Anatomy of a WurliTzer Theatre Pipe Organ

Preset Relay Action

Pressing a Piston Button, below the Manuals, activates the relevant magnet which exhausts the (Red) Primary Pneumatic, above, via channels in the front board, not fitted at this time, which lifts the valves which allows air into the (white) Secondary Pneumatic, above, via channels in the back and top boards which blows the pneumatic openpressing the contact bar down onto the contact wires, not fitted at this time.

As there are 3 pistons on each manual there is a total of 6 actions.

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