Greetings TOM!   
      
    RW> TW>> Well even though the Balan Losses are measureed in tenths of a   
    RW> TW>> DB the loss of the old single band half wavelength "Coax Balun"   
    RW> TW>> is even less!!!   
      
    RW>> The question isn't about loss, it's about matching an antenna to its   
    RW>> feed. Your xmitter is tuned to match the 50Ohm coax, but the antenna   
    RW>> isn't resonant until it is matched with coax lengths in any length.   
    RW>> Once you get the antenna tuned, you will only have losses in your   
    RW>> coax, no matter how long or short it is.   
      
    TW> OK then Mr Antenna Expert.   
      
   I'm no expert by any means.   
      
    TW> Please enlighted the group how the G5RV dipole antenna can use either   
    TW> 300 or 450 ohm Twinline and make both the 75 Ohm Dipole Antenna and   
    TW> the 50 ohm Transmitter happy without using BALUN   
      
   I'm not familiar with a G5RV, basically because I don't like dipoles.   
   Howevr the manufacturer, like so many other antenna manufacturers probably   
   uses a propriatary device to match the antenna, probably using a internal   
   balun.   
      
   If you were to take a mobile antenna with a loading 'device' (used to make   
   the antenna a 5/8ths wave) in the middle of the verticle rod, like those   
   used in VHF or UHF or even CB antennas and cut them apart, there's nothing   
   there. They probably use a mix of chemical ingredients that is RF excited.   
      
   And I'm not talking about the wire-wrapped coil that you can physically   
   see. Like the one that I made from stainless wire that has a coil in the   
   center to make it a dual band antenna and resembles a commerically made   
   similar antennas. One of those still sits on the window-sill here and is   
   connected to my IC3210a, VHF/UHF dual bander.   
      
      
       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)