----- Original Message ----- From: Richard Brekne <richardb@c2i.net> To: PTG <pianotech@ptg.org> Sent: Thursday, March 09, 2000 4:09 PM Subject: Quiz Time > List.. > > Bumped into something "new" today.. so I thought I would put it forward > in the form of a quiz. > > Piano... August Førster... about 20 years old. > > Symptom..... Blubering on soft play reported by the owner. In addition > my own feeling of a kind of "heavyish" feel to the action. > > Conditions: Letoff was at 1.5 mm - 2.5 mm, checking was well within > acceptable parameters, key dip was 10 mm and this was way more then > enough for jack clearence under the knuckel. No lost motion yet jacks > easily slipped under the knuckle on release. Dampers... newly regulated > and in fine shape. Jack stop rail adjusted for plenty of clearence. Keys > level and at factory specified height. > > In spite of this seemingly fine situation there were about 30 keys that > were blubering on soft play. Took me a few minutes dinking around to > figure it out, and I am sure I have seen this exact problem before > without solving it.. but this time I got it right and I was really a bit > suprised at the dramatic results. Blubering completely dissapeared and > the "heavyish" feel to the action was totally relieved. > > Good hunting... Answer tommorrow. grin > > > > -- > Richard Brekne > Associate PTG, N.P.T.F. > Bergen, Norway > Hi Richard, Repetition springs to strong on blubbering hammers? Doug Mahard
This PTG archive page provided courtesy of Moy Piano Service, LLC