[amsat-bb] Alliance U-100

[Ed Krome]

I did the same thing only maybe 35 years ago. Selsyn indicator. From the depths of brain... it was prob  50uF. But these are low duty cycle devices; cap is not critical. Use a common 100 uF AC motor cap. It’ll work. I’m presently use a 110uF cap on an ancient TV rotator that was specked for 50. Works fine. (Under full computer control; I added a feedback pot).

Ed Krome K9EK

Sent from my iPhone

> On Nov 28, 2020, at 6:54 PM, Gary via AMSAT-BB <amsat-bb at amsat.org> 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
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