with several driven elements connected by   
   crossed feed between each driven element. Behind the driven stack is   
   a reflector and in front of the driven elements there are x-number of   
   normal directors. The yagis of this kind I have experimented with and   
   measured and normally used had four driven elements a reflector and a   
   heap of directors.   
      
   RW>Yeah, and they're connected to the individual booms. Straighten out   
   RW>the schematic and they'll look like a yagi, but it is a LPA (Log   
   RW>Periodic Array) i.e. there is no physical crossover, but there is in   
   RW>a schematic to show that the elements on one boom are connected only   
   RW>to that boom, and the same goes for the other boom.   
      
   RW>Thus!   
      
   RW>           ³ ³ ³ ³ ³ ³   
   RW>feed -->+ÄÄÁÄÁÄÁÄÁÄÁÄÁÄ¿   
   RW>                       ³ The booms are connected here.   
   RW>point-->+ÄÂÄÂÄÂÄÂÄÂÄÂÄÄÙ   
   RW>          ³ ³ ³ ³ ³ ³   
      
      
   This is the real LPA, not a yagi.   
      
   CU AGN, Sam, OH0NC   
      
   aka Holger   
      
   ___   
    * MR/2 2.30 * OS/2 ... Opens up Windows, shuts up Gates.   
      
      
   --- PCBoard (R) v15.22 (OS/2) 2   
    * Origin: Coming to you from the Sunny Aland Islands. (2:20/228)