Buchla 208 clone

From these parts I am trying to create a working clone of Buchla's Stored Program Sound Source Model 208. I still need some components from Mouser, spring-tank and a front panel. PCB's are from Electric Music Store. uA726 replacement PCB is my own design. Hardware and NOS-parts are from SAMODULAR.

mA726 Proto

This seems to be working! Next test is going to be inside Buchla 208 VCO's.

Moog Prodigy and AS3046

With these SOIC to DIP adapters I managed to change the LM3046 chips with AS3046 SMD drop-in replacement chips. Next I must re-calibrate Prodigy and see how these SMD-chips behave.

mA726

Here is my version of drop-in replacement for uA726 part used in Buchla Easel. I have tested this before here. I ordered the first proto-batch from Eurocircuits. Because of two SMD-parts it's very compact (width = 37mm and height = 17mm). For LM3046 replacement I use ALFA-parts AS3046 (Vbe is matched five times better for the NPN pair than in the original with +- 1mV).

Buchla 208

I am considering the possibility to make my own clone of Buchla 208. Here is the first sketch of the motherboard.

Review of Sonic Landscapes

Here is a Sonic Immersion's review of my latest album Sonic Landscapes.

http://www.sonicimmersion.org/manu-sonic-landscapes/

Eventide H3000-D/SE

Finally found replacement part (jog wheel optical encoder) for my H3000. Adjusting any parameters was impossible when the jog wheel operated erractically. Optical encoder is an obsolete part that Eventide no longer stocks. Studio Electronics Inc. has this part ! It's little bit tricky to replace but I managed to do it and now the jog wheel operates normally.

Mechanical jog wheel with the optical encoder (led + LDR).

Lot of old logic chips inside the H3000 !