Anatomy of a WurliTzer Theatre Pipe Organ
RELAY
Here the primary box with the magnets and valves has been
attached to the back board.
This should be done before the relay trays are installed in the chest
so that you only need to get past the contact rails with a screwdriver
instead of trying to get around the relay pneumatics as well. Some of
the screws will be hidden by the pneumatics anyway.
Do not put the cover on the primary box yet because you need to put
screws in to the centre pneumatic tray and those holes are inside the
primary box.
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