I have an aluminum mast (which is 2” OD and 0.25” wall and about 11 feet) out
of the flat top of the Rohn 25. Already I have a M2 17-element 2-meter yagi at
the top of the mast. Below that antenna, and right above the flat top plate of
the tower, I want to put my Force 12 5BA 5-band, 15 element yagi.
With my other tower, 90 feet of Rohn 45, we put up a 6-element Force 12 Mag 620
the first time by simply dropping each of guys and reconnecting once the
antenna was above each guy point. The second time we put it up, after balun
replacement, we used a friend’s tram line and back-stay – of course the mast
was 2” OD and 0.25“ wall and heavy!
I don’t think I want to chance the Rohn 25 at 102 feet with that drop-the-guy
process.
So the question is : will a tram line work or will I bend the mast? Even using
a back-stay might cause undue pressure and bend the expensive mast. And a bent
mast does not rotate nicely.
Steve K7AWB
Nine Mile Falls, WA
DN17es
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