2020-05-05, 14:27:17
(2020-04-14, 12:22:40)Rob_Walker Wrote: Hello GBARC. My summer project is get my tower and antennas up. I was wondering if anyone had any mast material I could buy from you. I am looking for some heavy duty 2" mast maybe 10' long. I plan to have about 8' or 9' above my bearing. Locally I can buy 12 gauge galvanized. Thanks for any assistance. 73 Rob
Hi Rob,,, 2" ?? Are you sure?? That's pretty big for the typical ham antenna and rotor....
I see you have a new Wade/Delhi tower going up soon... If you put the rotator inside the top section
with a mast bearing on the top plate the clamps are generally sized for 1-1/2" standard pipe (schedule 40)
which has an OD of 1.9". This will be plenty strong enough for all but the very largest of multi-element yagis..
Make sure you buy Pipe,, not Tubing.. Also, Look for aluminum pipe, it's a lot lighter and probably still
has adequate strength.. Or you can upgrade to schedule-80 aluminum (thicker wall)..
What antennas are you planning?? Do you know the wind loadings ? Would be interesting to calculate
the bending moment at the top bearing...
Cheers,, Paul, VE3PQ