Erica Synths DIY Rare Parts

Building one of erica synths awesome diy modules? We have a limited supply of rare parts for you!

K140UD12 - Versatile programmable operational amplifier used in the original Polivoks VCF. 
KR198NT1A - Matched transistor IC, used in the Polivoks VCO. 
KR551UD1B – Operational amplifier used in the original Polivoks VCO. 
AS1100CK2- monolithic sample-and-hold (S&H) circuit, controlled by signal LOGIC, stores the instantaneous values of the input signal and for a certain time maintain a  constant  DC  voltage at the output with high accuracy.