duplex position

[David Love]

Generally, you don't have that much room to play around with these.  If you
are tuning them then you need to hit some whole number relationship.  If
not, then the farther back you can push them (toward the hitch pins) the
better, keeping in mind that the bearing will change depending on where they
end up.  Tuning aside, I find that Steinways usually don't have a long
enough backscale.  The shorter the backscale, the lighter the bearing needs
to be and sometimes those two requirements can be at odds, especially when a
compression style board is asking for more bearing to get things stiff
enough which ends up just tying down the bridge because of the short
backscale and around and around.  Choose your poison.   

 

David Love
davidlovepianos at comcast.net
www.davidlovepianos.com 

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of David Ilvedson
Sent: Thursday, January 03, 2008 8:59 AM
To: pianotech at ptg.org
Subject: Re: duplex position

 

 

So half the speaking length...

David Ilvedson, RPT
Pacifica, CA 94044

  _____  

Original message
From: Erwinspiano at aol.com
To: pianotech at ptg.org
Received: 1/3/2008 2:30:47 AM
Subject: Re: duplex position




  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.

 

 





  _____  

See AOL's top
<http://food.aol.com/top-rated-recipes?NCID=aoltop00030000000004>  rated
recipes and easy
<http://body.aol.com/fitness/winter-exercise?NCID=aoltop00030000000003>
ways to stay in shape for winter. 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20080103/c467b455/attachment.html