John, I doubt that it was metal fatigue or moving in the 'doublet'. (I've never heard that term before, either.) I've worked with backchecks purchased in this country and also some from Renner (in Germany). The Renner ones are just simply much stiffer wire than most others. A rebuilder friend of mine uses those for just that reason. Avery >David, > >You've introduced a term, "doublets", that I don't find the the >PianoTech or CAUT archives, Piano Parts and Their Functions, Schaff >catalogue, or the Steinway Technical Reference Guide. This piece is >clearly shown in all the diagrams, but nobody gives it a name that I can >find. > >I'm glad you brought this up. When adjusting backchecks in the past, >there have been times when it seemed that too little force was required >to bend the backcheck wire in order to get a change in checking height. >I have thought that there might be metal fatigue in the backcheck wire, >that it might be close to breaking. Now I suspect that the wire is just >moving in the enlarged hole in the ... doublet. > >Others, pleas comment. > >Thank you, > >John Baird > >"David M. Porritt" wrote: > >> I have a "D" in a recital hall that the doublets don't hold >> backchecks firmly. The checks and wires have been changed too many >> times I guess. I called Steinway to see if they sold doublets for the >> keys, and they said no. They suggested I make some from laminated >> wood, or solid maple. Have any of you had to do this? This action >> really needs some work done over winter break and that's going to be >> my best opportunity to do it. Any suggestions? dave >> >> _____________________________ >> David M. Porritt >> dporritt@mail.smu.edu >> Meadows School of the Arts >> Southern Methodist University >> Dallas, TX 75275 >> _____________________________ >>
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