[pianotech] Yamaha Uprights

[Dale Erwin]

My observation is that a damper spring, upright or grand, only needs enough tension/pressure to insure shut-off. Beyond that  we aren't depending on it to adjust touch weight. The damper resistance should be minimal.


Dale Erwin R.P.T.

----
From: David Love <davidlovepianos at comcast.net>


In the course of playing any experienced pianist will use any number of
touches, shallow, deep, hard, soft etc...  It's our job to insure that the
piano functions with all types of playing.  It's not the pianists job to
compensate for what we feel we don't want to deal with.  It's the height of
hubris to think otherwise.  The hammer shouldn't bobble if the action is
adjusted properly, that includes, in an upright, the damper spring tension.


The main issue in an upright that can't be separated out is the lack of a
repetition spring and the need to raise the key closer to its full height
before it will repeat reliably.  Of course, you can always get Darrel
Fandrich to build you an upright action that has a repetition spring.  

David Love
www.davidlovepianos.com


-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Ron Nossaman
Sent: Sunday, December 02, 2012 9:35 AM
To: pianotech at ptg.org
Subject: Re: [pianotech] Yamaha Uprights

On 12/2/2012 11:18 AM, Dale Erwin wrote:
> No, there isn't. In the Yamahas I spoke of, contact of the jack tail 
> to the letoff button can, unless it's changed in the last five or so 
> years, be clearly felt as an increased resistance. This is after the 
> damper has lifted, and in a piano in good regulation.
>
> Ron N
>
> Ron--I find that part you cite as less objectionable once the damper
spring tension is lessened.
>
> Dale

So I'm told. The typical scenario I saw was that the old dead Gulbransen
spinet had been traded in for a new Yamaha console so little Sally, and/or
Mom could start lessons. So they segued from a pianoid keyboard that offered
nearly no resistance anywhere in the stroke to one that did, and they didn't
understand the difference. I've seen this a dozen times at least, and my
experience has been that it isn't necessary to change the damper spring
tension once the problem is explained and the student becomes familiar with
and used to the piano.
Ron N


 
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