No Power Yamaha revisited

[Richard Brekne]

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Roger, Ed, and Ron

Ron Koval wrote:

> Cool clue, ric!

Grin... you liked that one eh ?  The other one I was going to give was

     If you block the hammer from rising and put pressure on the key the
     neighboring hammers all drop significantly.

>
> So it seems that the bedding must be good if you don't get the same symptom
> with the hammer out of the equation.....

I''ve checked and rechecked the bedding on this instrument 5 or 6 times. Darned
things been driving me crazy :) Dags hold the back rail firm, front rail is as
flat as you ever could want.... no.. its not the bedding.


> So, my guess would have to be an
> over-flexable hammer rail, if you get movement of key neighbors with the
> hammer in the mix.

Thats my guess as well, and you can see the thing bending. I checked on some
other pianos and found that a Young Chang does nearly the same when you hold the
hammer down... a bit stiffer tho... and it doesnt have the same problem with
play. A Bohemia and my giant Petrof dont respond this way at all. Hold the
hammer in place and press the key and all is dead stable... sigh.. and just when
I was beginning to hate Petrofs again.. :)

Question is... assuming its the hammer rail... what to do about it ? Any good
suggestions ?

> Or, does the hammer provide enough resistance to make
> the balance rail move?  I guess it would depend if the neighbor hammers move
> up, or down on strong blows.

Well.. you cant see that on a hard blow...happens too fast...all you see is lots
of movment. But blocking the hammer and pressing the key seems to be the
giveaway.. or what ?

> Ron Koval
>
>

Cheers

RicB

--
Richard Brekne
RPT, N.P.T.F.
UiB, Bergen, Norway
mailto:rbrekne@broadpark.no
http://home.broadpark.no/~rbrekne/ricmain.html
http://www.hf.uib.no/grieg/personer/cv_RB.html


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