From my notes, I think it's something like a 120uf AC capacitor. This

was from an Alliance U-110, I think. Still a click-click type rotor.

Don't assume that such a rotor is not able to be computer controlled. It's a rather easy one to home-brew, since all you have to do is count the clicks. I built one with a Basic Stamp-II (remember them?). Still works. See the top of a desperately out of date home page: http://home.wavecable.com/~ko6th/ where there's a link to the design and code. Should be easy to port to an Arduino or similar.

Greg KO6TH

Gary via AMSAT-BB wrote:

Years ago I used an Alliance U-100 for an elevation rotator. I turned the control box upside down and the "S" indicated "Straight Up". The click box indicator does not lend itself to computer control, and I parted with that setup long ago. I picked up a couple junker U-100s the other day without a control box. I don't really need the control box, but was hoping someone could tell me the value of the starting cap in the control box.

Does anyone happen to know the value of the starting cap in the U-100 control box?

Thanks and 73, Gary "Joe" kk0sd _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb