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
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