> Aren't there electrolytic caps where the power comes on to the
> PCB? If so,
> you should be able to determine which is +10V, and which is -10V
> by checking
> the orientation of the caps.
The caps are not the usual polarized can jobs, but ceramics unmarked except
for a series of colored stripes. I've never seen any like them - an attempt
at a color code for capacitance, maybe?
I've figured out where V+ and V- are on the board, but there is an extra
connection to the 6 pin Minimoog socket on pin 5 that goes to pin 14 of a
7337? that I can't identify - if I had to guess, I'd guess +5V.
> 1) What is the resistance of the resistive material across the
> length of the
> ribbon?
Have to check on this. My guess is that the resistive element is not the
metallic coating on the underside of the ribbon itself, but the wirewound
element embedded in the panel that the ribbon presses against.
> 2) Is there a spring mechanism (causing the touch strip to
> retract) of any
> kind on the touch strip of the ribbon?
Yes. The end of the ribbon at the control panel is held in a clamp that is
spring loaded.
> 3) What is the distance between the two strips (conductive and resistive)
> when no touch is applied?
About 1/4".
> 4) On a picture I've seen of the Moog ribbon it appears to have a large
> Cinch/Jones plug in the middle of the cable which terminates to:
> the 6 pin
> Cinch/Jones plug, a two pin Cinch/Jones plug (for the S-trig),
> and two 1/4"
> phone jacks -- one is clearly the ribbon CV out; what's the other one for?
A second CV is available, controlled by a slider on the control panel - I
always controlled filter cutoff with mine.
> 5) Any idea what the resistive material is?
Let me double check this tonight.
Dave Bradley
Principal Software Engineer
Engineering Animation, Inc.
daveb@...