I moved the knuckle out 2mm from the center - so now it is 18mm. Jack/knuckle alignment isn't quite as good - but not real bad: It looks like my knuckle core might not be real square with the shank - I'll double-check that (could just be the camera angle) - I cut the slot by hand and it was a little bit sloppy. Looks like there is plenty of room for the jack in it's new rest position in the rep lever window: But more to the point - WOW! DW went from 50g to 43g and upweight is still okay at 23g. So now I will do some calculating and figure out how much lead I can remove for a new target front weight. Gettin' more lead out can only improve this action I think. If I'm going to end up moving knuckles, I guess I'll have to dig through the archives on shank notching techniques - I know there have been a number of discussions on that topic. Terry Farrell > ----- Original Message ----- >> What is the knuckle radius? >> If you can bump it out to 17 or 18mm >> you can increase the dip and get rid of some lead. > > So you are of the opinion that my dip is undesirably small? How can you be > so smart to know that this action had lots of lead in the keys? ;-) > > 16mm. I'll look to see if there is room in the rep lever window. Getting rid > of lead would be good, I think. I have reduced the lead from six in the bass > to 4-1/2, but that is still a fair bit of lead compared to the ideal of > three in the bass to none in the treble. > >> Maintain about a 90 degree angle between the jack and shank at rest. > > I think it's close to 90 degrees now - I'll look to see how moving the > knuckle out further will affect things. > >> Is the wippen flange centers at a good height? Usually 2 1/2" below the >> HCH. > > I'm trying to imagine what HCH could be - and am failing. What is HCH? > >> Jon > > -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20070703/a9c986df/attachment-0001.html -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/jpeg Size: 48267 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20070703/a9c986df/attachment-0002.jpe -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/jpeg Size: 36901 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20070703/a9c986df/attachment-0003.jpe
This PTG archive page provided courtesy of Moy Piano Service, LLC