A colleague has recently purchased a Welte Mignon, in light wood
case, from a former music college.  The instrument is un-touched and
complete, apart from the obvious.  At some time the original motor was
taken out and a modern motor was fitted, but that is no longer there.
All the rest is there.

Can somebody let us know what the motor specification should be, e.g.,
horsepower?  I have had a number of these but never really looked!

It is, I believe, a DC series wound motor?  As obviously it would need
to be to work through the switching resistor.  Any advice you can give
I will pass on to him.

He may be looking to sell it as he underestimated the amount of work
in doing this instrument, but it would be a good project as it is
totally untouched and it comes with over 100 'Red' rolls.  It is
situated near London in the UK.

Jonathan Holmes
Penzance, UK

 [ The foremost requirement for the electric motor of a reproducing
 [ piano is "silent."  The AC/DC universal motors fitted by Welte
 [ included a series-wired design in which the brush holder frame
 [ could be rotated in order to adjust the speed.  The motor provided
 [ with a Welte-Mignon-Reproduktionsklavier for operation from D.C.
 [ mains power typically had a nameplate rating of 1/6 horsepower
 [ at 1200 RPM.
 [
 [ A suitable substitute would be a 6-pole induction motor from a
 [ 1920s reproducing piano of any make.  (Ignore the "motor speed"
 [ command of the T-100 'Red' music roll.)  -- Robbie