Hi John, According to my Piano Action Handbook by Randy Potter, RPT The Petrof V (155cm/5'3") grand has a Key height of 64mm and hammer blow of 46mm. hammer let off of 3-1.5 mm and key dip of 10 mm. In fact all the Petrof grands (V,IV,III) have the same specs. The model II and I have a 10.5 mm Key dip. Scott Gray Montana sunlitedreams.com On 8/13/2010 1:54 PM, jrpiano wrote: > *I need the help of the list again.* > *I have a Petrof small grand I am trying to regulate.* > *When I try hammer to string of 1 7/8" the hammer rests on the rail.* > *When I measured the key height, it is 2 3/8" not 2 1/2".* > *Anyone know what it is supposed to be?* > *Thank you,* > *John Ross > Windsor, Nova Scotia, Canada > jrpiano at win.eastlink.ca <mailto:jrpiano at win.eastlink.ca>* -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100813/6ac606a6/attachment.htm>
This PTG archive page provided courtesy of Moy Piano Service, LLC