[FieldDay] Mast inside a section of tower

[Phil Lefever]

At 06:33 PM 6/24/2008, you wrote:
>I know some of you have done a lot more field days than I have done.
>Our group wants to put up a 30ft Rohn tower and have a piece of mast out 
>the top section abt 10ft to have 2 beam antennas on it.
>
>What's the trick to doing that without having to mess with a rotor?

Simple, Just place a 2 x 4 across a few of the rungs of the tower
a few feet below the top of the tower to serve as a surrogate rotor
plate. Fasten either a post or a cup  to the 2 x 4 to hold the mast
in the center of the tower. This of course is assuming that you
have the style of tower top that has the tube the mast can rotate
inside of. Be sure to fasten the 2 x 4 to the tower rungs so it can't
move. Also you should have at least as much mast inside the
tower as you have above it.

To rotate the antenna tie a rope to the front of the lower boom at
the director to drag the antenna around. We have used one of those
spiral screw dog run anchors for the "rotor rope" anchor. A heavy
block can work too.

73

Phil


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Phil Lefever                    KB0NES EN34jt
Twin Cities Repeater Club       Burnsville, MN