[pianotech] Hammer strike line. Was-----Yamaha Hammer Suggestion

[PAULREVENKOJONES at aol.com]

All worthwhile considerations. Yet it is striking, no pun intended, as has  
been pointed out, that RC&S boards seem to need less hammer  movement.  
 
P
 
 
In a message dated 2/7/2010 7:54:56 P.M. Central Standard Time,  
surfdog at metrocast.net writes:

 
Whether  or not it is a  CC board or R, C, & S or whatever, killer octave 
or  no, WHY does the strike point deviation improve the  tone? 
I  don’t know the answer, but I have also wondered it if it is related to 
the  vagaries of the plate casting, particulary the string height.  The 
string  height is not always even or  tapers evenly along its length within a  
section.  The inconsistencies can be measured, and are often visible to  the 
naked eye.  Also, there is no guarantee that the v bar consistently  ends up 
in the same place fore and aft from plate to plate after being shaped,  and 
in relation to other sections within a plate.  And the profile itself  can 
vary widely in shape. 
Will 
 
 
From:  pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On 
Behalf Of  PAULREVENKOJONES at aol.com
Sent: Sunday, February 07, 2010 8:27  PM
To: pianotech at ptg.org
Subject: Re: [pianotech] Hammer  strike line. Was-----Yamaha Hammer  
Suggestion

 
That's  the interesting question. And that was my point. Thanks,  David.
 

 
Paul
 

 
 
In a  message dated 2/7/2010 7:18:23 P.M. Central Standard Time,  
davidlovepianos at comcast.net writes:

I've  found the same thing.  Strike line deviation being necessary  on
original boards but when I replace the board on the same piano with a  RC&S
board the strike line seems to straighten out, or the curve  becomes
unnecessary.  What's that about?  

David  Love
www.davidlovepianos.com

-----Original Message-----
From:  pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On 
Behalf
Of  Ron Nossaman
Sent: Sunday, February 07, 2010 3:31 PM
To:  pianotech at ptg.org
Subject: Re: [pianotech] Hammer strike line.  Was-----Yamaha Hammer
Suggestion

William Truitt wrote:
> I  too have staggered the strike line on Steinway grands and other pianos 
 
> to find the sweet spot and get the best tone.  So let's ask  the question 
> of the why of that - what is going on in the plate and  string interface 
> in relation to the action that requires something  other than a straight 
> line to achieve the best tone?  


Look at where the farthest deviation from a straight line is.  
Gee, that looks like the most universally problematic part of  
Steinway, and other largely panel supported crown, scales. How 
can  there possibly be tonal problems in the killer octave? 
Must be the plate  casting.

As I periodically repeat, I find this phenomenon to not be  
obvious in low compression and adequately supported RC&S  
systems. I still check now and then, but find the difference, 
if I  can detect any at all, to not be worth the trouble to 
deviate from the  straight line on a new RC&S board. On an 
original board, it's likely  obvious enough to be worth the 
trouble.

I think it's primarily  the soundboard.
Ron  N


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