[sdiy] XY controller build?

[Terry]

Hi All,
  I made a complete scratch build of a Moog 959 X/Y controller. There is no  
real circuitry other than a limiting resistor to the 959 and it used audio  
taper AB type J 10K pots. Had to be carefull setting it up, as the pot  
travel was about 30 or so degrees and had to be setup with zero volts at  
the center of the stick. Otherwise the full voltage at either end CW or  
CWW was enough to short out your power supply so care is needed setting up.
  The advantage of the Bob Moog design was direct connection to high  
quality pots with no backlash. The AB type J pots had a rotational  
resistance that was the action of the stick. Cheap pots will give less  
than perfect action, but with those old AB type J pots the action was  
excellent.
  The other advantage was the parts required were all easy to fabricate and  
the one L bracket to connect both pots was the real design advantage over  
the typical consumer joystick.
  I wrote out my project on the Moog website. Hopefully the photos show as  
on some browsers they do not. But should give some ideas for a scratch  
build X/Y controller.
Link here:
http://forum.moogmusic.com/viewtopic.php?f=1&t=21438&p=129221&hilit=959+x#p129221

Terry

> Hello, I am considering building an xy controller. What I'd really like
> to do is modify a trs-80 joystick. It is 5 volts and that is what I need
> but I am betting the sprung return to neutral would defeat the
> usefullness. Has anyone ever tried this?
>  Also, as an alternative I found Ken Stone has boards for sale, but I
> couldn't find any other kit? Anyone know of another?
>  Thanks. Joe Frey.
>
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