GUYS, ITS LATE, BUT IM TRYING TO REMEMBER AN "INVENTION" I HEARD OF RECENTLY.
THE SHORT MAST WAS FITTED WITH A SPRINGLOADED FLEX JOINT THAT ABSORBED TORQUE
PEAKS UPON BEGINNING & STOPPING ROTATION. SOMETHING SUCH AS THIS WOULD ABSORB
ALOT OF SHOCK & ALLOW LIGHTER TOWER A SAFETY MARGIN. WOULD ALSO REDUCE ROTOR
GOOD LUCK & 73, DOUG / NX4D
Steve Maki wrote:
> firstname.lastname@example.org wrote:
> > One way to alleviate any potential torque issue is to mount the rotator at
> > the base and run a mast all the way up the tower!
> > Even mounting it part of the way down should help a lot.
> My very first tower in the sixties was a HDBX48 which had been extended
> to 72' with a few straight sections, and guyed. I eventually mounted
> the rotator near the base, not due to torque considerations (ignorance),
> but simply because it is such a nasty tower to climb and work on.
> Unfortunately, 70' of 1.5" waterpipe, when attempting to turn and hold
> a 4 element triband quad, has 25 or 30 degrees of total twist, which
> proved to be unacceptable.
> I imagine 40' would have been reasonable, or 70' of high quality mast.
> But at that point, one might as well consider some good tower instead.
> Steve Maki K8LX
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