BF-2

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Boss BF-2 Flanger. "The purple one."

Controls

Boss BF2 front.png
  • Knob 1 - "Manual":
  • Knob 2 - "Depth":
  • Knob 3 - "Rate":
  • Knob 4 - "Res": (Resonance)
  • Footswitch 1 - "On/Off": This switch toggle the pedal effect off and on.

Bypass:Buffered/True

Like all Boss pedals, the BF-2 Flanger has a buffered bypass.

General Information

Pedal Manual

Phase Inversion:Unknown

This is a rather unusual schematic. Instead of putting the correct symbol in the schematic for the modulation ICs, they've just drawn actual ICs. We also can't tell the electrical polarity of the ICs that are opamps because "2" and "3", and "6" and "5" are not indicative. We'll have to go looking for the opamps to better understand. To the best of our knowledge, most, but not all opamps have negative on pins 2 and 6, and positive on 3, and 5, but not always. As with other pedals, we'll have to put this on an oscilloscope to make sure whether it inverts phase or not.

Schematic ID Electronic Part Action Phase State
Q1 X X X
IC1b X X X
IC2b X X X
Q2 X X X
IC3 X X X
IC4 X X X
Q3 X X X
IC2a X X X
Q4 X X X
IC1a X X X

On the schematic there are additional opamps and transistors, but they're dealing with modulation and power, not with sound, and so do not directly affect the signal in the pedal.

Schematic

© Copyright 1980, Roland Corporation.

Artists


Additional Sources