> I will want a regulated supply though, cause there are opamps involved.
Does not follow. Most op-amps have very good supply rejection; within wide limits, they don't care what you feed them. Because the ear is sensitive to buzz, you want low ripple: couple big supply caps will do the job, and is more perf-board friendly than regulators.
> Anyone have any idea what the 47k lin pot in the top left corner does? Near the CV inputs? (heh, are those inputs even? I need to do some more staring at this schematic!)
Are you building a voltage-controlled synthesizer? Or a box with a knob?
"Pitch" and the "CV" inputs allow you to set the center frequency with a voltage. In an original Moog, the oscillators were also voltage controlled. To pick-out a specific harmonic of a voice that melodically hops around in pitch, you feed the same pitch-control voltage to oscillator and filter. That will track the fundamental; to track a harmonic you introduce an offset voltage. If you don't want exact Volt/Octave tracking, you feed the CV pots and turn them to the desired mistracking.
If you have ever worked with such a machine, you are in awe of Carlos' Switched-On Bach. Getting one oscillator and one filter to track is maddening: microvolt offset and drift cause many-cent errors in pitch, sometimes drifting enough in a 60-second passage to sound like Bach's organ-pipes are shrinking. Even though Moog potted the loggers and used accurate regulation. Making multi-voice music on a Moog: awesome.
However, since you don't know the CV inputs, I bet you are wanting a knob-tuned filter. And you probably won't need the very high Q settings needed for harmonic-tracking. In that case, initial accuracy is meaningless, and drift is less problematic than Moog-tracking.
The frequency setting is a direct function of supply voltage plus a log function of supply voltage. 6% drift in supply voltage will move the frequency one musical semi-tone. If this clone were Moog-scaled, 80mV of drift at the CV summing resistors would shift pitch one semi-tone.
If you actually set the frequency to the nearest semitone (which implies a Q over 10; not musically useful outside a voltage-controlled synth), and your power company is wandering from 115V to 120V, you will notice. Of course, if it wanders from 115V at 5pm to 120V at 3am, you may not notice.
I think it would be musically-fine with 12VAC into two diodes, 2x220uFd, 2x470Ω, and a pair of 1,000uFd caps to give low ripple and very-slow pitch change for wall-power variation.
Alternatively: there is no reason it can't run on +/-9V. Demand is under 5mA. It is quite reasonable to do this with Zeners. Say 220uFd, 1K, 9V Zeners bypassed with 220uFd.
Demand is so low, that for many applications it would run happy on a couple 9V batteries.
OH! This is NOT a passable clone of what I thought was Bob Moog's "famous" filter. He stacked two piles of BJTs, with caps between, and drifted the bias current. Clever enough to patent. Also "inaccurate": it uses the BJT's emitter impedances as the R in an R-C network, but emitters are pretty bent Rs. The unintended result was a mellow funky distortion. This contraption with 3080s will do the VCF thing fine, but without any extra flavor.