Yamaha Jack issue

[Greg Newell]

Avery,

                Perhaps you’re right. I thought I remember reading it about
Yammy’s too.

 

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 Avery Todd
Sent: Thursday, March 20, 2008 11:51 PM
To: Pianotech List
Subject: Re: Yamaha Jack issue

 

I've never heard of that on Yamaha's. I "think" it was Samick that had that
problem. 

 

Avery Todd

Houston, TX 

On Wed, Mar 19, 2008 at 10:34 PM, Greg Newell <gnewell at ameritech.net> wrote:

Steve,

                Are you sure this isn't 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 <http://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

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