I've been using a roof mounted HF6V vertical (at about 16') for the 
past 5 years with reasonable results.  I'm currently looking into putting 
up a tower, but in the meantime I'm curious if a roof mounted beam
(say a Force C3/C4 or Cushcraft A4) at around 20' - 25' would do any
better than the vertical.  
I know the rule of thumb with beams is "higher is better", but what is 
the minimum height at which I can expect reasonable results?  or at
least better results than the vertical?
Comments appreciated,
  73 de Doug, N6RT
/*-------------------------------------------------------------------*/
  Doug Brandon        http://www.kaiwan.com/~dab       dab@kaiwan.com
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