> Maybe this will be a fool question, but I want to know how to reduce the
> velocity of a 48VAC little motor used by HAMS to rotate antennas.

Do you mean that you want to control the speed of the motor, or do you
mean reduce it by a set amount?

Controlling the speed of the motor is typically done by an H-Bridge
of some sort.

Reducing the speed by a set amount is typically done with some sort
of gear-box.
-- 
D. Jay Newman           ! Polititions and civilations come and
jay@sprucegrove.com     ! go but the engineers and machinists 
http://enerd.ws/robots/ ! make progress
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