Oakley Quad VCA

Documents:

vcad1-um.pdf   Userguide

vcad1-bg.pdf  Buildersguide

Parts: (x2 for quad)

Discrete Semiconductors

BC560 PNP small signal transistor Q1, Q2

1N4148 signal diode D1, D2

Integrated Circuits

TL072ACP dual FET op-amp  U2, U4, U5, U6, U7, U9, U10

LM13700 U3, U8

LM4040DIZ-10.0 10V reference U1*

* The LM4040CIZ-10.0 is also suitable