This is my latest contraption (I love that word...) for hitting keys. #fingertip #UserTag1 #blow #Forms #hitting #spring #hit #key #test #tuning
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A slightly modified pop rivet gun removes balance rail key pins axially, thus avoiding damage of the original hole. The only modification to the tool was to bore out the tip of the tool to match the diameter of the key pin. #extractor #puller #keypin
MOV02315.MPG
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Found on the bottom key (#1) under which was written in fine script: "Tanneberger'. #Keyweightingdevice
DSC03079.JPG
An excerpt from my book Pianos Inside Out illustrates that the hammer slows down (the distance it travels every two millimeters of key travel becomes shorter) as the key reaches the let off point. By my observations from this series of photos, also confirmed by my measurements, in this action...
Book_p284.pdf
pieces of toothpick glued to each side of the key pin. #balancemortise #looseharpsichordkey #keybutton #harpsichordkey
20a hps balance bush close.jpg