[CAUT] Upright geometry problem (Nordiska)

[David Ilvedson]

How does one reduce the damper spring tension evenly?    

David Ilvedson, RPT
Pacifica, CA  94044

----- Original message ----------------------------------------
From: "Richard Brekne" <ricb at pianostemmer.no>
To: caut at ptg.org
Received: 10/14/2007 11:59:41 PM
Subject: [CAUT]   Upright geometry problem (Nordiska)


>I run into this quite frequently, (blow reduced tho as you corrected 
>yourself)  The damper spring is well known as a source of this kind of 
>thing, but I get the sense that the jack return spring is less so.  It 
>can actually do the job on its own really IME.  Sometimes these things 
>are really strong... especially on cheap pianos. Its almost like the 
>manufacturers arent aware that the thing can be too strong.

>Cheers
>RicB




>    Hi Jim-

>    We found that the blow had been increased and the dip increased so
>    much in
>    an attempt to give aftertouch it wasn¹t getting due to the strong
>    damper,
>    hammer and jack springs. You just couldn¹t play hard enough to
>    overcome the
>    spring strength and get the jack to clear.

>    Just my 2 cents.

>    David
>    David C. Brown
>    Arizona State University
>    School of Music
>    Piano Technician
>    1-480-965-6760
>    david.c.brown.2 at asu.edu