[TowerTalk] Combining antennas

[RICHARD BOYD]

Bill (W4ZV) and others, my recollection of W3LPL's presentations on stacking, at the Dayton Antenna Forum and elsewhere, was that the stack was always equal or better than any individual antenna.  I think this was for two-stacks, like 50/100' on 20, 45/90' on 15 and 35/70' on 10, and the parameter may have included from Maryland to Europe, not sure about that one.  What's your experience?  73 - Rich, KE3Q


  ----- Original Message ----- 
  From: Bill Tippett 
  To: towertalk at contesting.com 
  Sent: Tuesday, February 03, 2004 6:32 PM
  Subject: Re: [TowerTalk] Combining antennas


  N4ZR wrote:
   >My modeling of other stacks, when the two antennas are perpendicular, 
  suggests they basically behave like separate antennas then.

           Pete, my experience has been fairly good with pointing
  my 10m 3-stack at mostly orthogonal angles, but sometimes
  you get some very strange results...especially for backscatter
  signals.  Quite often, I would hear a weak station, and then
  switch to the single antenna in that direction, only to have
  the signal totally vanish.

           The other variable in this is knowing which antenna
  height is best for different target areas at different times of
  day.  You can get a feel for that with VOACAP but there is
  probably no substitute for experience.

           Been playing with both high-angle and low-angle antennas
  on 160 lately and it's amazing to see the difference sometimes.

                                                   73,  Bill W4ZV

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