Kevin,
How about mounting the top antenna to the mast, then hauling that up
and dropping it in the top of the tower? Then ... haul the big LPA to
the top of the tower and bolt it onto the mast.
I prefer to 'pin' yagis to the mast with bolts through the mast, but
some mast materials lose too much strength in that location when that
hole is drilled.
Good luck,
Don
N8DE
Quoting Kevin Shea <fourstar4sale@yahoo.ie>:
Hi,
I am putting up an 80' self supporting tower (AN Wireless HDD-80). I
will be using 2" chrome moly mast with ~ 10 ft of mast above the top
of the tower. To this mast I am planning on mounting a 7-30Mhz, 14
element LPDA and above it approx. at the top (8' separation) a
50-1300 MHz LPDA both from Tennadyne.
While I have many questions the ones here I am seeking answers for are:
Should I lift the antennas already mounted on the mast and lower the
entire assembly into the tower and rotator, or should I have the
mast already attached to the rotator and lift (by crane) the
antennas and mount them to the mast?
If the second option is the chosen method how do I attach the upper
antenna (I am tall but not ten feet tall)? Do I need to drill into
the mast and place steps into it?
Finally, are there any other approaches I should be considering?
Thanks!
Kevin N9JKP
Madison, WI
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