Whistling piston valves
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- lurker
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Whistling piston valves
I recently ran into a problem with my BMB J765LQ tuba where the 1st and 2nd valves are whistling whenever I press them down. Thoughts on this?
King 2350 sousaphone
Getzen G50 CC 5V
Schilke 69C4/Mike Finn MF5
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Getzen G50 CC 5V
Schilke 69C4/Mike Finn MF5
Follow me on Instagram @Basses_oasis
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- 5 valves
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Re: Whistling piston valves
It really depends on whether or not they can carry a tune.
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- 3 valves
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Re: Whistling piston valves
Yes. Check your ventilation holes in the bottom caps , and stem hole in top caps. If they have sharp rims or edges, it might help rounding them a bit. Air is pressed through them when moving the pistons, and since these holes are relatively small compared to the diameter of the pistons, air speed there is high, resulting in whisteling over their edges.
Smuthing edges round will help, eventually drilling them a tiny bit larger too.Best done in a turning lathe, so ask your repair man to do it.
And make sure that the ventilation holes in the pistons are not clogged either. ..
Smuthing edges round will help, eventually drilling them a tiny bit larger too.Best done in a turning lathe, so ask your repair man to do it.
And make sure that the ventilation holes in the pistons are not clogged either. ..
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Meinl-Weston 2141 Eb 5v FA tuba
Hirsbrunner Bb 3v TA compensated euph
Wessex Dolce Bb 3+1v TA compensated euph
Alto/tenor/bass trombones in various sizes/plugs