[pianotech] S&S K52 messaroundwith thang

[Encore Pianos]

Gene, while I agree with others that the questionable benefit is not worth
the considerable effort involved, I applaud the effort you have expended
thinking this modification through.   Right or wrong, exercising the noodle
in a serious way should never be criticized.  

Will Truitt

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Gene Nelson
Sent: Saturday, June 09, 2012 12:17 PM
To: pianotech at ptg.org
Subject: Re: [pianotech] S&S K52 messaroundwith thang

Thanks Ron,
I think that I will set up a bench test before I decide on what to do.
I got to see what this would look like and get a feel for the carving as
best as I can.
Certainly notching would be easier than agraffes.
Gene

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Ron Nossaman
Sent: Saturday, June 09, 2012 9:03 AM
To: pianotech at ptg.org
Subject: Re: [pianotech] S&S K52 messaroundwith thang

On 6/9/2012 10:33 AM, Gene Nelson wrote:

> *** I did take the time to try out this idea of carving the bridge as 
> opposed to retrofitting agraffes in order to create equal string 
> lengths in the bichords. I laid out my paper string pattern and tried 
> to pencil in a notching pattern onto the bridge outline that matched 
> the 27 degree angle of the upper termination. The issues that I see 
> are that this will tend to narrow the string spacing, decrease the 
> string off-set at the bridge pins and the front and rear relief 
> notches may cause interference with neighboring strings and or 
> notches. Making a jig that would help scribe the 27 degree off-set 
> onto the bridge at the speaking length is easy enough but I think I 
> may need larger diameter bridge pins than are available to get a good 
> off-set. I really do not think it will work. Gene


If you're using the pin diameter to supply offset angle, it doesn't matter
(within reason) what angle the bridge is to the strings. The geometry
doesn't change with bridge angle. The notch looks backward (and is), but the
function and working room is unchanged. Making the notch perpendicular to
the string is both unnecessary and counterproductive in this case. Notch to
accommodate the top bearing mound so the notch is parallel to it, spec the
same speaking length for bichords within a unison, and let the winding ends
fall parallel to the notch and top bearing mound. Or, bevel the bridge
instead of notching, spec the same speaking length for bichords in each
unison, and you won't hear any difference.

This is not nearly as big a deal,nor as complicated, as is being presumed.
Ron N