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[TowerTalk] stacking distance 105BA/204BA

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Subject: [TowerTalk] stacking distance 105BA/204BA
From: (Bill Cotter)
Date: Fri, 27 Jun 1997 10:06:48 -0400
I would like to stack my 105BA on the same mast above my 204BA at the
top of a 75ft Rohn-25 tower. Does anyone have a feel for the minimum
distance between the two yagis to avoid/minimize interaction?

The mast I am using is the Rohn 1/8" wall 2' dia 10ft length supported
by a TB2 at the tower top and a oak-block bearing 2ft below. The bottom
6ft of the Rohn mast has a 1.75" x 1/4 wall 50kPSI tube inserted and
bolted in place. The rotor in shelved 5ft below the top and I will be
using an extension tube to join the mast to the rotor. The length of
this tube can vary to allow the total mast height above the tower
bearing to range from 5-8ft. I would like to extend the mast out of the
tower the minimum amount to provide adequate spacing of these two
yagis. Your feedback appreciated.

Thanks es 73,

Bill N4ALG

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