Double bass strings/setup???

[Ewan Dumbleton]

Thanks for the response, Ken.
I’ve uploaded a couple of photos of the bridge and nut areas.


Stop positions
Here are the measurements of stop positions. The measurements are along the string from the flat face of the bridge facing the fingerboard. Bridge thickness at the string seats on the bridge is about 5mm.


Bridge to nut measurement is 1043mm for all strings

• Octave position: 533mm on E string; 524mm on G string.

• Fifth position: 709mm at B on E string; 699mm at D on G string.

• Major third position: 836mm at D# on B string, 831mm at B on G string.

• Semitone position: 995mm at F on E string, 989mm at Bb on A string, 991mm at Eb on D string, 986mm at Ab on G string. (ie, rather uneven across the fingerboard) (see photo).

Apart from the semitone position, the stop positions are stepped reasonably regularly across the fingerboard.


String clearance (as a proxy for fingerboard scalloping)
(Measurements with no string stopping)

• End of fingerboard: G: 5.0mm, D: 6.6mm, A: 7.3mm, E: 7.4mm

• Octave position: G: 5.9mm, D: 7.1mm, A: 7.2mm, E: 7.0mm

• Fifth position: G: 5.9mm, D: 7.2mm, A: 7.1mm, E: 7.0mm

• Major third position: G:5.2mm, D: 5.6mm, A:5.7mm, A: 5.6mm

• Semitone position: All about 2mm

No buzzing, except from the E string against the end of the fingerboard when stopped in high position and bowed hard far too close to the end of the fingerboard.


Rgds



Fingerboard curvature (across the fingerboard)
Hard to measure and define with the strings in place. However, I could do measurements from a straight edge above the strings??