For a while now I've been slowly working on bulding a MFOS Soundlab. I wanted to squeeze it inside a casio, and did a lot of work on that. I eventually gave it up, mainly because of the keyboard. It is very weak, the keys always break off sooner or later, and also it would've been too much work to make the keyboard work as 1V/Oct. The connections on the casio rubber pad buttons under those keys rate something like 150-200 ohms each, so it's no good. You would have to build a custom switch-board and it's just not worth it.

So I was looking for an other little synth or organ or something to be my new soundlab-body when I struck gold. Sami (Es/K.Y.) said he had one of those bontempi solid-state electro organs, and said I can have it but then I owe him one. Ok! Its the same kind as what I used for Roope's WSG/bontempi fusion. It's perfect, because the key-switches are practically just steel wires pressed together by the key.

So, I carefully slaughtered the old stuff out (I'll make something out of the guts yet). Ok, so now the soundlab project is back on my table, and here's some photos:

I used old guitar string wire for the key-switches









aluminum tape for shielding




above: I'm using a 3x4 rotary switch for waveform select on the LFO and source select on the S+H,
MFOS/Ray uses two and three DPDT's but it can be done this way too.
below: filling in the gaps with hot glue...


panel+keyboard finished! (almost)

power supply







everything fits...


wiring


Mini Ruby amp built in.