Moog-music MF-102 Ring Modulator User Manual download pdf (Page 12)

TECHNICAL INFORMATION

NOTE: The following information is intended for use by people who understand analog electronic circuitry

and have enough practical experience to interconnect sophisticated electronic equipment correctly.

POWER: The MF-102 works satisfactorily on +9 to +15 volts DC and uses about 100

milliamperes of current. If your power adaptor shows up missing or inoperative, you

can power your MF-102 from any other power adaptor with a +9 volt or +12 volt rating

and with the same power connector.

Figure 10 - The ‘+’ terminal must be at the center of the power connector.

If you use a power source that was not supplied with the MF-102, be sure the voltage

never exceeds +15 volts. Power voltages in excess of +15 volts may cause serious

damage to the MF-102's circuit and your power source.

PEDAL INPUTS: All pedal control input jacks are 1/4" tip-ring-sleeve phone jacks. The

sleeves are grounded and the ring terminals are supplied with +5.7 volts which is

current-limited to about 0.5 milliamperes. The tip terminals receive the variable voltages

from the pedals.

Figure 11 - Correct wiring of an expression pedal for the MF-102.

An expression pedal for use with the MF-102 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.

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-102's source of +5.7 volts is not shorted out.

Figure 12 - Correct wiring of a tip-ring-sleeve plug for connecting a pedal control input to a source of external control

voltage.

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Moog-music MF-102 Ring Modulator User Manual Page 12