Brian Tuley

I'll start with a circuit board which I've etched using the positive resist process. I'll be following and referring to the Yusynth.com site while I work. There is a pcb trace at the site which has been most useful. It's a single sided trace, so that makes life a little easier when etching pcb's oneself.

There are a multitude of component holes that need to be drilled into the board after it is etched. I've used a drill press and four Dremil style micro bits. They are extremely fragile and not particularly suited to this type of abuse. I'll have to find some stronger bits for next time.

I had bathed this board in liquid tin, but there's no need to prevent copper oxidation on the pcb traces, because I always prefer to solder over the traces anyway. By giving the entire bottom of the pcb a good coating of solder flux (and letting it dry thoroughly) the solder flows like a lazy river. I even solder over the traces to ensure that there is a conductive path to every node. This is likely a common practice. I first noticed it upon inspection of few Mattson Modular pcb's that I own.

There is no top silk screen to the pcb for components placement and so on. I've started by first soldering in the dip sockets, so as to provide a point of reference. Most of the components I have on hand in the shop, so I'm anticipating a quick build.

Moving right along. Almost there.

Had to order 4 x non-polarized 47uf caps. I definitely didn't have those on hand. A real Frankenstein of components seen here. Especially those IC sockets. Not very pretty, but it will work just fine. I use what ever I have on hand.

The non-polarized 47uf caps have arrived. All ready for pots, jacks and a custom panel.

Device under test. The first CV pan meets expectation. I still need to finish wiring the rest of the pots.