Boss OC-2 Octave pedal schematic diagram

The Boss OC-2 Octave pedal produces additional tones, one and two octaves below the original note. The pedal has a direct level control knob for exact tonal shaping and separate controls for octave 1 (OCT1) and octave 2 (OCT 2).

The OC-2 was sold from 1982 to 2003. The pedal was painted originally in a much lighter brown color and it was labeled Octaver. The name changed to Octave in 1984 and the darker shade of metallic brown was introduced about a year later.

Specifications:

• 3 Controls: Octave 1 Level, Octave 2 Level and Direct Level
• Connectors: Input, Output, AC Adaptor
• Recommended AC Adaptor: ACA Series (black label) or PSA Series (silver label)
• Current Draw: 4mA (DC 9V)
• Weight: 400g

ICs, transistors and diodes used in the OC-2:

• IC1-IC5: TL022CP dual operational amplifiers
• IC6: BA634 (Single T-Type Flip-Flop IC)
• IC7: uPD4013C (Dual D-Type Flip-Flop IC)
• Q1, Q3, Q4, Q7, Q8: 2SK30ATM-Y (N-channel JFET transistors)
• Q2: 2SC732TM-GR (NPN silicon transistor)
• Q5, Q6: 2SC1815-Y (NPN silicon transistor)
• D1: S5500G (400V, 1A switching diode)
• D2: RD5.1EB-3 (500mW 5.1V Zener diode)
• D3-D9: 1SS133 (switching diodes)
• D10, D11: 1S-188FM (Germanium diodes)

See also: