> From: wimblees at aol.com > Date: November 19, 2009 9:19:09 PM EST > > > > Bend the wire between the flange and guide rail. (You might need to make a double bend) > > Willem (Wim) Blees, RPT > > -----Original Message----- > From: David Weiss <davidweiss at embarqmail.com> > To: pianotech at ptg.org > Sent: Thu, Nov 19, 2009 4:00 pm > Subject: [pianotech] damper wire meets bass string > > List, > > What’s the best way to repair a buzz caused by a bass string vibrating against the damper wire? > > Thanks in advance, > > David Weiss Hi David, Wim's suggestion is often the fastest cure, but the *best* way to repair the problem is to move the hole. Since you asked for the best repair, which is a great goal to shoot for, here goes: • Remove the action. • Remove the offending damper. • Carefully pry out the damper guide bushing (if you are careful and lucky, you can often reuse it) from the damper guide rail. Clean out any glue (there may be none, or there may be some) without enlarging the hole or removing wood. • Determine the size of the hole in the wooden damper guide rail. Use the shank (non-cutting side) of a drill bit to find the proper size. You do have a 128 piece drill bit set, don't you? If not, get one ASAP - they go on sale for about $35 at Harbor Freight. • Using a rat tail file, or a handheld drill bit in a pin vise, or similar, enlarge the hole in the direction away from the buzzing string/damper wire contact, so that if you hold the shank of the properly-sized drill bit (that you chose in the step above) against the newly enlarged side of the hole, the drill bit should be centered between the strings of the two adjacent notes. • Glue in veneer (or just use thick CA plus accelerator) to fill the portion of the hole that was nearest the buzzing string. • Use the properly-sized drill bit to ream the now-moved hole to its proper final size. The hole should now be the same size as it was when you started, but in a slightly different location - centered between the strings of two unisons. • Reinstall the bushing (new or old, depending on how you did with removing the old one). Ream/iron/smooth if necessary, to allow a free but not sloppy fit for the damper wire. • Reinstall the damper and regulate the damper lift and positioning. Reinstall the action. Sounds complicated, but it doesn't take very long.... Good luck with it, Joe DeFazio Pittsburgh P. S. - the above works best if only one or two damper wires are buzzing (which means that one or two holes were mis-drilled at the factory). If many are buzzing, and if it's a new and cheap imported grand, the damper guide rail for that section may be out of place. Sometimes loosening the screws holding in the damper guide rail and repositioning the rail will cure most or all of the problem if this is the circumstance. Look very carefully at the centering of the damper guide bushings between the strings for each unison before deciding upon your course of action. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20091119/d361a363/attachment.htm>
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