Today a thumb valve spring snapped on a student’s Conn 8D during a lesson. Obviously, we had to take a break to assess what happened, and to determine if I could do the repair myself or if a trip to the repair shop was in order. While we didn’t have an identical replacement part, I was able to fashion a workable solution from existing materials, see below.
The actual replacement part looks like this (image obtained from https://bandrepairparts.com/store/brass/conn_brass/conn_frenchhorn/2185-spring/)
Not bad for a day’s work, and this should work nicely until a repair technician can replace the part. Do you have some horn DIY stories to share? Feel free to comment below!