> The motor speed gives me one turn of the antenna each two minutes. > What I need is one turn in 5 minutes. > This will give me more precision pointing the antenna, the reduction of > the velocity never can be variable, it must be fixed. >=20 > The rotor is a CDE Ham IV, and has some gears to reduce the motor=B4s > velocity. You'd do best to change the gearing, then. What country do you live in? In the USA, McMaster-Carr (www.mcmaster.com) is a pretty good source for all things mechanical, including the gears you'll need. Mike H. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist