Restored Baldwin out the door

[Farrell]

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