In a message dated 97-07-03 00:23:12 EDT, k6ll@JUNO.COM (David O Hachadorian)
> On Tue, 1 Jul 1997 13:53:32 -0700 (PDT) Pat Barthelow <email@example.com>
> >will the Ham-4 handle any of the followinng antennas:
> >1. Cush craft 20 Meter Monobander, CD 20-4
> >2. Hy Gain KT-34XA, 32 ft. boom
> >3. Cushcraft 2el 40 meter
> >4. KLM - Custom, 5 el 20, 56 ft Boom
> >5. KLM 5 element, 15 meter beam, 35 ft boom.
What you need to do if determine the Effective Moment (EM) of each
antenna and match it up against the EM figure in the Hy-Gain catalog.
Effective Moment is the turning radius times the weight. For example, the
20-4CD is 23.75 X 55 = 1306 ft.lbs. of EM; the rating of the Ham IV is 2800
BTW, the MARC (Mast, Antenna and Rotator Calculator) Program calculates
the EM and recommends an appropriate rotator.
73, Steve K7LXC
TOWER TECH -- professional tower supplies for amateurs
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