Greetings TOM!   
      
    TW>> but about Balun Matching or 1/2 wavelength Coax matching a dipole   
      
    RW> Baluns are used to tune the antenna to 50ohms. A 1/2 wavelength of   
    RW> coax isn't matching the antenna to anything.   
      
   I've experimented with the idea that any length of coax in 1/4 wave   
   increments can be used to match a load, but that isn't true.   
      
   What I've done is to make a pair of 6 element yagi antennas and have   
   stacked them together at a spacing determined by frequency and a stacking   
   formula.   
      
   I then fed them with a mulitiple 1/4 wavelength of coax between each of   
   those antennas.  Placed a SWR meter between them at the feed point and the   
   SWR is too high to cut and tune with coax.   
      
   Instead, I made Gamma matches and installed them on each yagi. I matched   
   one antenna at a time to 1:1. I did the same for the other antenna.   
      
   Then, re-installing the center fed coax splitter cut to multiples of 1/4   
   wave to make up the length I needed on each side of the center feed   
   point. The SWR on the line at the center feed point was as near to 1:1 as   
   could be. Those antennas worked very well. And they made the move to Texas   
   with me.   
      
   On another note, I also made a pair of 6 element Quagi's and also tuned   
   those with a gamma match in the same manner as the Yagi' above.   
      
   From a box canyon in Poway, with a window to the east only, I used those   
   antennas to talk to repeaters on Mt San Miguel and Mt Otay.   
      
   Those repeaters at UHF were inassessable with any other antenna system   
   from that location. If you drove down the street two blocks to Pomerado   
   Rd, there is a window to the south where a mobile can use those repeaters.   
   However, a 5watt walkie talkie isn't quite powerful enough and doesn't   
   have enough antenna (1/4 wave) to make that possible.   
      
      
       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)