Look for a message that came on 8/1 titled ptg.org mailing list memberships reminder all the info is in there. ----- Original Message ----- From: "pianotune05" <pianotune05 at comcast.net> To: "Pianotech List" <pianotech at ptg.org> Sent: Saturday, August 12, 2006 5:36 PM Subject: switching to digest mode > HI everyone, > I wanted to know how to change to receiving the list on digest mode. Any > suggestions? Thanks > Marshall > ----- Original Message ----- > From: "Ric Brekne" <ricbrek at broadpark.no> > To: <pianotech at ptg.org> > Sent: Saturday, August 12, 2006 3:50 PM > Subject: Key Bushing Clearance/Friction, was: Key mortise correction > > >> Hi Terry >> >> You dont really. 0.002" and 0.005 are rather more like of theoretical >> values which ends up being very close to what the <<optimalized>> bushing >> feels like. You develop a feel for this sideways motion in both the >> keybutton and the front bushings. And... as such things go... the actual >> results vary a bit from tech to tech. Experienced techs whov'e gotten >> good at this however display a pretty high degree of likeness in end >> results. >> >> As for how much friction this ends up yeilding. Total key friction >> shouldnt end up being more then absolute max 2 grams IMB... and I strive >> for 1-1.5 grams. I find it difficult to understand how you can >> consistantly get lower then this and still maintain firmness of play >> myself. >> >> Cheers >> RicB >> >> --------- >> Two questions: How do you go about measuring key bushing clearance? And >> how much key friction does these specs commonly yield? >> >> Terry Farrell >> ----- Original Message ----- >> SNIP >> 4. Tight key bushing's. Gently squeeze the bushing to have .002" >> clearance at BR bushings and .005" for FR bushing's. >> >> Regards Roger >
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