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Re: [wsjtgroup] Question about antenna height versus performance

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  • w5uwb2@aol.com
    The higher the better for the longer DX as your main lobe would be lower. At 12 agl methinks you could work E s and M.S. but at shorter ranges, i.e. less
    Message 1 of 2 , Feb 28, 2009
      The higher the better for the longer DX as your main lobe would be lower. At 12' agl methinks you could work E's and M.S. but at shorter ranges, i.e. less than 1200mi.
       
      Trees/houses? Try and get your antenna above them and also higher than nearby power lines.
       
      73 - John W5UWB
       
      In a message dated 2/28/2009 6:59:46 P.M. GMT Standard Time, mlunday@... writes:
      OK, I need some clarification.

      What is recommended for antenna height for 6 meters? 

      For normal F layer skip propagation (say in 2011 when the cycle hopefully
      peaks), minimum height would be a half wavelength (thinking back to classic
      dipole theory here), with acknowledgement that higher elevations give lower
      angles but with lobes.

      For line-of-sight, higher is always better.

      What about for Sporadic E using JT6M?  What about meteor scatter?  If I
      could get a 6 element yagi but only mount it 12 feet high, would it still
      work for MS and Es? 

      And what about surrounding buildings/trees?

      Mark Lunday
      WD4ELG
      wd4elg@...
      http://wd4elg.net




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