[pianotech] Mysterious Key Noise

[David Ilvedson]

I agree.   We are talking one key, if you absolutely can't see what is going on back there, remove a few parts and reinstall the action.   It seems to me, the key should show some marks where it is hitting something.   

David Ilvedson, RPT
Pacifica, CA  94044

----- Original message ----------------------------------------
From: Kerry <kerrykean at att.net>
To: pianotech at ptg.org
Received: 10/28/2009 6:53:41 AM
Subject: Re: [pianotech] Mysterious Key Noise


>That addresses the symptom, not the problem. If it is the keyend hitting the
>tray, which seems likely, you need to find out why and fix it. Is the tray
>warped or moving for some reason? If the end of the key sticks out too far,
>it's easy to remove some wood but maybe it's a pulley key (enlarged balance
>pin hole) that slides back far enough to contact the tray.  

>Kerry Kean
>www.ohiopianotuner.com


>-----Original Message-----
>From: William Truitt [mailto:surfdog at metrocast.net] 
>Sent: Wednesday, October 28, 2009 5:48 AM
>To: pianotech at ptg.org
>Subject: Re: [pianotech] Mysterious Key Noise

>And if you remove the cheek blocks and then slide the action out a smidgen,
>the noise should go away if the key is hitting the tray.  If you are lucky,
>this piano will have an adjustable cheekblock that will allow you to
>position the action far enough out to eliminate the noise.

>Will Truitt

>-----Original Message-----
>From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
>Of Ron Nossaman
>Sent: Wednesday, October 28, 2009 12:35 AM
>To: pianotech at ptg.org
>Subject: Re: [pianotech] Mysterious Key Noise

>Patrick C. Poulson wrote:
>> 
>> Greetings: I am working on a grand piano that has a noise coming from C2 
>> that is eluding me. The symptom is a knocking that occurs on the 
>> downstroke. The noise disappears when the sustain pedal is depressed, 
>> but still present when the C2 damper is lifted individually. I initially
>> thought it was the key end felt, but the fact that the noise remained 
>> when I lifted the damper manually excluded that as the source. 

>Right, and it also excluded damper leads, flanges, springs, 
>and up stop rail for similar reasons. It also excludes the 
>wippen, since the noise disappears with the pedal depressed, 
>but not with the damper lifted. What's left is what Dave 
>Porritt suggested as the likely cause. The key end hitting the 
>damper tray.

>Ron N