Steve, Are you sure this isnt a center pin plating issue? I recall reading somewhere that the plating comes loose and binds in the action center. The more you play it the worse it gets until you stop for a while. Greg Newell Greg's Piano Forté www.gregspianoforte.com 216-226-3791 (office) 216-470-8634 (mobile) From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Steve Blasyak Sent: Wednesday, March 19, 2008 12:29 PM To: pianotech at ptg.org Subject: Yamaha Jack issue Terry, I had the same problem with an M 500 a couple of weeks ago. I have had similar problems/ issues with consoles or uprights in the past usually in the high treble were the hammers are lighter. I always considered this a key weighting issue. This particular instance was at B 1. Checked all friction, whippen, jack and hammer. All good, in fact if anything they were pinned too loose. Tried more lost motion, lubricated jack, teflon on butt leather. Increased key dip. Increased jack spring tension. Nothing worked. Well in the end, with the damper pedal depressed and rapidly playing the note it would fail after about twenty repetitions. Under normal playing, if the jack failed to return under the hammer butt, as soon as you release the damper pedal the jack would slip back under the hammer butt. So I told the client "that's as good as it gets", and called it a day. Driving away, I tried to rationalize that it was an unexplained phenomenon. I could not escape the feeling of failure to solve the problem. One thing that was mentioned by someone I can't remember who. What would the key bed have to do with this phenomenon? Steve Blasyak Orange County Ca. Pura Vida _____ Need to know the score, the latest news, or you need your Hotmail®-get your "fix". Check it out. <http://www.msnmobilefix.com/Default.aspx> -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20080319/acf6d853/attachment.html
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