"VOLUME CONTROL KNOB SHALL BE COUPLED TO A TWO-SECTION VARIABLE ATTENUATOR,300 TO 320 DEGREES ROTATION,STOPPEDAT EITHER END,RIGHT MODE SELECT KNOB SHALL BE COUPLED TO A 12-POSITION ROTARY WAFER SWITCH,WITH 30 DEGREE TRAVEL BETWEEN POSITIONS,POSITIVE DETENTS SHALL BE AT EACH INDICATED POSITION REQUIRING 18-64 IN. OZ. TORQUE TO ROTATE KNOB OUT OF DETENT,KNOB TRAVEL AT 5 INDICATED POSITIONS,X-Y SELECTOR SHALL BE GEARED TO A 2 POSITION COUNTER WHEEL,X WILL SHOW IN CHANNEL WINDOW OPENING,Y WILL BE INDICATED,UNIT CHANNEL SELECTOR WILL BE GEARED TO 10-POSITION COUNTER WHEEL AND CHANNEL SELECTOR TO TENS AND HUNDREDS"