[CQ-Contest] Re: Antennae Advice - Tribanders

Joe Subich, K4IK k4ik at subich.com
Wed Dec 29 16:06:10 EST 2004



> 
> and feed it on the side for vertical polarization and you 
> would be creaming tribanders at 3x height.
> 

Fed on the side for vertical polarization, the quad (or any 
vertically polarized antenna) loses the "ground gain."  

On 20 meters over perfect ground: 

A horizontal dipole at 35' shows 7.33 dBi at a 27 degree 
     takeoff angle

A vertical dipole with it's center at 35' shows 0.96 dBi 
     at a 13 degree takeoff angle 

At no vertical angle does the vertical dipole outperform the 
horizontal dipole at 1/2 wave above ground.  The Quad may be 
a fine antenna but I would go for a good, modern yagi (the 3 
element SteppIR or one of the Force-12 C3 variants). 

73, 

   ... Joe, K4IK 
 



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