Circuit no longer available as on photo, successor circuit RM-2, article number: 4056-800 is used here instead.
Tremulant magnet R50, extended, w. circuit
with electronic circuit and adjustable movement for speed and amplitude.
Noiseless running, problem-free effect, efficient effect.
Axle mounted loose in magnet housing to allow direct mounting on diaphragm bellows plate
For the manual of the circuit board please see at the product: 4056800