Hello,  More oddities concerning my 1923 English-built Aeolian Weber
Electric Duo-art upright.  The instrument came to me partially de-tubed
and I cannot make sense of this component, a small chest containing two
outside valves which sits on top of the larger Theme primary/tracker
valve chest, to the left of the tracking pneumatics.

It has a suction feed to both valves, and two separate input nipples,
one to each valve, but the outputs are permanently joined together by
a drill-hole through the wood, and go to just one output nipple.

In effect, if only one valve is triggered (either one) the suction
supply within the chest is connected to atmosphere.  The single output
nipple is also quite small -- 3/32" internal -- odd since two valves
supply it.

As the instrument came to me, the two inputs were labelled 'motor port'
and 'repeat switch',  but I cannot reconcile this with any piping
diagrams I've seen.  Can anyone help?  Photos are available.

Regards,
Jim Ridgewell
jimmy2puds@hotmail.co.uk.geentroep [delete ".geentroep" to reply]