Noisy Dampers on Shift

[Thomas Cole]

I've added your suggestions to the "things to try" list, even though I'm 
pretty sure that hammer alignment is quite good. Also shouldn't partial 
shift be the same as unshifted as far as damper effectiveness is concerned?

One out I do have is to just limit shift pedal travel.

Tom

David Love wrote:

> You've received many suggestions but have you checked to see whether 
> the shift on the offending notes is the same as the other notes?  In 
> other words, does the hammer on the offending notes shift off the 
> strings to the same degree as the others?  Also, does the same thing 
> happen when you only partially engage the una corda pedal so the shift 
> doesn't actually come off the left hand string?
>
>  
>
> David Love
> davidlovepianos at comcast.net
> www.davidlovepianos.com
>
> -----Original Message-----
> From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On 
> Behalf Of Thomas Cole
> Sent: Tuesday, July 15, 2008 9:55 PM
> To: Pianotech
> 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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