[pianotech] Advice about intermittent note on Yamaha grand

[David Ilvedson]

Pianoworld loves answering pianist questions...

David Ilvedson
Pacifica, CA

On Feb 13, 2010, at 2:29 PM, John Dever <jazzman3743 at live.com> wrote:

I guess you never quite know who you are talking to. Assumptions are a funny thing...
 
I am not a tech but read this site every day (several times a day). It is interesting that from time to time some "techs" can get fairly dismissive towards those that ask questions. 
 
It is impressive to me that quite a few piano players seek to find out what makes their particular piano tick and are willing to ask the required questions. Of course that puts them out there and open to criticism - often unwarranted.
 
Sometimes patience with the layman that are working through their particular problem is in order. Not everyone knows what seasoned techs know. Of course that's why they are on this forum asking their questions...
 
JD
 

 
> From: davidlovepianos at comcast.net
> To: pianotech at ptg.org
> Date: Sat, 13 Feb 2010 13:55:51 -0800
> Subject: Re: [pianotech] Advice about intermittent note on Yamaha grand
> 
> Robert:
> 
> As you can see a note not repeating could be several different things from a
> weak repetition spring to a poorly aligned jack, a poorly regulated
> balancier, tight jack center. First the note needs to have the regulation
> checked completely. If you are not a tech and can't do that then best to
> hire someone and ask them what they did. Over time you'll learn what to do
> on your own. 
> 
> David Love
> www.davidlovepianos.com
> 
> 
> -----Original Message-----
> From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
> Of Dean May
> Sent: Saturday, February 13, 2010 11:39 AM
> To: pianotech at ptg.org
> Subject: Re: [pianotech] Advice about intermittent note on Yamaha grand
> 
> Hi Robert
> 
> It sounds to me like there is a friction problem in one of the action
> centers, likely the jack center. If you depress the heel of the jack, make
> sure it is resetting quickly to a rest position similar to the other jacks.
> If it is a little slow then there's your problem. 
> 
> Dean
> 
> Dean W May (812) 235-5272
> 
> PianoRebuilders.com (888) DEAN-MAY
> 
> Terre Haute IN 47802
> 
> 
> -----Original Message-----
> From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
> Of rsfinley at charter.net
> Sent: Saturday, February 13, 2010 1:58 PM
> To: pianotech at ptg.org
> Subject: [pianotech] Advice about intermittent note on Yamaha grand
> 
> I have been having a problem with one of the keys, C6, on my Yamaha baby
> grand piano. The note sometmes sounds and sometimes doesn't. If I play the
> note repeatedly, quickly, it sometimes stops sounding. If I give it a rest
> and then play it, it usually sounds again. When it stops sounding, the
> hammer is not propelled as far as the string. 
> 
> I took the action out to inspect it and to compare it with the action of the
> surrounding keys. It seems that when the note is played, the tip of the jack
> doesn't protrude through the slot in the repetition lever as much as for the
> other keys. I guess the tip of the jack has to stick through the slot a
> certain amount to engage the hammer knuckle, in order to thrust the hammer
> towards the string, and it is just on the point of not being far through
> enough. 
> 
> Please could you suggest what the solution might be? If I turn the Letoff
> regulating screw so that the letoff button is lower, I think it might cause
> the tip of the jack to stick through the slot in the repetition a a little
> further because the jack toe will engage the letoff button punching across a
> shorter distance than before, making it more certain that the note will
> sound. Would this be the correct thing to adjust or is there another
> alternative? (I didn't examine the knuckle to see if it is worn or if there
> is a deep groove in it. It seemed to be OK)
> 
> Thank you very much for your help. 
> 
> Robert Finley
> 

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