No Power Yamanamas

[Jon Ralinovsky]

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Hi Richard,
Check out the back rail - I've found many Yamahas that are not bedded 
because the keyframe is not contacting the dag blocks.  A piece of 
veneer on the keyframe will take care of the problem (thanks to Roger 
Jolly for the tip!).

Respectfully,
Jon


>I have looked at bedding several times on this one example I have at 
>the UiB. In the middle section there is defininatly a slight problem 
>and always has been. And no matter what I do it seems to stay. I 
>wrote on this a couple years back and we got into a discussion about 
>the hammer rail flexing.
>
>But bedding specific, the middle section displays some minor 
>tendancy for neighborhing hammers to jump a bit when a key is played 
>hard. Not very much mind you. The top two sections show none of 
>this. And the bass is quite solid as well, tho I have had to adjust 
>the bedding on occasion to assure that.
>
>Yet the uneveness of that description does not match the eveness of 
>this lack of power sensation. That is evident over then entire 
>keyboard, and if it is more pronounced anywhere, it would be in the 
>two top sections me thinks. It does not seem like the proximity of 
>action brackets has any affect.
>
>The bedding question is a logical place to look, as is the hammer 
>rail flexing thing to be sure. Thats part of what makes me scratch 
>my head on this one. Those things seem well within acceptable 
>tolerances.
>
>RicB
>
>Marcel Carey wrote:
>
>>  Hi RicEven if everything has been checked and rechecked, could the 
>>keybedding be at fault? Check the keybedding with the pedals 
>>depressed (the keybed sometimes flex enough to change the bedding). 
>>Either that or the hammer rail is bending. Is that sensation the 
>>same all over the keyboard, or more concentrated to areas between 
>>the action's brackets? Just other thoughts, Marcel Carey, 
>>Sherbrooke, QC
>>
>
>
>
>
>--
>Richard Brekne
>RPT, N.P.T.F.
>UiB, Bergen, Norway
><mailto:rbrekne@broadpark.no>mailto:rbrekne@broadpark.no
><http://home.broadpark.no/~rbrekne/ricmain.html>http://home.broadpark.no/~rbrekne/ricmain.html
>


-- 
Jon Ralinovsky
Piano Technician
Department of Music
Miami University
513/529-6548
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