I would go for 5" masts or larger on that location for sure.
A typical ham rotator on that installation will not last very long.
Go for a commercial gearbox and drive like a large garage door opening
device which I used with good success for 9 years until I moved qth.
It was even cheaper then the largest ham rotator by available at that time.
http://www.pbase.com/df3kv/image/50045854
http://www.pbase.com/df3kv/image/50045859
http://www.pbase.com/df3kv/image/21712154
Om my present installation I use a slew ring drive, the mast is 6" with 1/4"
wall, 95000 p.s.i.
http://www.pbase.com/df3kv/image/64082562
http://www.pbase.com/df3kv/image/74546750
http://www.pbase.com/df3kv/image/74546749
73
Peter
-----Original Message-----
From: towertalk-bounces@contesting.com [mailto:towertalk-
Which is better/stronger/wiser to use for ice/wind strength on a mountain
top tower, and why?
a. The 2.0" OD 0.25" wall thickness Chrome Moly 4130N tube, weighing 100
lbs for 18'
b. The 2.5" OD 0.120" wall thickness Chome Moly 4130N tube, weighing 75 lbs
for 18'
And a second question: would it be wise to put a little 4' or 5' lightning
rod above the mast pipe to attract electrons, and if so, is there a
cheap/easy way to affix the lightning rod to the top of the mast, and what
should it be made of...I am thinking of a sacraficial metal element that
might offer protection, etc. and would be very hard to see ("invisible") so
as not to exceed zoning height requirements.
Thanks to all... 73 Ted N9NB trappaport at austin dot rr dot com
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