Hi Steve This description of the action is one that has been floating around on the net in one form or another for many years now. The translation of the directions from the German was pretty bad and you will find some of the points do not match the picture so well. We had a discussion about this a couple years back either on Caut or on Pianotech where we hashed out a pretty good set of directions, but I havent gotten around to re-writting yet. The points on the list do not correspond to the picture. The list of directions is a step by step regulating procedure. The parts description that used to accompany the picture has been lost. I've yet to find it. In particular points 6 on the list of directions referers to point 9 on the picture. Point 8 on the picture is a kind of repetition jack spring and is not mentioned in the regulation procedure at all. It needs to be strong enough to avoid a kind of CAF effect that can occur but at the same time not so strong as to yield a clicking sound created when the jack releases back into the stop felt on the abstract (point 7 on the picture). That felt can get compacted over the years as well and can need replacement. Point 4 on the list can be read as "key dip" instead of "touch" Let off is suppose to occur such that the jack comes out from under the abstract nose (knuckle) just as the bottom of the key hits the front rail felt punching (called baize in the list). The hammer shanks at rest should be on the hammer rest rail. Thats regulated so that the blow distance is 45 mm. You start with blow and a default key dip of 9.4 mm, go through to point 6 and then recheck that your keys are touching the key front felt punching at letoff... then proceed. Cheers RicB http://www.pianostemmer.no/files/Bluthneraction.doc Debbie Cyr In a message dated 12/9/2009 8:57:24 A.M. Eastern Standard Time, shsnyder1 at verizon.net writes: What can anyone tell me about this Bluthner piano action Thanks! Regards, steve -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/caut.php/attachments/20091211/aff82e84/attachment.htm>
This PTG archive page provided courtesy of Moy Piano Service, LLC