My Scherzer Bb trumpet with vertical push rods had a nickel silver wire shaped like a soccer goal over the cranks of the rotors to avoid the right hand palm interfering with the action. One or two of these actually might work like the wire mask of a hockey goalkeeper on rotor tubas, but they would need to be seated on flanges of some size to avoid damage on the vertical branch.rocksanddirt wrote:I wonder if there would be any value in putting a guard over the valve ends on those when sold to a school. It wouldn't have to be much to protect the valve stems from damage like that. Easier to bend a guard back into place than straighten the valve stems, correct the linkages.bloke wrote:When kids tump Miraphone 186 tubas, they always hit on the first valve stem...and after three or four tumps, the linkage (not just the 1st valve linkage) is mangled. It's the lucky school that gets their linkage back from the repair shop with a straight carriage rod and good tolerances around the paddles' hinge tubing...and (with the new carriage design), the carriages tend to (simply) break rather than (like the old ones) bend.
After straightening the first rotor stem about 7 - 8 times, they tend to break off...Then what?
Klaus





