Here’s a vero layout for the Boss OC-2. I based this partly on a factory schematic from Boss, a modified schematic for a “chopped” version by Ben Milner and an alternative schematic (using the 4027 IC) by Stellan Lehrberg.
Update (28.05.2011): I populated an OC-2 vero board based on my layout yesterday, and it really didn’t work well. After a little debugging I realized my layout had Q1 and Q2 the wrong way. Correcting this really improved things, but there was still an issue of each pot interfering with the two others. Lehrberg’s schematic differed from Boss’ factory schematic in that he had placed 100k resistors in series with each #2 lug. This seemed to do the trick!
Update (16.08.2011): Boxed this one up tonight. What a fun and cool effect! Recommended 🙂
Update (20.10.2011): Fixed dead layout link.
Update (26.10.2011): A request for voltage readings have been made. I thought I might as well post them here for everyone:
Battery at 9.05v, all pots fully clock wise, effect on, but no signal. Battery after measurements at 8.83v.
I’m being liberal with the ground voltages as some of them were a few millivolts. Also pins 9-13 on IC5 fluctuated quite a bit, but neither are in use so this shouldn’t matter.
Update (08.11.2011): Corrected IC4, pin #5 reading which was a typo (9v).
Update (10.11.2011): There were obviously a couple more mistakes so I re-checked everything and updated the above voltage readings.
Update (19.02.2013): Darren reports that 2N5457 and 1N60 works well as a substitute for 2SK30A and 1N34A respectively (mind the pinout on the 2N5457).
Update (23.09.0213): Here’s the modified schematic for this layout.