Gotcha. Excellent. Thank you. Terry Farrell ----- Original Message ----- From: <Erwinspiano@aol.com> To: <pianotech@ptg.org> Sent: Sunday, January 05, 2003 5:17 AM Subject: Re: Restored Baldwin out the door > > When you do a board this way, how do you set your downbearing? Thanks. > > > > Terry Farrell > > Terry > Without being terribly specific I use a pre -stressed method of > setting bearing with a graduated downbearing pressures protocol. (Increasing > angle of deflection ) It's described well by John Hartman in the August 1995 > "The effects of Downbearing on tone" I've come to check/confirm uniformity > after it's strung by using a Lowell buble gauge. I like to see 6 lines > (.018) of movement (residual bearing) thru the bulk of the piano with less at > the tenor bridge end and a bit more in the very top treble. I string the > tenor/treble chip up to pitch before I recheck/reset my bearing felts and > shims in the bass to get appox. 1/2 degree bearing at the crossover down to > zero in the bottom of the mono chords. > This is especially sensitive and critical to me when setting bearing on > the dreaded cantilever bass bridges so I wait till I can see a very clear > picture as how the board squashes down under the plain wire load. This way I > can call it right on. > Regards--Dale Erwin
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