Great investigative stuff. I suppose thickness is not an absolute gauge of stiffness. Being a natural material which undergoes a certain amount of processing, there is bound to be a lot of fluctuation in physical properties. There is no question that in the end, having a material that behaves the same as the original is more important than having a material which exactly copies the original in dimension. Thanks for your input, John. regards, Jurgen Goering Piano Forte Supply (250) 754-2440 info at pianofortesupply.com http://www.pianofortesupply.com > > I had a look today at the damper bodies of an old Kirkman from the > days before they switched to a centred flange. Blowing up the > original picture and roughly measuring the visible slot on the > computer, it looks as if it is something less than 0.2mm, which would > include a small amount for the glue lines. I think I have a few of > the hinges to replace, so I'll make a point of measuring the old > vellum with the micrometer when I do this. > > I'll be taking a set of Blüthner strings to a colleague tomorrow and > it's quite likely his damper action won't be perfect, so I may get a > chance to measure these too. > > JD > > > > <unknown.png><unknown.png><unknown.png><P2A9A274A 3.png><P2A9A274A > 4.png><P2A9A274A 5.png> > > _______________________________________________ > Pianotech list info https://www.moypiano.com/resources/#archives -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: text/enriched Size: 1436 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20070216/01da1016/attachment-0001.bin
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