When I put up my HDBX-48 in the spring, I'm thinking of mounting the rotator at ground level. Has anyone on the list done something similar? What did you use for mast all the way up the tower, and di
Author: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>
Date: Fri, 06 Sep 2013 22:20:28 -0400
Be careful about mechanical resonances. A long mast is in effect a torsion bar that with its flex, the inherent slight give in the rotator, plus the mass of the antenna May result in a low frequency
That is a good point, Roger. Search Tacoma Narrows Bridge for a visual of harmonic oscillation destruction. John KK9A When I put up my HDBX-48 in the spring, I'm thinking of mounting the rotator at g
Taking the mast to the ground is especially appropriate for the Rohn BX/Delhi series of towers as torque up at the top of the tower isn't helpful to the longevity of the rivets... and it's all downhi
I did exactly that, almost, around 1970. HDBX-48 extended to 72'. 1.5" water pipe made out of threaded 10' pieces and coupled with threaded couplers (spot welded). Short collars every 12' or so made
Author: "Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>
Date: Sat, 07 Sep 2013 14:20:19 -0400
I have seen and done numerous installs in Rohn and bigger. Oscillation, to me anyway, is so remote a possibility that I don't even consider it. I use anywhere from 1.5 to 3.5 IPS S40 water pipe and w
Doug, i have a homebrewed kludge. I have a Prop Pitch rotor mounted about 4 ft from the bottom of my 50Ft. tower. On the top is a TH6 about 4 ft above the tip of the tower. 10 ft above that is a 14 e
ON4UN has an excellent description of placing a rotor at ground level, with a full height transmission shaft, in one of the earlier editions of Low Band DXing. Best regards, Scott Doug, i have a home
So many great suggestions! Thanks to everyone for offering advice and experience! Doug K7IP _______________________________________________ _______________________________________________ TowerTalk m