Noisy Dampers on Shift

[Paul T Williams]

That's a good check to do.  You also might see that the back of the damper 
lifts oooo so slightly before the front.  If they're absolutely flat, they 
may have a tendency to produce that "zing" sound on slow release of the 
key.

Let us know how you fixed it!

Paul





paulrevenkojones at aol.com 
Sent by: pianotech-bounces at ptg.org
07/16/2008 01:33 AM
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Re: Noisy Dampers on Shift






Tom:

You might take a look at the trichord felt length (how far down through 
the strings they protrude). You can trim that felt, and compress it, but 
then need to re-time the damper since it will sit just a bit lower. 

Paul. 


-----Original Message-----
From: Thomas Cole <tcole at cruzio.com>
To: Pianotech <pianotech at ptg.org>
Sent: Tue, 15 Jul 2008 11:54 pm
Subject: Noisy Dampers on Shift

I just acquired a client who bought a new F183 Fazioli. Obviously it's a 
very nice piano, but the owner is complaining of improper damper function 
on several notes starting above C4, especially on shift. The hammers all 
shift off of the first string in Faziolis so I can see that there might be 
some phase shift between the strings of each unison challenging the 
dampers, but he's only complaining about a handful of notes in the fourth 
octave.

The fact that the owner is formerly a synth player is likely why this 
effect was so noticeable to him, but I must admit the buzzy cutoff on a 
slow release of the key is not at all subtle. Even the dealer over the 
phone could hear it.

So far, the trichord wedges are exerting equal pressure on the strings 
(plucking doesn't reveal any leaks or uneven damping) and the dampers 
follow when pressing on the strings. The technician who prepped the piano 
didn't notice a problem but who checks damper function on shift?

Anyone care to take a shot at it?

Tom Cole
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