I would be surprised if the area behind the aggraffe (hitch pin side) was the source of falseness. Unless the aggraffe itself had deteriorated (which it well might have) I don't think any small angle change resulting from some crushed wood would be the source of poor termination. The capo section might well be a source (see attached photo). David Love www.davidlovepianos.com -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Encore Pianos Sent: Thursday, October 25, 2012 4:20 PM To: pianotech at ptg.org Subject: Re: [pianotech] Bridge agraffes FYI I have a couple of these in my service presently here in New Hampshire, and have had others in the past. These bridges probably sounded pretty good in 1925 when they were new, but as they age, they can become insanely, incredibly false. This I would attribute to the deterioration of the bearing surface of the maple just behind the agraffe where the string presses into it. The strings literally crush the surface reducing the angle of deflection of the string as it exits the back of the agraffe, and an insecure termination and the falseness is the result. I have heard these problems on a number of these agraffed sohmers, mostly the (stupid) cupid grands. So I attribute that to a flaw of the design rather than an isolated incident. Living in New England, I am in a harsh environment for pianos with dry winters and humid summers, so perhaps I see more deterioration than you do, in your more benign environment. Will Truitt -------------- next part -------------- A non-text attachment was scrubbed... Name: 2012-10-25_10-33-35_298.jpg.jpg Type: image/jpeg Size: 88017 bytes Desc: not available URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20121025/7fe74e13/attachment-0001.jpg>
This PTG archive page provided courtesy of Moy Piano Service, LLC