How did you determine the hammers previously installed were for a 212 Bechstein? David Ilvedson, RPT Pacifica, CA 94044 ----- Original message ---------------------------------------- From: ricb at pianostemmer.no To: pianotech at ptg.org Received: 6/22/2008 6:32:04 AM Subject: Bechstein B hammer rake / more thoughts >Hi all, >Just got what on the surface of it is much better advice from a >fellow who used to work at the old Bechstein factory, and another >fellow who runs a factory in Denmark. Both with the German meister >degree, and both had the same thing to say. >Bechstein bore length is figured from by taking taking the string >height subtract the shank center pin height, and subtract 3 mm more. >The only fudging needed beyond that is to compensate for any changes >in string height due to the way the plate may have been installed, >and this by and large confines itself to a couple mm. The design >simply calls for the shank to be 3 mm higher at the end of the shank >then it would be if it was horizontal at impact. Nothing like >straight forward advice. >There is no problem with getting the action in and out... I could >have the hammers 10 mm higher then they are with no problem. The only >clearance problem is the actual space between the end of soundboard >and the beginning of the pinblock for hammer travel, and this only in >those well known areas in the top two sections. My only concern with >changing hammer rake has been creating a problem there. >Following the above advice has worked out perfectly. Very easy to get >close to a perpendicular to string orientation without draconian >rakes. >Turns out this instrument has the wrong hammers on. Someone put on a >set for a Bechstein 212 and this is a B. >Still, this whole subject matter, prompted by some bright thoughts by >John Delecour a couple of month back as got me thinking about a more >considered approach then what I've been working with, and what the >usual advice seems to be up to now. >Cheers >RicB
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