XPost: rec.radio.shortwave   
   From: par@parelectronics.com   
      
   "bradvk2qq"  wrote in message   
   news:1143190373.504547.263380@j33g2000cwa.googlegroups.com...   
   > Buy an aircraft ADF receiver. The Bendix/King KR87 is an excellent   
   > unit. Don't forget to install the loop antenna on a suitably large   
   > groundplane and be sure to correct for QE (Quadrantal Error).   
   >   
   > Brad.   
   >   
   A  loop will not require a ground pane- in fact a local ground plane   
   (aircraft's conductive body) is what causes quadrantal error.   
   As long as your loop is well balanced, showing deep nulls, there should not   
   be a problem.   
   With my 7' rotatable shielded loop ( shielding serving the purpose of   
   balance, no improvement in S/N) I can see over 20dB nulls on ground wave AM   
   stations during the day.   
      
   Dale W4OP   
      
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