If the problem was the back scale, then why have I never had this problem with all the other Steinways I've restrung? Is there that much difference in the back scale of a D than in the other S&S models? Wim Quoting Ron Nossaman <rnossaman at cox.net>: > > > Now this is why I think Wim was having probs with a newlyrestrungD. > If > > you don't tune the back scale or make sure the strings render when > > > stringing then as Ron just said the string render at random times. > Maybe > > a year or two or three later. > > Not that much later, I think. Weeks, maybe, but likely not > years. It has occurred to me though, that some of that initial > pitch drop we attribute to strings stretching could very well > be coming from the back scale. I'm still of the opinion that > most of the pitch drop we see in new pianos and rebuilds the > first year is from the cap crushing at the notch edge, perhaps > some from pinblock compression at the flange, and very little > of it from string stretching. > > Consider how many times we've read (and seen) that lightly > seating a string on the bridge often causes a rather dramatic > pitch drop. > > > > On another list about backscale tuning, I remarked that I just try > to > > smooth out the sound and tension of the back scale and asked > whether it > > would be better to raise the raise the pitch of the backscale or > lower > > it in comparison to the front scale. I got no answers. From what > Ron > > says here, I think taking the hammer shank and making sure the > backscale > > pulled up to tension+ in the stringing process is essential. Then > as the > > wire stretches, the backscale won't render through after tunings. > Since > > the rendering does this randomly with humidity swings and applying > the > > principle of "going halfway there never gets you there" even if you > are > > already halfway there, logically it must mean the tuning stability > sucks. > > > > Keith Roberts > > Even if you manage to get the back scale tension up without > damaging the bridge cap, it will likely always be slightly > higher or lower in tension than the front scale, depending on > whether pitch is going up, or down with temperature or > humidity swings. That's one of my basic problems with "tuned" > duplexes. They'll never be in tune unless the string tensions > never change, and if the string tensions never change, the > piano will never need tuned. > > Ron N > Willem Blees, RPT Piano Tuner/Technician School of Music University of Alabama Tuscaloosa, AL USA 205-348-1469
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