Installing the newly felted damper heads into the piano is another one of those tedious jobs in piano restoration. The damper needs to sit squarely on the string, must be centered over the string, and must lift evenly at the proper time in the keystroke. All this is accomplished by bending and adjusting a thin wire that connects the damper head and felt to the underlever system. When done correctly, the entire set of dampers will lift evenly without "winking", or twisting. Most importantly, they will provide good damping of the vibrating string. Poor alignment and sloppy installation of dampers is a promise of poorly damping strings. In fact, even when you do the installation very carefully, you usually still need to tweek a string or two that is bleeding. I plan to share a technical on this subject on Tuesday evening when I host our monthly PTG meeting at my shop.
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