Synthechnics

IR3109 Roland Quadruple Operational Transconductance Amplifier VCF Envelope Generator

Made by International Rectifier to Roland's specifications

Used in Roland Jupiter 6 and 8, Juno 6 and 60, SH-101, MC202, JX-3P, Jupiter 4 with sn higher than 800800, MKS 80 revision 4 and other Roland gear. The SMD version is inside the Roland module 80017A.

IR3R05 Roland Quadruple Operational Transconductance Amplifier

Improved version of the IR3109, designed by International Rectifier to Roland's specifications

Used in JX-8P, JX-10, Alpha Juno 1 and 2 models, MKS-50, MKS-70 and the second version of MKS-80

Roland JX-8P potentiometers

Roland PG-800 potentiometers

Roland Juno-106 potentiometers

Roland JX-8P display

µPD8048HC-191 - Roland PG-800 µprocessor

I used to customize some JX-8P with the PG-800 controls in its case. I still have a few processors.

Roland SH-3, SH-3A and SH-1000 VCO circuit clone

Roland SH-1, SH-3, SH-3A power supply replacement

Roland D-50 keyboard ribbon