human fly wrote:;p
so, it looks like transistors are replaced by ca3046 ic's?
(is this anything to do with midi cc control?)
No, mostly economy, one chip replaces 5 transistors, and they happen to be pretty well matched, plus one pair is connected as a differential amp already.
human fly wrote:@brassteacher: could the moog mod be switchable, to keep orig
18dB/oct filter? there's a 'res' boost' mod for it that allows filter
to self oscillate; is this the same?
No, the only way to do that would be to build the Moog filter on a daughter card and put a switch between the two. A properly built and calibrated Moog filter can indeed self oscillate, not sure what to do for the original filter, I haven't looked at the schematics yet.
human fly wrote:i read that this unit is 'poorly manufactured' and that solder pads are
prones to lifting, it's fragile etc.
Even "well manufactured" boards are prone to solder pads lifting, especially if they are double-sided with through-plated holes. Those take longer to heat enough to melt solder. It's safer to use solder wick on a double-sided board, and I use a solder-sucker on single-sided ones.
Don Taylor, a.k.a. Brassteacher
"Jack of all trades, master of none, proficient at even fewer..."