Isaac; Your soultions are always correct, but how much are 2 kopeks worth? Carlos Ralon, RPT ----- Original Message ----- From: "Isaac Sadigursky" <irs.pianos at earthlink.net> To: <pianotech at ptg.org> Sent: Sunday, February 14, 2010 6:37 PM Subject: Re: [pianotech] More on Yamaha Sticking C6 Key Problem > Hi,Robert! > I had watched this thread and here are my 2 kopeks: > I would suspect "Reversed Pinning" situation:The Jack Center Pin > rotates in the Bird Eye and is too tight in the bushing.. > Re-pinning will take care of it. > During repetitious playing the Center Pin heats-up and becomes too > tight,when it cools-off-things are normal ,again.In that condition the > center pin passes any test.. > > When your technician will do re-pinning,do the following; > Upon removing the Center pin from the Jack,MEASURE the Pin > 2]Select exactly the SAME SIZE Center pin and if you can push it > inside the Jacks Bird Eye with your finger nail-it means it's rotating > there..You must go to next 1/2 size larger Center Pin > 3]Try to push that Original Pin in the Felt Bushing and it > will ,probably,be TOO TIGHT > I had found that "Reverse Pinning" in many brand new parts.. > I hope,I made myself clear on that. > Good Luck! > isaac Sadigursky, RPT. > Los Angeles Chaper.. > On Feb 14, 2010, at 2:52 PM, <rsfinley at charter.net> wrote: > >> Here are some more observations on the intermittent problem with the >> C6 on my Yamaha G1 Piano. >> >> When I play the key the first time, the note usually sounds, but if >> I play repeatedly and quickly after that, it stops sounding. I have >> to wait a few seconds after that for the key to recover, before it >> will play again. It seems there is a delay of a few seconds when >> part of the action is slowly getting back into the position when the >> key can be played. I am puzzled why there is this delay. >> >> When I take the action out and put it on a table, I cannot reproduce >> the sticking key effect for C6, even if I simulate the presence of >> the string using a hard book held some distance above the hammer (of >> course the hammer will not rebound in the same way as for a string). >> I can cause the hammer to move in fast repetition without any >> blocking effect. The sticking key effect only occurs when the action >> is back in the piano. Although I doubt it, I am wondering if this >> is a combined effect of the damper and the action causing this >> sluggish operation, although the damper for C6 seems to be working >> fine. >> >> When I look at action for C6 (difficult to see everything due to the >> proximity of the actions of the other keys, everything appears to be >> intact. I haven't removed the whippen assembly for C6 yet to >> examine it in detail. Maybe I should do that. >> >> Could anyone throw more light on this? Thanks for your advice. >> >> Robert > > >
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