Ah... Thanks!
You're right, the clocks seem to be shared between the two 3005s.
Hmm, I don't seem to get this one. The input pin is pin 13, but if I'm reading it correctly, the output of the A 3005 is connected to the input of B 3005?
And it seems that the output of the 3005, even if it is to be reconnected back into the input of itself or another 3005, needs to be passed through an op-amp. Does that mean I need to do the same for my stack of 3008s?
If not, is it suffice for me to just directly connect the outputs to the input?
You're right, the unconnected pins seem to be used to pass signals through the underside of one 3005 to the other one (or in the case of pin 12, to the op-amp). I managed to find a picture of the PCB.
I also hit another few problems with the schematic.
1. Look at the NE570, specifically, pin 10. Notice that the 7.5kOhm resistor is totally bypassed with such a weird connection and also notice that pin 8 does not seem to be connected. My feeling is that one of those pin 10s is actually a mislabelled pin 8. Which one?
2. Also, can anyone figure out the unknown valued capacitor?
3. I see a lot of electrolytic caps wired to act like an unpolarised cap throughout the schematic. Any reason why they chose to do that over using a ceramic or other types of unpolarised caps? Their values seem to be small enough. Can I just replace them?
4. What specs should the diode to the right of the A MN3005 be?
Thanks again!