This may be slightly off the group's main focus but I'm desperate for 
information.  A retiring piano technician in the area has GIVEN me part of a 
Hammond "Solovox" system.  It consists of a small wooden tone cabinet marked 
Model J, Series A, with speaker and tone generators, 21" W x 27" H x 5" D.  
You supposedly "attach" it to your piano with the (separate) keyboard mounted 
so that it sticks out from under the piano's keybed.  It has a tuning knob to 
match the piano's pitch.  Problem: The keyboard is missing.  It connects to 
the tone cabinet with three multi-conductor cables with connectors that look 
like the bottoms of large vacuum tubes.  Of the connectors on the tone 
cabinet, one has 11 male pins, the second has 11 female sockets and the third 
has 9 female sockets.  Does anyone know where I can obtain the mating 
keyboard?  How many keys is it supposed to have?  Does anyone have schematic 
drawings?  Does the keyboard have any circuitry other than simple switch 
closures for the notes that would preclude using a substitute keyboard when 
the pin-outs of the connectors are determined?  Thanks in advance for any 
available help.  -John Grant   jrgrant@dc.infi.net for private replys.