Buchla format 212r - Dodecamodule

Some pics of a recent build. The 212r is a awesome sounding module.
(video to go up here soon). I would love to hear a vintage one.

These aren't building instructions, just some records for future reference should I decide to
build another..

It was quite a big build .... lost count of time after the first 20 hrs., but I reckon you could knock
one off in a weekend if you put your mind to it. (I'm not a professional technician).

This is PCB 1

PCB 2 ... reverb tank sits in the middle.
Its very much like the setup in a 208r version 1.



One cap exploded while I was testing various +15v to +24V voltage regulators.
I decided to just use my system's external +24v bus.

reverb tank fitted :-)

I've mixed the knobs up on purpose to remind me of the pot values. Davies are all 10k linear.
Serge style are 50k log.


I'm very impressed with the module. I esp like the output amplifier on the right.

I finally understand why there are a mix of 50k & 10k pots. Its a beautiful sound. We have voltage control over amplitude on the top, voltage control of location (left/right channels) in the middle, and CV of the reverb on the bottom.

Videos to be posted soon here.