the Martin Baritone 200132
This instrument, like so many baritones, had intonation problems. Besides, it could be supplemented a bit...
These instruments structurally have intonation problems. E2 and F2 are rather too sharp. This is caused by faults in the bore profile. There are several ways to tackle this problem. In this instrument an adaptation of the profile of the neck was choosen. A change to the profile of the upper bow is nonetheless indispensable.
graph average of four runs of measurements.
The entrance of the neck was widened over a couple of centimeters.
With the following result. E2 is still a little bit on the sharp side.
graph average of two runs of measurements.
These instruments lack the key for alternative F#.
An extra tonehole ring, a hinge and a spring seat were soldered on to the body..
...in the upper end a tone hole or two could be added as well...
...and be equipped with keys.
The final layout for the right hand. The instrument now goes up to G3. Both keys act entirely independently.