Hi Group, Bill Chapman asked if any tubular-pneumatic organs still
existed.  My 2M/4R Unified Reproduco is a tubular-pneumatic organ.
The side chest is connected to the console by tubing.  In my case the
tubes are only about three feet long.  The keyboards and tracker bar
are teed together.  A hole in the roll opens a tube to atmosphere.
Depressing the same key opens a hole at the rear the key to the same
tube.

With the console and side chest next to each other there is no delay.
When I purchased the organ it had connecting blocks on each unit.  This
led me to believe that the two units were set at some distance apart
in the original location.

Jack M. Conway, Los Angeles, California, USA