Long treble strings.

[Delwin D Fandrich]

Most older scales use a C88 speaking length in the neighborhood of 48 mm. One
exception being the S&S Model S which I have measured as long as 63 mm. And,
yes, this give a tension of some 223 lbs (using their standard #12 1/2 gage
wire) at a breaking strength upwards of 80% (depending on whose wire is being
used). And, yes, it is generally impossible to tune the top few unisons to
pitch.

The only reasonable solution is to recap (or replace) the bridge.

In general, 54 mm is a good starting point.

Del

| -----Original Message-----
| From: pianotech-bounces at ptg.org 
| [mailto:pianotech-bounces at ptg.org] On Behalf Of Jon Page
| Sent: October 27, 2006 11:58 AM
| To: pianotech at ptg.org
| Subject: Long treble strings.
| 
| Just got in a S&S S, c. 1936, with few broken strings in the 
| 13 gage section. C8 measures 56 mm.
| Shouldn't it be 53 or less?
| -- 
| 
| Regards,
| 
| Jon Page
|