[pianotech] Bridge agraffes FYI

[tnrwim at aol.com]

I sold a Sohmer like this, and had a few clients who had them, also. The sound, to me, was not as full as a piano with a regular bridge. It was subdued, held back. The best way I can describe it is a horse wanting to go to a full gallop, but being restrained by the rider. Other than that, they were nice instruments. 

Wim

  


 



-----Original Message-----
From: David Love <davidlovepianos at comcast.net>
To: pianotech <pianotech at ptg.org>
Sent: Thu, Oct 25, 2012 9:57 am
Subject: [pianotech] Bridge agraffes FYI


  
Attached are two photos of a Sohmer Grand bridge with bridge agraffes.  Very
interesting in that the string bears on the top of the aggraffe hole, not on
the bottom as one might expect.  In order to maintain positive downbearing
on the bridge, the bridge has a raised shelf behind the aggraffe such that
the string runs uphill to the bridge from the hitch pin area before running
downhill to the aggraffe from the short span off the front of the shelf.
The slope of the string then rises as you move toward the tuning pin
termination side.  Sadly, I did not have my bubble gauge to try and
determine the net bearing and it's definitely got me reaching for the fish
oil capsules thinking about whether a measurement of the relationship
between the hitch segment and the front segment would reveal the net bearing
anyway.  The piano sounded like caca, btw, but there were other issues.  In
spite of that, the tone was surprisingly focused.  

David Love

 

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