---------------------- multipart/alternative attachment Hi Phil, Newton and all, > > Rattling around in my brain is the factoid (or perhaps it's an > >imaginoid) that at least one manufacturer (Boesendorfer is the >name > that comes to mind) deliberately notch their bridges so that >the edge > of the notch does not bisect the bridge pin hole (I >believe they cut > the notches deep, but even that is hazy in my >memory). > >> Phil F > >It is a misunderstoodoid. > >Beech (local hardwood) is softer than maple (our choice) so they k-notch >their bridges to bisect the pin. As the string sinks into the wood the >termination then becomes equal on the vertical and horizontal plain. What's a K-notch Newton? Are you referring to the notch with a small vertical drop immediately the notch leaves the bridge top, such as the early Bl=FCthners used. Fazioli started to use this technique around 1994. Is he still using it? B=F6sendorfer use European maple for their bridges (known as Sycamore in the UK - Acer pseudoplatanus). Sycamore has an ADD of around 0.6 gr/cc, while European Beech (Fagus sylvatica) has around 0.7 gr/cc , Rock maple (Acer saccharum) around 0.73 and Australian Antarctic Beech (Nothofagus Morrei) around 0.77gr/cc. I have seen enough bridge pins 'adrift' in Sycamore bridge caps to believe that it is a little light for such service. I'm recapping a couple of sections on a 20 year B=F6s 6'8" at present. Regards, Ron O. -- _______________________ OVERS PIANOS - SYDNEY Grand Piano Manufacturers Web: http://overspianos.com.au mailto:info@overspianos.com.au _______________________ ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/b0/a5/87/59/attachment.htm ---------------------- multipart/alternative attachment--
This PTG archive page provided courtesy of Moy Piano Service, LLC