Vented valves not venting
Posted: Tue Sep 23, 2025 7:45 am
I recently acquired a 10-year-old Miraphone 291 with vented valves. 3 of them work as they should, but 2 do not. On the 3 working valves I can see the valve cover the vent hole when I press the valve, but I don't see that on the first and third, so I'm led to believe that the vent hole is plugged on those valves. I'm tempted, but hesitant, to stick a small wire in the hole to dislodge the suspected plug. Doing so would push any substance into the valve chamber, which hopefully would just fall through the horn, but I do worry a bit about it causing trouble in the valve chamber. I would appreciate any insight into this. Thanks!