This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Man, I need to take a class on this... David I. Original message From: "William Ballard" To: Pianotech Received: 9/13/2005 7:39:18 PM Subject: Re: Mother goose string leveler At 10:13 PM -0400 9/12/05, Erwinspiano@aol.com wrote: Anybody else discover this little Jem? Previous to what I now do (which is nearly twenty years old), I used to= use one of the drill guide blocks from the upright hammer hand-boring = jig, the half-hole one (being the thinner of the two guide blocks). But then I noticed that getting the three strings to contact the block = still wouldn't guarantee the same hammer-to-string contact when you wen= t from standard keyboard position to Una Corda. The only thing worse fo= r a UC sound than un-level strings is hardener at the strike point. So the final step in hammer re-shaping is to confirm that the hammer st= rike surfaces are level and square, usually with a straight edge sittin= g on the hammer flanges, but always being certain that what you're sigh= ting across is the strike surface instead of slightly over the hill fro= m it (one side or the other). I'd already figured out that it doesn't t= ake to many mils of error here to turn one string into an audibly "open= " one, all the more so with harder felt than softer. Anyone who has run= across Don Mannino's "speed bumps" has noticed this. With the hammer strike surfaces confirmed to be level and square, I che= ck open strings, first in the standard position and then the UC for eac= h note. If I hear open strings in the standard position, I make a menta= l note on the beach of my brain of the exact pattern LH/C/RH and see wh= at happens to that pattern in the UC (remembering off course that the = LH string is out of the picture). If the open string pattern for the C/= RH strings stays the same, it's the strings which aren't level. If the = C/RH string pattern equals what the LH/C pattern was, then my strike su= rface leveling wasn't good enough. If the UC C/RH pattern bears no rese= mblance to either the standard position LH/C or C/RH, then the level at= both the strings and the strike surface are out to lunch. But with goo= d hammer re-shaping, it'll rarely be anything except the fist scenario = (ie., the open string pattern has stayed with the strings instead of mo= ved with the hammer). I've noticed it is important to put the device as close to the striking= spot on the string for accuracy as it is level strings at the hammer = strike point I noticed that too, with a dial indicator under the strings and samplin= g the string level at various points approaching the actual strike poin= t. Bill Ballard RPT NH Chapter, P.T.G. "When writing a mental note, first procure a mental piece of paper" ............mental graffitti +++++++++++++++++++++ ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/76/05/c8/79/attachment.htm ---------------------- multipart/alternative attachment--
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