This is a multi-part message in MIME format. ---------------------- multipart/mixed attachment Mark. This action has got some problems... :) First as the your measurements below show, you have some rather erratic ratio numbers, with what appears to be a different ratio in the bass and upper treble then in the middle of the piano. Cant really picture right off what might be causing this if the key ratio is a clean 0.52. Definantly take a good look at your knuckles, but I have yet to run into a set that would result in these kinds of measurements. You say your knuckle line is quite uneven so you definantly want to straighten that out. Part of this might be some regulation issues, as that is clearly off spec. Steinway Hamburg specifies key dip of 9.5 +/- and I cant think NYS goes over 10.0 Your 10.7 mm key dip, along with 46 mm blow shows a problem as well.. either you have lots an lots of aftertouch or something doesnt seem quite right here. Ratio of roughly 6.0, deep dip, and 46 mm blow equates to a lot of aftertouch under normal conditions. SW's are generally heavy for your Ratio(s) so you are going to want to change one or the other of them.. or perhaps both. Perhaps the least resistance route would be to accept and insure a 6.0 ratio over the entire paino, and go with a Mid Medium or even 3/4 Mediuem SW curve. You should end up with being able to get 38 BW here with no real troubles. I'd highly recommend finding a certified Stanwood fellow/gal to straighten all this out for you. They can also help you decide if another configuration is advisable, but if its in the home, a medium range SW curve is probably a good call. Cheers RicB RicB Mark Davidson wrote: > Key ratio is quite consistently near .52 (.507 to .525 on the ones I > measured, average .517) > No evidence of any intent to graduate from bass to treble, etc. > > Capstan line appears to be quite straight (checked with straight edge) > > Wippen weight measured at cushion is about 15.5g (15.4 to 16.0 on the ones I > measured, average 15.5) > > Key dip .45"/11.4mm > > Blow distance 1.80"/46mm > > 17mm knuckles, but these are not particularly straight. Flipped up hammers > and checked with straight edge and > saw as much as 1mm obvious difference between adjacent knuckles (checked the > letoff side). Definitely not as straight > as capstans. > -- Richard Brekne RPT, N.P.T.F. UiB, Bergen, Norway mailto:rbrekne@broadpark.no http://home.broadpark.no/~rbrekne/ricmain.html http://www.hf.uib.no/grieg/personer/cv_RB.html ---------------------- multipart/mixed attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/f8/7e/54/94/Mark.htm ---------------------- multipart/mixed attachment--
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