I have encountered severe cases such as you describe, where no amount of lubrication would relieve the problem. My solution was as you described with a brass half round counterbearing. However, I would not totally eliminate the felt, but select a thickness of felt that will only lightly contact the string. I would also use a narrower width felt. It doesn't take much to silence this tiny string segment. Frank Emerson > [Original Message] > From: Jon Page <jonpage at comcast.net> > To: <pianotech at ptg.org> > Date: 8/3/2007 9:20:32 AM > Subject: Counter-bearing drag > > There is a S&S locally right on the water, well not really, water > view/water front. > > There is noticeable and detrimental drag to a section in the high tenor. > I can move the lever almost '5 minutes' (clock index) before the tension drops, > conversely on raising. Needless to say, these notes are not stable. > > Short of replacing the wire in that section (complete restringing is > not in the cards > for this family) could a thin brass strip be placed between the > strings and counter- > bearing to facilitate the rendering of the strings. If not only a > small curved segment > at the top edge of the felt. > > I plan to replace the strings on my next visit to their area > but thought this might be an expedient option. > > When restringing, I don't replace the counter-bearing as originally designed > with friction for the entire surface. I limit it to the top edge. My > next one wil > have simply a half-round or half-oval with non-bearing felt between > that and the agraffe. > -- > > Regards, > > Jon Page >
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