In a message dated 97-12-24 08:34:40 EST, firstname.lastname@example.org writes:
> i currently have a rohn 25 tower with a ham iv rotor . I am
> thinking of replacing the ham iv with the yaesu g-1000sdx rotator. My
> question is will i need a
> new mounting plate in the top section or will the one used for the ham
> iv be usable .
> The replacement is because of additional antenna load . Or do the two
> rotators have about the same load rating?
For starters, the Ham IV is rated at 2800 ft.-lbs. of Effective Moment.
(EM is a better measure of a rotator's capacity than just square feet.) The
G-1000 has an EM of 2020 ft.-lbs. I would suggest either repairing the Ham IV
or upgrading to a bigger rotator. What exactly are you planning to rotate?
A TailTwister won't fit into 25G (there are a couple of ways to install
one so it's not impossible, just unlikely) so your options are a bigger Yaesu
or Create. The Creates don't have published EM figures but mechanically they
have some improvements over the aforementioned rotators.
73, Steve K7LXC
FAQ on WWW: http://www.contesting.com/towertalkfaq.html
Administrative requests: towertalk-REQUEST@contesting.com