[pianotech] Pearl River Upright

[Tom Driscoll]

Subject: [pianotech] Pearl River Upright
Matthew,
 More details  please,
     Upright with capstans not dowels ? 42" , 45"  50" piano?
Whan you say adjusted letoff, you had to have INCREASED letoff. That is an 
inportant fact. You may have treated the symptom by introducing excessive 
letoff instead of fixing the problem.
Solid hammer travel? What does that mean ? Lost motion correction is what 
the capstan regulates. Insufficiant after touch which is a result of the 
combination of Blow, key dip, lost motion and letoff adjustment may be the 
answer.. You want the answer when what you need is an understanding of the 
concept. Check the archives on Yamaha double strike. This was recently and 
often discussed. Too strong damper springs can be a cause also .
 Gotta go,
best wishes,
Tom Driscoll

> Went to tune a Pearl River upright yesterday.
>
> After I finished, the client pointed out the double strike issue, when he 
> would play softly. Sure enough, there is the bobbling hammer issue.
>
> I took my let off tool and adjusted let off on a few sample notes, and 
> that got rid of the double strike sound. However, as I observed the hammer 
> as I continued to play softly, the hammer wanted to double strike. 
> Apparently it was bobbling on the jack.
>
> Like I said, I got rid of the annoying double strike by adjusting the let 
> off. Would adjusting the capstans create solid hammer travel and rid the 
> bobbling to and fro?
>
> Which brings up another point. My capstan wrench does not fit on the Pearl 
> River capstans. Do I need to order a specialized one from the company?
>
> Thank you for the help,
> Matthew


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