Electronic -ve regulator box (dynamo) 6 or 12 volt

The wiring for this unit is as follows. The red terminal is earth, normally a looped wire to mounting stud

Manufactured in house, ready to paint and fit.

Solid state 6V Positive regulator. Replaces MCR2/RB108 Mechanical Cut-out (E3L,E3N type dynamos). Compact design in finned Heat sink. This unit