If your "48g (easy) downweight and 28g up" numbers are accurate and representative of the action, friction does not appear to be a problem. Those two numbers give a balance weight of 38 grams, not out of the workable range. How many leads are there in the bass keys? Seems as though you may have an inertia problem (too much mass in system). How did you measure action ratio? I find these action problems always fun and challenging - as I learn a great deal each time I work through one of these. Please keep us informed of your evaluation. Terry Farrell ----- Original Message ----- I am now looking after a 12 year old Petrof concert grand which has been aquired by a church for recital use etc. It is a super piano tonally and in great condition, but it looks as though I will have to attend to the touch in the near future. I have played it extensively myself and had a top rate professional pianist try it out and the basic problem appears to be that it becomes tiring to play because the touch 'appears' heavy. On measuring the touch weight weight however, it comes out at an average of 48g (easy) downwight and 28g up. Present regulation is very good. It is Renner action with smallish Renner hammers which I am sure are original. The action ratio is in the 5.5 range. It has to be said that I intend taking the action apart and check out all the centering and any key friction, and I expect this to make the touch more even. That said, I still appear to have a fundamental problem which I will need to be addressed, and I am asking for comments and ideas on how to approach this. Don't hold back! ric -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20060711/c2a96fef/attachment-0001.html
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