I would try the Protek CLP first. It's quick, and if that does the trick it is also inexpensive. If it's only one or two jacks, it could be a broken jack spring, but I've never had to replace a number of them due to weakness. Clyde Eliot Lee wrote: > Hello, > > I had an old upright piano (Ludwig) with very sluggish jacks affecting > repetition particularly in the high trebel. Could this be from the coiled > jack spring? I lowered the capstan and eased the keys still didn't help > much. I noticed that there were no leads in the keys. > > Is this a sign that the wippen or the jack should be repinned? What > about treating with protek? > > Thanks for the help. > > Eliot Lee
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