---------------------- multipart/alternative attachment Dan writes It has been interesting to note that generally a piano with "comparatively" (That is compared to the many other pianos I service) good bearing will, as a rule, have more power and sustain than those with little or none. It has also been of interest that most pianos will have varying degrees of bearing depending on where you measure along the bridge and, again, differing measurements from bass to treble bridge on the same piano. I cannot confirm this with scientific accuracy as of yet but it appears that there is generally a direct correlation between lack of bearing and weak tone in a particular area of a piano Dan --I find this phenomena in most pianos. It may be just 1 note & it can be right next to a note that sings. I'll even swap the hammers to see if this is the difference & it never is. Plucking the strings will reveal this as well. I belive it's some form of design impedance or lack of it that cause this anomlaly. Once you start noticing this you can find this on many pianos. It is true that if bearing is set inconsistently ,that sections of notes will be affected. Typically a loss of crown& thus bearing will effect the killer octave first but just as common in my practice I'll find a group of notes in octave 4 from about f thru d that have a weak sustain & a thwack type impact sound. .(i.e. many pianos have very poor tonal characteristics at the end of the treble bridge, crossing over to the bass. Very often, little or no bearing exists at this spot on the bridge. More than a coincidence, I think.) This is caused by different things. Low string tensions for one, lack of bridge mass. or stiffness int he board by being to close to the rim but not usually bearing unless its severe. Dale Erwin Erwins Pianos Restorations 4721 Parker Rd. Modesto, Ca 95357 209-577-8397 Rebuilt Steinway , Mason &Hamlin Sales www.Erwinspiano.com ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/78/41/3c/1b/attachment.htm ---------------------- multipart/alternative attachment--
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