so, i finished my build, got all 3 cores plus the driver going.
HUGE thanks to everyone sharing information in this thread, and to the people who did all the hard work to make the PCB's happend!
the sounds that come out of this thing are pure gold. when they come out. osc 1 is still weather-dependent or something on the pulse, just puts out -5v on some days.
so i can definitely recommend this build! i have a year of SDIY experience, no scope (ableton + line in for tuning duties) and a 10€ multimeter and i managed to pull it off.
here's a pic (please excuse the horrific quality, my htc is 4,5 y old
) of my custom panel (works great, even the 3590s's fit back there, although not even a millimeter between the top rail and them), decided to attach a noise source and a mixer on the panel. i really like the MFOS noise cornucopia, with the options i crammed on the panel especially. and the RYO ampmix brings a nice grit to things when needed. might change up for the newer version tho, that seems to work more versatile.
the rotary switches for waveform selection are a personal preference, i really do that rather than repatch a cable each time.
i flew the v/oct and hi-freq trims to a separate stripboard, and this i can highly recommend. i did this after i had assembled and trimmed everything, only to note that there was prob a quarter of a semitone discrepancy in the oscs over 2 octaves. i mean i want it to 'live' but that was too much for playing anything. after retuning it kept in tune nicely for 3-4 hours of playing yesterday evening, i mean over 4-5 octaves with 3 parallel oscs.
also, the pw goes from what sounds like 10% to 90% in 1/10 the pw pot's movement with osc 2 and 3, go figure... but i like the 50% pulse the most anyway...
would have some questions tho:
1. i get out a very nice sine shape optically, but it always has a sharp peak at one end, cannot get rid or that on any of the converters. could i trim something to iron this out?
2. is there a simple way to bias the sawtooths even a bit? getting any volume out of them is quite hard mixing all 3... of course i could just ass a -v from my MVP in the mix but that's also omitting one of my sources from the mix
3. the vibrato depth pot starts to work at 12 o'clock, ccw from that no effect. any easy way to try to trim this down? i played with the resistors close to the pot to no effect, not even magic smoke.
4. how could i go about setting the rate of the vibrato lower or increasing the range? it's now 1-2Hz at its slowest, i'd like something like 0,1-0,2Hz for the low end.