We all have seen the broken cords on the hammer butt springs on Yamaha uprights. Perhaps many of us have replaced a set. I have several Yamaha uprights with this condition (several to many broken cords) in my service clientele. I don't play. I tune them. I hit the key and the hammer returns. So what difference does the spring/cord make? I can see that if you had slow action centers, it would make a difference, or if you were an advanced pianist, the quicker returning hammer might make a difference. I guess a broken cord should also cause a reduction in downweight and a decrease in upweight, and therefore an overall decrease in performance, i.e. less expression control because of too light a downweight and slower repetition because of slower key return. Hmmmm. Did I just answer my own question? I think I may have. Anything else I have missed? Thanks. P.S. how many hours do ya'll figer to replace 88 butts, align hammers & travel? Maybe 12 to 14 hours? Has anyone any experience with other hammers on Yamaha uprights? Terry Farrell
This PTG archive page provided courtesy of Moy Piano Service, LLC