---------------------- multipart/alternative attachment The overpull on the RCT is set according to a curve for every note on the scale, from as little as 12% in most of the bass to as much as 38% in some parts of the treble, with a major transition between the wound and plain strings. Furthermore, RCT computes a trailing average of six notes, which is calculated into the overpull percentage for each note, so that anomalies do not skew the figure. The percentages can also be tweaked for the technician's individual tuning style. The result is that pitch raises of up to 20 cents rarely require more than touchup, and up to ten cents not even that. If there is a risk of string breakage, I often use the fine tune mode to get it close to pitch without overpull, then use the pitch raise mode as a final tuning. Paul S. Larudee DGPEAKE@AOL.COM wrote: > In a message dated 12/2/00 12:23:06 PM Pacific Standard Time, > larudee@pacbell.net writes: > > > >> >> >> Agreed, but there is a big difference between having no problem and >> having >> a pitch raise so accurate that all it needs is a little touchup. >> Paul S. >> Larudee >> Richmond, CA DGPEAKE@AOL.COM wrote: >> >> > I believe the overpull is 25% of the 2nd partial. Someone please >> > correct >> > me >> > if I am wrong. (Jim, please pitch in). The SAT 3 is the same. I >> > usually >> > measure the lowest note of the plain wire, offset for pitch raise, >> > and >> > re-measure every octave or so. I have no problems with doing a >> > pitch raise >> > >> > using this method. Dave Peake, RPT >> > Portland Chapter >> > Oregon City, OR >> > www.davespianoworks.locality.com >> > > Really? 100% of the time? Yes, sometimes it is so close that I hardly > move > the pins. Other times it is still a little flat or a little sharp. > > Dave Peake, RPT > Portland Chapter > Oregon City, OR > www.davespianoworks.locality.com ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/df/55/82/e9/attachment.htm ---------------------- multipart/alternative attachment--
This PTG archive page provided courtesy of Moy Piano Service, LLC