This week I decided to upgrade my Rudy Mück trumpet a little more. If you haven’t read about this instrument in the past then take a look here for more info.
A reversed slide is one that is configured so that the smaller internal tubes are reached first along the path that air takes through the instrument. The result of this is that the internal gradient is smooth. If the air passed through a larger outer tube first and then into a smaller inner tube and then out again then, as it does in a non-reversed slide, then this can have a negative effect on the feel and intonation of the instrument. In my experience it tends to be that you feel reversed slides as an improvement in the blow of a trumpet and smoother in transition when you press the valve – but not necessarily something you first notice before the change has been made. Most beginner-model trumpets do not have reversed slides (at least not for the first valve or tuning slide) and professional models do (not always the tuning slide).
On my Rudy Mück trumpet I have reversed the first valve slide and added a hook so that it can be moved whilst playing. I have also shortened the tube by about 3mm because it has always played slightly flat on a couple of notes and I now have better control over that. The process is fairly straight-forward and only required that I had a hook to place on the tube after it was reversed. Everything else is done using pre-existing parts of the instrument. Firstly I needed to remove the top tube from the valve casing and the stay that was in between the two outer tubes. I then had to remove the inner tube from the top of the removable slide. The tricky part of the operation is making sure that the tubes are straight when replaced in the opposing position. I used a digital calliper to measure the gap between the tubes accurately to a few hundredths of a millimetre. This is necessary for the slide to be moveable whilst playing. Its remarkable the things I can now do having learnt to solder brass properly.
On the Schilke Loyalist website there are some very interesting articles, particularly one (link) that highlights why reversed tuning slides are better for over all intonation on a trumpet. At this stage I don’t intend reversing the tuning slide on this trumpet because I would have to remove a brace that I feel helps with the slotting. When this brace was removed in the past the trumpet did not sound as good as it currently does. Seeing as this trumpet is conical from the receiver to the end of the tuning slide anyway I think the change would be of less value than it would on another instrument.
Happy trumpeting! ~iii<0