In a message dated 05-03-14, Roy Witt said to Holger Granholm:   
      
   GM Roy,   
      
    HG> Nowhere have I heard or read that a Yagi antenna has radials.   
      
   RW>Well, you have heard it now.   
      
   May you live long with your own theory.   
      
      
    HG> The LPA antenna you are writing about has several driven elements   
    HG> The lengts of the driven elements are staggered to achieve a broader   
    HG> bandwidth.   
      
    HG> I know this type particularly well because I have built and measured   
    HG> several concepts for both 2 m and 70 cm and used them actively.   
      
    HG> Behind the stack of driven elements there usually is a reflector and   
    HG> in front of the driven elements directors.   
      
   RW>That's the theory, anyway. And the one that Tom is advocating. IMO,   
   RW>it is not a true LPA.   
      
   That's not theory only, it is a working concept proven over the years.   
      
    HG> This antenna is often called a KLM-yagi because the KLM company was   
    HG> the first to manufacture antennas of thes kind originally presented   
    HG> in an article in QST.   
      
   RW>I haven't ever read that magazine. It is too much ARRL oriented and   
   RW>I'm not a fan of that organisation.   
      
   They do however have a lot of different technical articles that I'm as a   
   licensed technician am very interested in. As such I was also the first   
   ham in OH that in 1956 built and used a SSB transmitter.   
      
   Well, that antenna concept was presented in the 1970's before you were   
   licensed. At that time I was building these antennas and used them to   
   work Auroras as well as the first Oscar satellites and 2m contests.   
      
    HG> The other kind of LPA is one built on two booms insulated from each   
    HG> other and fed from (often) the front end.   
      
   RW>Correct and this is the subject of this LPA discussion.   
      
   The discussion seems to have gone astray somewhere.   
      
      
   CU L8ER,   
      
   Holger   
      
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