This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment I used the Stanwood method. David Love ----- Original Message -----=20 From: Isaac OLEG SIMANOT=20 To: pianotech@ptg.org=20 Sent: February 15, 2002 2:50 PM Subject: RE: Unequal key ratios: puzzler David, How did you mesure the ratio ? By weighting or measure ? Thanks. Isaac -----Message d'origine----- De : owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]De la = part de David Love Envoy=E9 : vendredi 15 f=E9vrier 2002 16:31 =C0 : Pianotech Objet : Unequal key ratios: puzzler Recently rebuilt a S&S model S c 1931. The measured key ratios for = the sharps were .48, for the naturals .51. I considered moving the = capstans on the sharps so the total leverage on each would be equal. = But when I started to set up samples and take measurements, I found that = the FW pattern was smooth and the corresponding SWR's were equal. I = would have expected that sharps to need less FW or, with a smooth line = front weighting, a varied SWR. Somewhere in the system something else = compensated for the different key ratios. Question is where? All new = parts, strike weights smoothed, BW all equal. the job is now completed. = I left the capstan positions alone and the FW curve was pretty smooth, = SWR all 5.9 - 6.0. A few bumps along the road as is often the case, but = one would have expected 6-10 grams less FW on the sharps. Any opinions? David Love ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/27/6d/35/be/attachment.htm ---------------------- multipart/alternative attachment--
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