Re: Using a dipole as a vertical

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From: Lashley.H.Mann.II@cdc.com
Date: Tue Sep 13 1994 - 12:52:13 EDT


     Mike,
     
     I've not used a dipole in a perfectly vertical situation but using
     them in a sloping orientation showed me that you will want the center
     conductor of the coax attached to the upper leg (in your case the top
     leg) of the dipole. If the entire antenna is suspended more than
     say 40 feet above ground then it may not make a difference.
     
     As far as performance goes, just consider the pattern of a dipole
     (basically a donut around the axis of the wire) and that you are
     rotating it 90 degrees. It basically puts the main lobe of the
     antenna on the horizon.
     
     Lee
     

______________________________ Reply Separator _________________________________
Subject: Using a dipole as a vertical
Author: Mike J Pulley <Mike_J_Pulley@ccm.ch.intel.com> at Internet
Date: 9/12/94 14:07

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>From: Mike J Pulley <Mike_J_Pulley@ccm.ch.intel.com>
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To: qrp-l@netcom.com
Subject: Using a dipole as a vertical
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Text item: Text_1
     
     I'm getting *jazzed* about the QRP Afield event coming up this
     weekend! I haven't heard much chatter about it recently on the
     net, though. Hmmm. <rub beard thoughtfully>
     
     I plan to run 20m from the 7000' msl Rim country of AZ, amongst
     the largest stand of Ponderosa pines on the planet. The rig is
     the MFJ 9020.
     
     I intend to suspend one leg of a 20m folded dipole between some
     trees and hang a rock from the other end to form a vertical. The
     coax will be perpendicular to the dipole for a while before it
     drops vertically to the ground.
     
     My question is will it work? Has anyone ever played with
     standing a 20m dipole on its ear? What would you expect in
     tuning and performance... a bone crusher or a bone head?
     
                  lanyard
         ______________________ ______________________
        (~~) o (~~)
       ((())) | ((()))
      ((\||/)) | folded dipole ((\||/))
       \\||// coax | \\||//
        \||/ =================O \||/ Ponderosa Pine
         || | | || (impressionist
         || | | || rendering)
         || | | ||
         || | ___ o ||
         || ==|___|* | ||
         || le rig # le rock ||
     
     Regards,
     
     -- Mike, WB4ZKA
     
     If 5W QRP is pronounced "querp", is 2W QRP pronounced "twerp"?
     ==============================================================
     Mike Pulley Intel Corporation
     Phoenix, Arizona (USA) Mike_J_Pulley@ccm.hf.intel.com
     ==============================================================
     
     


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