------------76842A701A1B0 You have my sympathy. I have serviced an Imperial Bosendorfer (I'm not certain since Kimball acquired them if its really a "Bosenball" or a "Kimballdorfer") at the University of Texas San Antonio (UTSA) since 1983. It is used so much that it is frequently tuned everyday. One of the problems as I understand it is that pinblock problems developed in the pianos being imported into the United States. It was then decided to use a high density (multi-laminate) pinblock but they continued to use 1/0 tuning pins resulting in pin torque.(twisting along its longitudinal axis). I believe this may be the problem you are encountering when you must overturn the pin and then it goes further than you want it to. Try some impact method to insure the pin actually turns. Another problem with the Imperial I service is the strings ride up the bridge pins and will go out of tune and or develope false beats. I must regularly tap the strings back to the bridge and this usually affects the amount of tuning. This piano is dramatically affected by temperature and humidity changes. It must be at the same temp each time it is tuned. The recital hall temp is 68 degrees with the lights off and it increases to 85 degrees after the lights have been on for a while. This piano will vary 5 beats depending on temperature. These are just some idle thoughts. I am sure I will think of more. In the meantime, contact Newton Hunt. He worked in the Bosendorfer factory one summer ( I think) Good luck Lee Sankey LSankey@swbell.com ------------76842A701A1B0 <HTML><BODY> <DT>You have my sympathy.</DT> <DT> </DT> <DT>I have serviced an Imperial Bosendorfer (I'm not certain since Kimball acquired them if its really a "Bosenball" or a "Kimballdorfer") at the University of Texas San Antonio (UTSA) since 1983. It is used so much that it is frequently tuned everyday.</DT> <DT> </DT> <DT>One of the problems as I understand it is that pinblock problems developed in the pianos being imported into the United States. It was then decided to use a high density (multi-laminate) pinblock but they continued to use 1/0 tuning pins resulting in pin torque.(twisting along its longitudinal axis). I believe this may be the problem you are encountering when you must overturn the pin and then it goes further than you want it to. Try some impact method to insure the pin actually turns.</DT> <DT> </DT> <DT>Another problem with the Imperial I service is the strings ride up the bridge pins and will go out of tune and or develope false beats. I must regularly tap the strings back to the bridge and this usually affects the amount of tuning.</DT> <DT> </DT> <DT>This piano is dramatically affected by temperature and humidity changes. It must be at the same temp each time it is tuned. The recital hall temp is 68 degrees with the lights off and it increases to 85 degrees after the lights have been on for a while. This piano will vary 5 beats depending on temperature.</DT> <DT> </DT> <DT> </DT> <DT>These are just some idle thoughts. I am sure I will think of more. In the meantime, contact Newton Hunt. He worked in the Bosendorfer factory one summer ( I think)</DT> <DT> </DT> <DT>Good luck</DT> <DT> </DT> <DT>Lee Sankey</DT> <DT>LSankey@swbell.com </DT> </BODY> </HTML> ------------76842A701A1B0--
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