Ric, I've wondered if CAing the pins is actually coupling the string to the bridge too. I thought about that and figured it couldn't hurt. I did voice the piano I treated with CA later and I didn't have falseness come back in a noticeable way. It could be that the CA soaked into the surface of the bridge under the string making it better able to transfer energy. I must agree with Joe on rust nodes being a potential source of falseness too. Rubbing rusty strings down to clean them does seem to help. That or the stretching evened things out... ;-) Andrew Anderson At 08:21 AM 12/18/2005, you wrote: >Hi Dale > >Agreed on all points. Which really just further goes to strengthen >my skepticism to the loose pin thingy. There are just to many other >things that happen that seem to cause the same kind of >falsness. Ok.. I admit it seems sexy enough to jump to the >conclusion that loose pins are the problem. Over pull can stress >the pin one can argue and cause it to become just loose enough. But >then again you can double check this and find the pin is not loose. >Or you can double check in other ways I've written in a couple other >posts. Something about the loose pin idea just doesnt quite >wash. None of this means we shouldnt use tricks we know help >aliviate the sypmtom mind you. It just goes to looking further as >to what the root cause of this kind of falsness is. Same thing >really goes to the stringing processes. If over pull or artificial >bending around the hitch pin contributes to falsness, then we should >avoid doing so. That doesnt mean we understand whats really at work tho. > >There is another problem with the loose pin causes false beats >idea... there is no plausable mechanism for how loose pins cause >this beating given. In fact there is no mechanism for how this >should work given at all as far as I can see. Its just seemingly >..... accepted. Looks like more of magic past to me. Personally I >have a feeling that these various causes and manipulatives we >observe have to do with some mechanical coupling problem we have yet >to identify. Perhaps it is some kind of phasing problem we are >looking at. If we could identify the exact and direct cause... then >we could eliminate this kind of falsness every time... once and for all. > >Since we cant at present... seems obvious we havent identified the >root cause. >Cheers >RicB > > >Hi Ric > 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. > I believe that a large part of string falseness is caused or created in >the stringing process in 2 ways. > 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. > Now if your not buying that one then here is the no.2 reason is ,& I am >absoultely convinced of this. > 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. > 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 > > >_______________________________________________ >pianotech list info: https://www.moypiano.com/resources/#archives
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