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Topband: Shunt Fed Tower Info

To: <topband@contesting.com>
Subject: Topband: Shunt Fed Tower Info
From: rmulzer at ger.ibb.gov (Roger Mulzer)
Date: Mon Aug 4 09:14:53 2003
Hello Bill,

the tower including top loading is definitely not too tall. 230 ft equal 
roughly halfwave lambda on 1.8 MHz.
High angle radiation would start at a height of 350 ft. However if you want to 
suspend reflector/director 
wires from top of the tower the exact current distribution which is hard to 
predict with top loading and
especially more "in between loading" is the critical point in getting deep 
nulls to the back or side.

Its not simply an adaption of quarterwave phased or parasitic array techniques 
but more a cut and try 
which doesnt mean careful thinking and planning wouldnt get you close to good 
results. The "fine tuning"
always has to be done in reality.

73s and good luck

Roger, DL5RBW
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