No Power Yamaha revisited

Richard Brekne Richard.Brekne@grieg.uib.no
Wed, 14 May 2003 09:35:34 +0200


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Roger Jolly wrote:

> At 09:33 PM 5/13/2003 +0200, you wrote:
>
>> 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.
>>
>
> Sounds like the balance rail is rolling.   Check to see that it is
> well secured to the cross slats. check to see if the slats flex. If
> the mortice cut has been badly done made. It may be the cause of the
> problem.

Interesting...   why would this cause flexing in the hammer rail only
when  key pressure puts heavy presure on the hammershank ?..  I will
look tho today.

>
>
>
>
>> >
>> > 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.
>
>
> The movement has to be balance rail related, unless the frame is
> riding on the top of the unacorda arm.
> Gee I would love to see this piano.

Having a hard time visualising this.  Why cant the hammer rail be just
plain too flexible ? Believe me I would love to avoid putting in a new
one.


> Regards Roger
>

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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