Thursday, January 29, 2009


Found this layout for Thomas Henry's LM-VCO from the Analog Synthesizer for the 21st Century. Seems to work fine with the exception of the Sinewave output which is rather lumpy at any setting... My substituted transistors are probably sub-optimal... I have also used a different matched pair, which leads to the interesting sculpture in the corner...

The layout is here:

Thursday, January 8, 2009

Spiced up...

Various attempts at working out the optimal FET for the sine converter on the Buchla 258 VCO - I am going to try a NTE133 and at a pinch a 2N5484 should also work. I am unable to easily source the original one at all..