Una corda and double damper lift

[Barbara Richmond]

Hi Paul,

Was the customer complaining of una corda voicing?

I don't believe all pianos/piano actions are designed to miss strings
with the una corda engaged.  The hammers on those designed for missing are 
spaced a hair to the right, so clearing the left string is easier.

Depending on the situation, the fix could be as simple as slicing off a bit
of the right side of the key-end felt.

Or, if there are big alignment problems, shape the hammers and adjust the 
rest block at the bass end of the
action cavity (so the action rests more to the left)--and then re-space and 
realign everything else.  :-[

Or, for una corda voicing you can carefully voice (needle) the hammers 
between the string cuts.

Barbara Richmond, RPT
near Peoria, IL

----- Original Message ----- 
From: "paul bruesch" <paul at bruesch.net>
To: "Pianotech List" <pianotech at ptg.org>
Sent: Saturday, May 24, 2008 4:36 PM
Subject: Una corda and double damper lift


>A client has a Young Chang TG-150, mfg in 2000. When I press the shift
> pedal, it doesn't go down very far, and the action does not shift far
> enough to play only two strings. I adjusted it so that it would shift
> farther, but then the dampers of the wound bichords to the right of
> the break (there are about eight such notes) would lift in pairs...
> for example, playing D3 with the shift pedal down results in dampers
> for D3 and D#3 being raised. This only happens on those eight or so
> notes, not in the plain wire treble, nor in the wound bichords left of
> the break.
>
> Any ideas?
> Thanks,
> Paul Bruesch
> Stillwater, MN
>