An odd situation

[Richard Brekne]

You know Dale... seeings how this is a Yamaha... I didnt stop to think 
to check a few of the things you mention below. But you did hit on 
something I didnt mention... tho I didnt measure it, I did get the 
impression this was a bit heavier then usual Yamaha.  Couldnt be 
centerpin friction tho... as these are newly protek't and nice and 
free... too free for my likeing.. grin.. but thats another story.

I'll look at some of these basic <<Stanwood>> parameters next time I go 
down in a couple weeks... off list Jon Page also suggested I double 
check to see if anyone has dinked around with shimming the stack.

46 mm blow is the figure we were given at the Acadamy.  47 was said to 
be like.... ok if you wanted to get less aftertouch... 48 was supposed 
to be no no...

But what suprised me was that I couldnt adjust to 50 mm... not that I 
should want to... but there is supposed to be around 5 mm between the 
shank and rest cushion.

Cheers and thanks for the thoughts
RicB






Erwinspiano@aol.com wrote:

> In a message dated 9/5/2004 1:33:55 PM Pacific Standard Time, 
> Richard.Brekne@grieg.uib.no writes:
>   Ric
>   Good analysis. The short answer is your leverage is too good.
>    Now I thought 48 mmm was standard spec for blow on most of Yamaha 
> grands. I would set letoff closer as you did to consume some 
> dip/aftertouch.   
>    Beyond this I suspect capstan placement could be too far back or 
> perhaps a slight adjustment of the action spread would change the 
> action key ratio enough to bring it back into tolerance. This is 
> fairly unusual for Yamaha. With all their jigs & fixtures to assure 
> uniformity action to action. This is odd.
>    I don't like actions set up this way as the overall touch weight 
> usual ends up heavy as is the typical problem with Baldwin.
>  Are the knuckles perhaps to close to the center pin? This would also 
> contribute to the problem. It could be one or more contributing 
> factors but with Yamaha a compounding series of errors would be 
> likely, Don't you think?
>  Dale
>
>     So... in the end.. I had 48+ mm blow, standard Yamaha spec letoff and
>     drop, 10 mm dip,  64 mm key height and too much aftertouch with no
>     real
>     way of getting less.  Ok.. I could have fudged a bit on let off...
>     but a
>     few tests didnt really get me where I wanted... I would have had
>     to go
>     with about 2 mm in the bass... 1 mm in the treble, and a 9.5 key
>     dip to
>     get the aftertouch down to where I usually like it... which is by no
>     means too little.
>
>     Anyone got an idea as to what could be wrong here ??
>
>     Cheer
>     RicB
>
>