I'm kind of curious about this as well. I have been using Gemini Orbit 360 rotators along with a SaebrTrack box which is built around a Basic Stamp module. I believe it's very similar to the WA8SME design. The problem is that the OR-360 rotators are getting hard to come by. I have two working ones and one that doesn't for parts. I worry that someday I'm going to lose a rotator and be up the creek since I can't afford the Yaesu units. Mine are down off the mast right now because I'm working on them. I think that the U-100/U-110 units are much more readily available from Norm's Rotor service. My question would be that since the OR-360 and Yaesu rotators get position feedback from pots and the U-100 series has some type of microswitch for positioning, how are you adapting to that? 73, Michael, W4HIJ ehekman@cox.net wrote:

Norman,

Bob, WB4APR, and Greg, KO6TH, and Dave, K8DAV have written articles about interfacing the U-100 type rotors to the PC. A couple of the links are shown below. I started implementing Greg's method with a rotor controller circuit designed by Mark, WA8SME, using a Basic Stamp module but haven't finished it yet. I would be happy to share some ideas off the list.

http://home.jps.net/~gregd/hamsite.htm http://www.k8dav.com/u100_info.htm

Ed WB6YTE _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb