The Joystick controller uses two D.C.
mixer pcbs, one per axis, each mixing a front panel controlled D.C.
offset and the voltage out of the joystick. The "master gain" control of
the mixer is used to control the range of the output.
The resistor marked RXXk should be matched to the resistance of the pot in
the joystick itself although this value is not critical.
Article, art & design copyright 1999 by Ken Stone