---------------------- multipart/alternative attachment Listers After a recent encounter with a 10 year old 6 ft. Petrof ,my once fairly high opinion of them has sunk. I generally have liked the sound of there bellies & the workamnship looked good but I had the following experience. The action although upon examination had a nicely done 5.3 overall action ration the touch was extremely heavy high 60's down & below 20 up. The problem is that the hammers were just way to heavy for example Note 16 was 10.5 grams. That's hammer wt. not strike weight. So extrapolate those heavier than normal readings thru the rest of the scale. Since the desired service was to make it play more like a Saturn than a truck & no parts were being changed the original parts were used. The remdey was to add one lead to a sparsely leaded keyboard & then adjust the wippen springs. Even at that the average down up weight was around 56 to 22 up which is a 39 balance weight. I believe the real solution was a lighter set of hammers & subsequent even leading applied with springs detached to some higher than normal nominal number down/up numbers & then re -tweaking the springs. for a light bit of wippen weight removal from the system. This to me was a prime example of a nicely done leverage set up that was doomed from the git go due to extreme hammer weights It seems all grand piano actions fall within certain reasonable & typical leverages that when exceeded are problematic until rectified by appropriate counter measures. ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/e0/14/0d/e9/attachment.htm ---------------------- multipart/alternative attachment--
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