---------------------- multipart/alternative attachment Ric My first post was incomplete please see other. Interesting post. were the= =20 boards in or out of the piano/ I presumne in? If in then how did the=20 accomplish thinning? Thanks--Dale Apprapoe freeing up the edges of the board Dale, One of the segements of Steingr=E6bers lecture in Helsinki this past weekend was about this. He showed a few pictures of how they go about this at their factory and breifly discussed some of the goals in their proceedure.=20 They spread dark sand on the panel and then pound a bit on the bridge to see where the sand settles. They remove material from the soundboard until the sand accumulates in a very clearly defined thin boarder line about the edges of the entire soundboard. They are particularily concerned with the K point area which corresponds to the area in the treble where the so called killer octave phenomena occurs. But all around the edge of the soundboard they want a precisely defined line of sand.=20 Tho he didnt mention it, the pictures also revealed an accumulation of a line of sand just at the leading edge of the bridge as well. I didnt get a chance to ask him if that was done on purpose or not. Cheers RicB ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/37/10/8f/9f/attachment.htm ---------------------- multipart/alternative attachment--
This PTG archive page provided courtesy of Moy Piano Service, LLC