[CAUT] Upright geometry problem (Nordiska)

[Barbara Richmond]

David,

After doing or finding a test note, I've taken the action out and worked 
from the back, pushing the springs an even amount "out" (towards the keys). 
Then I test for evenness of tension by pushing on the top of the levers.

Are you asking if there is a way to use a gram gauge?  I just got a 100 gram 
gauge, but I don't have a vertical piano around to see how it would work.

-Back down to the tarpits and smoothing out some wacky backchecks.

Barbara Richmond, RPT
near Peoria, Illinois


 (----- Original Message ----- 
From: "David Ilvedson" <ilvey at sbcglobal.net>
To: <caut at ptg.org>
Sent: Monday, October 15, 2007 1:30 AM
Subject: Re: [CAUT] Upright geometry problem (Nordiska)


> 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