I just picked up a DK-3 Dual Axis Drive Corrector and need some info in the unit. I have searched the net for this model with no results. So, I opened it up to make a pin-out diagram, but everything inside is covered with black hard wax. Looks like the Mfg. did not want anyone making copies of the circuit. Does anyone have any information on this unit? It looks well made with four wires going to each motor connector labeled internally as A / A prime and B / B prime. It also has a voltage regulator (LM7806) on the DC input jack which limits the input voltage to the unit to 6 volts to operate everything. The RA and DEC control circuits appear to be identical with timing crystal's, some type of IC (the mfg. and number data have been ground off) and four final output drive transistors. The controls are 4 direction push-buttons; a speed selector slide switch (1x, 4x, and 32X); and a hemisphere selector slide switch (N – off – S). Any information would be helpful.