Have the horn instruct the tech (and owner) where it wants its heights to be set. A good tech who knows key regulation will be able to dial in the particular horn nicely.Do you guys have thoughts about the key heights for Conn NW II tenor?
Not quite, because the the relativity of the upper stack and lower stack can be adjusted by the sliding adjustment that some saxes have between the F# and Bis Keys....All of the key heights on a saxophone are determined by setting the height of one of the lower stack keys. This is usually the F or F# and by regulating and removing lost motion the other key heights are established automatically.
Agreed. My mentor taught me how to change the curvature of the arm from the Bis to take advantage of the sliding action. I have only had to do this a few times in nearly 20 years of repairing saxophones.Just one omitted point:
Not quite, because the the relativity of the upper stack and lower stack can be adjusted by the sliding adjustment that some saxes have between the F# and Bis Keys.
And for all saxes, can be adjusted by changing the angle of the arm on the Bis key (that is operated by the F# linkage), relative to the axis of the F# arm that contacts it, i.e. increasing or decreasing the sliding action involved in this linkage.
These are not good things to mess with unless one knows the effects of doing so, and it is done with a purpose.
Good point. In my study of acoustics I have learned that the diameter of the bore at any given point largely determines the diameter of the tonehole at that location. Of course there are exceptions such as the C and Bis toneholes. Marten Postma has posted some interesting data and measurements of saxophone attributes from the earliest models to the present time. Those who are interested can go to this link: http://sax.mpostma.nl/ and click "Measurements" then "Holes, Key".Also, specific key heights for one sax may not work for another, because different saxes have different venting from different sized tone holes, and that is related to the actual location of the tone holes, which is all part of the many compromises of acoustic design.
BTW another buyer and I both bought Selmer SA80 II saxes at the same time. We saw them unpacked from the Selmer shipping cartons. The difference in stack key venting was immediately visible - several mm. So it is clear that even Selmer does not care too much about venting issues.