Larry Jellison states:
I quit playing Kopprasch several years ago because I
thought the sounds coming out of my horn were
annoying, too. Never thought of blaming the bumpers.
More somberly, has there ever been a discussion on
this list of bumpers? Bumpers need to allow quiet
valve action, not
All. Cork vice rubber-vinyl compounds. I dunno. While still working as a
Toolmaker early 60s, I made up a more than lifetime batch. We were working
on a project among whose supplies was a sheet of black aerospace material
that happened to be exactly the right thickness for bumper height. Salvaged
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