[pianotech] JD's take on scales - - was New String broke twice

[Joseph Garrett]

JD said: "It depends on the length of the scale how much scope there is for 
varying the type of scale, but for the average upright you can expect 
to have the bichords at a tension of 180-190 lbs., the top single at 
about 240-280 lbs and the tension falling gradually to the bottom 
note, whose tension will depend on the length -- anything from 170 
lbs. to 220 lbs. roughly speaking."
 
JD,
That may be the case on your side of "the pond", but it sure as heck isn't
the case here. In my experience there are several variations on the bass
string scaling thang. 1. Note #1, (a single string),  has a high tension
and as you ascend the scale tension drops. 2. Note #1 has an average
tension and it is maintained as you ascend the scale. 3. Note #1 has a low
tension, (around 30 % of the B.S. or so), and the tension goes higher and
the B.S. increases as you ascend the scale. 4. The Bi-chords/Tri-chords can
do the same little dance. All of these variants are present in the U.S.
made Uprights, (and a whole lot of Euroean as well<G>), in various
scenarios. The best attitude is: The only consistancy is a Total Lack of
consistancy!<G> Well, that's the way it is here in "The Colonies"!<G>
Regards,
Joe


Joe Garrett, R.P.T.
Captain of the Tool Police
Squares R I