This unit simulates electronically the sound of a single note steam loco whistle. It may be loco mounted in the larger gauges (O and above), or used free standing on the home or exhibition layout.

The whistle sound is triggered manually by operating a push switch, or automatically via a loco mounted magnet passing over a reed switch in the track. Loco mounted units can be triggered by radio control, or magnets could be placed in between the rails at strategic intervals, to operate a loco mounted reed. Reed, magnet and push switch are all supplied.

Both whistle pitch and overall volume are adjustable via presets on the board.

Note that a reulated dc power supply is required to run this module (see MPA-1 Mains Power Adapter).

Input voltage: 12 to 18V dc.

Module dims: 70 x 60 x 35mm.

Speaker dims: 50mm dia.