[Towertalk] Spitfire array

[Fred Hopengarten]

On Tue, 19 Mar 2002 07:38:40 -0500 "jljarvis" <jljarvis@abs.adelphia.net>
writes:
> 
> For benefit of those who recommended I look hard at this
> array....the W1FV, K1VR (FVR) Spitfire would make it possible
> to get directional gain from a 75-80' pole, on 80 meters.  
> 
> I haven't discounted that possibility...with a 2 el 40 and
> either lpda or triband yagi for 20-10, on top.  
> 
> Has anyone put a spitfire on a tower which has a stack on it?
> yagis @ 50 & 80', or so?
> 
> n2ea

K1VR has an FVR Spitfire array on a tower which has a three high stack of
tribanders (a TH19DXX), plus a Cushcraft 40-2CD on a Ring Rotor.

The antenna is not designed to out perform a 4SQ. It is designed to yield
more gain in the same physical space as a simple loading of the tower
using it as a gamma-rod fed single vertical with quarter-wave radials. In
other words, the antenna is designed to maximize the use of real estate
and available height for the low bands.

The YCCC article may be found at:
http://www.yccc.org/Features/Spitfire/spitfire.htm
 
http://www.yccc.org/Features/Spitfire/Spitfire%20Dimensions%20(other%20ba
nds).JPG
 
Remember that the dimensions for 160, 80 and 40 in the JPG file are in
feet!


 [A TH19DXX is a TH6/TH6/TH7 -- for those who haven't yet figured it
out.]

Fred Hopengarten K1VR                       hopengarten@post.harvard.edu
Six Willarch Road * Lincoln, MA 01773-5105
781/259-0088 *eFax 419/858-2421

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