Topband: Four Square

[Guy Olinger, K2AV]

From: "ADRIAN REES"

...I plan on building a 4 Square for Top Band by running a catenary 
rope around the tops of each tower. Then suspending wire verticals 
from the centre of each rope. (Each Vertical would be 60 - 80 feet 
high) and top loading each vertical, such that they form a T...


What you would have is eight conductors in a box with the towers at 
the corners with something like 1/8 wave spacing between conductors.

You may be able to control the lengths of the wires and match them 
with a 4 SQ box. But the towers *WILL* be in play, carry a lot of 
current, and reradiate at a miscellaneous phase which is not 
controlled by the feed system. This would not be difficult to model 
with the actual sizes and positions and top yagis of the towers with 
base connected to ground, plus the wires. Suggest you do so and get an 
idea of the dynamics before you go to a lot of effort to put it up.

You should also model the specific wires along with the sizes and 
shapes of the "T" for each one.

73, Guy 




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