Bobw55, Wow Bob, I have never seen one like that... It makes sense though. At 60 hertz with the right gearing... I don't know of any way to get the position back from something like that without being concerned about the weather proofing aspect. I might consider some kind of string pot with the string wrapped around the rotating mast. That way you wont have to calibrate it but only once, plus it will give you a linear output. It's always hard to retrofit something that is already built... If you have it down, I would disassemble it and see if there isn't some way to get a pot connected internal... Personally I perfer a pot as a feed back source because of the absolute aspect. Just my thoughts....

Dave Purola,
N8NTA