Re. Bobbling hammers on Yamaha upright

Isaac OLEG oleg-i@noos.fr
Fri, 23 Apr 2004 22:41:26 +0200


Hello,

Thanks for remembering this. Checking the key height stay the most
important point in any regulation in the end, grand OR vertical.

I believe it is because the "magic line" is more sensitive on
verticals, depending of the height of the capstans, key level a little
low means a lot of trouble then.

I guess you where not only talking of the lack of key dip because of
the keybed sag.

Best regards.

Isaac OLEG


-----Message d'origine-----
De : caut-bounces@ptg.org [mailto:caut-bounces@ptg.org]De la part de
Ray
Diederichsen
Envoyé : vendredi 23 avril 2004 22:25
À : College and University Technicians
Objet : Re: Re. Bobbling hammers on Yamaha upright


We have had some bobbling hammers on almost brand new Yamaha U5s
(and some older ones, too) here at University of Nevada, Reno. Check
your key dip. A couple of appropriately placed business cards under
the
balance rail might fix things up real fast. Seems the key beds start
to sag
just enough to give trouble soon as the piano drys out. Try it, you'll
like
it.

Ray Diederichsen
University of Nevada, Reno


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