I have a 1935 George Steck Ampico A/B reproducing grand piano.
It has a B stack, B drawer, a single A crescendo feeding both
A expression units. It has no action/pump equalizers.   The
expression units are abbreviated, modified A units with no
re-regulators.

The piano has been playing flawlessly for about 8-9 years since
restoration.  Recently, the treble expression cancel has stopped
working. As dynamics levels increase on the treble side, they
remain at that ever high level throughout the remainder of the
performance.

I've completely checked over the treble expression unit and
all functions appear to be working as they should, except
cancel.  I've exhausted the usual array of ideas, and am
now reaching out to others in hopes someone can point me in
the right direction.

Ideas, suggestions, tips, etc., would be very much appreciated.

Regards,

Terry

•Terry Smythe               *Sounds of Yesteryear*
55 Rowand Avenue           Restoration and enjoyment of vintage
Winnipeg, Manitoba         automatic musical instruments.
Canada R3J 2N6            
(204) 832-3982             email:  smythe@mbnet.mb.ca
Life is like a piano; what you get out of it depends on how you play it.

___
* UniQWK #5002* Ideas won't work unless you do.