Una corda and double damper lift

[Don Mannino]

Paul,

I would look at the hammer shank spacing over the wippens.  It could be
that the shanks / hammers have been spaced towards the bass, causing the
action to have to move farther than normal to make the una-corda work.
Trimming stop block (or removing shims), spacing the hammers towards the
treble, then resetting the una-corda adjustments might do the trick.

As Owen mentioned, once you are confident that the action is spaced
properly, then look at the damper lever spacing.  I have also on a few
occasions trimmed key end felt to solve this problem.

Don Mannino

On Sat, 2008-05-24 at 16:36 -0500, paul bruesch wrote:

> 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
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