Ron... it is precisely that I have done this, and looked at a variety of conditions and found they do not always give the stated results that my doubtfull attitude towards the loose pin theory was born. The fact is that it is easy to show many exceptions. I know, because I've pulled too many pins, CA's too many pins, tried too many undersized pins, tried too many conditions that show results that dont fit into the theory. Obviously something is going on when the fallness does get reduced.... but just what is another question entirely. Dont get me wrong. As long as one finds a significant reduction in falseness as a result of the treatment I think it wise to put the trick into ones bag of tricks. But I dont think we should just fold our arms and feel satisified that we understand what causes false beats by the same token. We may end up finding out that falseness is a coupling problem that can be aliviated in a number of ways. In fact heres one that you may not have tried that I know works often as not. Put out a pin (loose or not) that terminates a string with false beats and put a slight bend in it in the middle, then re-insert the same pin. Also try doing the opposite of what we are told to do... make the pin looser. You'd might be suprised how often this later <<works>> Cheers RicB Ron O writes: I suspect that you haven't applied CA to a piano which displayed falseness due to loose bridge pins - following a heavy screw-driver test. We've used CA numerous times and it significantly reduces falseness and cleans up tonal quality at the same time.
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