This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment I have a question that I suspect maybe only Del or Ron N or Ron O might = be able to answer.=20 In Del's class on small piano design, he has talked about = characteristics of soundboard design that will greatly influence the = tendency for a piano to exhibit false beats. I forget what that = explanation was. It may be related to stiffness, maybe impedance - = something like if the impedance of the board is greater/lesser than the = note frequency in that area of the soundboard the piano will/won't be = prone to false beats.=20 The bottom line was that if the soundboard is poorly designed in this = respect, almost any defect in wire or terminations or whatever will = cause false beats. However, if the soundboard is properly designed in = this regard, even a loose bridge pin or a kink in the wire will likely = not produce a false beat. What is it about soundboard design that influences the tendency for the = piano to develop false beats? Ron? Ron? Del? Anyone else? Terry Farrell ----- Original Message -----=20 I have waited for this subject to come up again because I believe = there is a cause that I've not seen addressed & fits into what your = experience has born out. While I believe a tight solid pin, proper down = bearing & bridge angle are absolutely needed for good string mechanics = there are conditions where all the right conditions for pure strings = exists but the wires are as false as Dollie Partons ........wigs. Grin.=20 I believe that a large part of string falseness is caused or = created in the stringing process in 2 ways.=20 1st, the string having a natural coil & memory should be installed = by allowing it to freely wrap around the hitch pin in the natural bend = or or coiled condition in which it takes as it comes off the coil. Or so = as its' not bent back against itself. I believe this keeps the wire from = excessive twisting as it is pulled to pitch.=20 Now if your not buying that one then here is the no.2 reason is ,& = I am absoultely convinced of this.=20 I believe over pulling the string too far above pitch in the = stringing process deforms the string. Its' that simple. We once had a stringer who was very good but we had many false = beats. One day in conversation about this I asked if there was = anything she could be doing to create this & she said no. She said I = always pull the strings a half step sharp of there intended final pitch = as a I string just like you told me.=20 I said ^%$##!#$&*(*_) Slight communications flop. I had told her = to pull the strings only up to pitch as she went. SO after that the = false beat issues were greatly reduced. Also we swicthed to the Mapes = Gold wire & I feel it produces even less falseness than the Roslau wire. My 2 cents worth for what its' worth Dale Erwin Because for an explanation or theory to have any meaning, it has to = be=20 consequent in dealing with the phenonema it attempts to explain. = There=20 are too many cases where this particular theory doesnt hold up. You = can=20 tighten a loose pin without solving the problem, you can experience = a=20 clean string with absurdly loose pins. The <<sometimes>> effect of = tightening a loose pin or putting pressure on it points (at least = me) in=20 another direction. If the tight pin theory is really valid, then in nearly all cases... = if=20 not all... a false beat will occur when a pin is loose and it will = be=20 eliminated upon tightening the pin. Since this is quite clearly, for = not=20 to say obviously not true... then the theory has a major problem. There is no doubt something that changes sometimes when manipulating = the=20 pin/pin hole relationship in various fashions. But it I dont think = its=20 even close to been really shown that its simply a matter of the pin=20 being loose. Not by a long shot. Cheers RicB ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/f0/db/6f/08/attachment.htm ---------------------- multipart/alternative attachment--
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