The first two pictures show the horn as received by the school. This is a Caravelle Compensating Horn in F by Getzen. The design of this horn was intended to help students that are ready to step up from a single horn but have a difficult time holding a true double horn.
Here you can see the mechanical linkage and the fourth valve.
The first step is to disassemble the horn and to perform a thorough pre-cleaning in order to facilitate the chemical cleaning process.
The next two pictures show the horn completely clean and ready for dent work. The removable bearing plates all fit tightly but it will be necessary to remove the end play and to also remove lateral play around the long spindle.
There are a lot of dents on this horn. Here you can see the tuning slides and all of the dent work that will be necessary.
Removing dents in the horn can be challenging. It is difficult to reach each spot and several different methods must be used. I removed the finger hook in order to properly restore the dented section of brass underneath and in the next photograph you can see how I unsoldered the ferrule in between the bell and first branch in order to access the other dents.
Once all the dent work was finished I polished and reassembled the horn. In these pictures you can see the horn dent free with the finger hook reattached. The ferrule that held the first branch to the bell section cracked when removing, but a new piece of brass tubing, with a little shaping provided a quick fix. I cleaned out the case and did a final play test. The last picture shows the horn ready to be returned to the customer.
