Quad operational amplifier, DIP-14 | | | | | | | | C3, C4, C5 | 2 | 1M | Resistor | | | | | | | | | | | R3, R21, R27, R28 | 4 | | | Tayda | A-3588 | \** Use only four (4) potentiometers, either 9 mm pots, you're on your own! The jacks, like the SPDT toggle.\* In that case the pots unneeded for expected pot effect direction). 007cc05932.