In a message dated 04-16-14, Tom Walker said to Roy Witt:   
      
   Hello Tom,   
      
   Even though you didn't ask me I can give my view on the G5RV antenna.   
      
   RW> TW> Well even though the Balan Losses are measureed in tenths of a DB   
      
   RW>The question isn't about loss, it's about matching an antenna to its feed.   
      
   TW>OK then Mr Antenna Expert. Please enlighted the group how the G5RV   
   TW>dipole antenna can use either 300 or 450 ohm Twinline and make both   
   TW>the 75 Ohm Dipole Antenna and the 50 ohm Transmitter happy without   
   TW>using BALUN   
      
   The G5RV antenna is a compromise as are most multiband antennas.   
   The roots of this antenna stem from the center fed Zepp antenna that is   
   also a multiband antenna.   
      
   Instead of using a transmatch at the end of the open line or twin-lead   
   feeder the antenna is slightly shortened and the feeder cut to a fixed   
   length. NOTE: if the feeder is other than a 300-400 ohm line, as 240 ê   
   twin-lead the feeder length must be shortened by the velocity factor.   
      
   The feedpoint impedance will vary on the different bands but the feeder   
   will act as a matching transformer when the feedpoint impedance is high   
   and as lengthening of the antenna when the length of it is shorter than   
   reuired for the band in question.   
      
   On some bands the feeder will be an odd 1/4 w/l or close to it, and act   
   as a matching transformer, on others just as a feeder.   
      
   The antenna isn't very effective at 40 and 80 meters but is better than   
   no antenna.   
      
   CU L8ER,   
      
   Holger   
      
   ___   
    * MR/2 2.30 * If it ain't broken, let me take a crack at it.   
      
   --- PCBoard (R) v15.22 (OS/2) 2   
    * Origin: Coming to you from the Sunny Aland Islands. (2:20/228)