<html> <body> Since it hasn't been mentioned, I'd also check the damper lift in relation to the key. If it's too early, that can also give a "heavy" feel. Avery At 12:25 PM 7/11/2006, you wrote: <blockquote type=cite class=cite cite="">Hey, Ric---check the amount of material at the bottom of the balance rail hole.  If it's more than 3-4 mm from the bottom of the key upwards, the keys are binding internally on the balance rail pins, and that's where your "heaviness" is coming from.  Get a balance hole reamer from Yamaha or Jurgen at Pianoforte Supply; one little tool can make you a superhero. If that's not it, check the action spread; the "magic line" compliance of capstan and whippen heel. Hope this helps.... David Andersen > 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</blockquote></body> </html>