Viper MF-105B warranty

Figure 15 – Correct wiring for a TRS CV patch

Figure 14 – Correct wiring for an expression pedal

An expression pedal for use with the MF-105B should contain a 50KW or 100KW potentiometer

which is connected from the sleeve to the ring terminals.

The potentiometer wiper is connected to the tip terminal.

The pedal cable should be shielded, with the shield connected to the sleeve terminal. See Figure 14.

When connecting one or more pedal control input jacks to a source of external control voltage such as an analog synth or a MIDI-to-CV converter, you should use patch cords with tip-ring- sleeve phone plugs. The ring terminal on the plug should not be connected to anything, so that the MF-105B’s source of +5 volts is not shorted out. Or, if you do not plan to use any expression pedals with your MF-105B but would like to apply control voltages to one or more pedal

control inputs, you can use patch cords with regular two- conductor phone plugs. These

will short out the +5 volt supply to the ring contacts. This voltage is current-limited, so you won’t burn anything out, - but no pedal will work in any of the pedal control jacks if a tip-sleeve plug is plugged into even one of the pedal jacks.

Applying a varying voltage to the tip terminal of a pedal control input jack has the same effect as turning the corresponding knob. A voltage change of about 5 volts at the tip terminal is equivalent to turning the corresponding knob through its entire range. You can ‘program’ your MF-105B performance parameters entirely from external control voltages, by turning the ENVELOPE, MIX, and RATE control knobs to 5, and feeding 0 to +5 Volt programming voltages to the tips of the pedal control input jacks. The LFO/ SWEEP jack can also receive 0 to +5 Volt programming voltages.