[pianotech] Interesting action on Yamaha YUA

Ryan Sowers tunerryan at gmail.com
Tue Jul 7 16:12:57 MDT 2009


It does have a very light touch. I just took some downweight measurements
and it's around 43-45 grams. Upweight is around 23 grams so the friction is
around 10. I'm contemplating adding some weight at the back of the keys but
I kind of like how it plays. If somebody is looking for a light action this
would be the one.

Alex: I don't understand your analogy to the grand action and feeling of
lack of gravity. When you refer to spring tension being neglibible, do you
mean the hammer return spring or the jack spring?

On Tue, Jul 7, 2009 at 10:49 AM, Alexander Lass <lasspiano at gmail.com> wrote:

> Ed,
>
> This is the first question that came to mind when I saw the design.  To
> make it analogous to a grand action, I think the feeling would be similar to
> not having any gravity acting upon the hammer assembly until the point of
> let-off.  Perhaps the spring tension is such that any sensation is
> negligible, but it does pose an interesting question.
>
> Ryan, any thoughts?
>
> Alex
>
> On Mon, Jul 6, 2009 at 9:38 PM, Ed Sutton <ed440 at mindspring.com> wrote:
>
>>  Ryan-
>>
>> What is the effect on pianissimo playing?
>>
>> Ed Sutton
>>
>


-- 
Ryan Sowers, RPT
Puget Sound Chapter
Olympia, WA
www.pianova.net
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