This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Anyone willing/able to state the ABCs of logarithmic and/or = semi-logarithmic piano string scaling? What kind of scaling is Ron N, = and Del using? I'm remember the difference between graphing on log-log = paper and semi-log paper, but fail to envision how this specifically = relates to piano string scaling. Is it always one way or the other - or = can one design a log-log string scale OR a semi-log scale? Exactly what = factor(s) make the logarithmic progression(s)? Which make linear = progression(s)? I know sometimes in Del's scale designs, he will have = the long bridge (some factor of it) follow the semi-logarithmic = progression (or is it logarithmic?), but then he will abandon that on = the bass bridge - I think because of physical limitations of the = soundboard/plate, etc. - what's that all about? What are some of the = ramifications of all that? If many manufacturers don't follow a log or semi-log progression on = their long bridges, what do they follow? (Watch out, there may be some = worms in that can!) I have to admit, I know very little about piano string scaling. Can = anyone recommend some reading that would help with these types of = questions? Thanks. Terry Farrell ----- Original Message -----=20 I had the rare occasion to step into my ex's house last night as I was = picking up my son. She has a Schiedmayer 180 that seldom gets played. I reported on this piano a couple of years ago, after it had rested in = it's current location for a couple of years. At that time, after a move = of 150 miles from a dry climate to a more humid one, it had held pitch = and tune remarkably well, despite not having been tuned for two years or = so. Two years later, same thing. All the As from 2 to 5 are within 2 = cents of correct pitch. 6 and 7 are slightly sharp, 0 and 1 slightly = flat. The tuning--well, it isn't horrible. The unisons are holding = surprisingly well, in fact. =20 Last time I posted on this, Ron O. commented that the stability was = due in large part to the logarithmic bridge. Being clueless in this = department, I'm curious how this would make a difference. =20 I didn't have time or nerve to delve into parts removal, but I was = wondering whether the pinblocks are configured differently than Kawai = grands.=20 Dave Stahl ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/59/5f/75/f2/attachment.htm ---------------------- multipart/alternative attachment--
This PTG archive page provided courtesy of Moy Piano Service, LLC