duplex position

[Erwinspiano at aol.com]

Hi Frank
  Although you are correct about this for many pianos, the Steinway  B's rear 
duplex string length doesn't follow this. it's an octave higher
  Dale
 
 
David, et al,

I cannot speak to the specific make, model, and era  of your piano, but 
typical of pianos with this type of duplexer, the  distance from the back bridge 
pin to the duplexer at note 88 is equal to the  speaking length.    One can go a 
step further, and after  stringing, nudge the duplexer in or out, to "tune" 
the duplex length to sound in  unison with the speaking length at note 88.  
Whether one believes that  "tuning" the duplexer is effective, it was probably 
the design intent, if you  find that the original position of the duplexer 
suggests this relationship  between the duplex length and the speaking length.


 



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