DescriptionTechnical description: Brass, straight; ligature tuning at mouth-pipe. R1: 1st valve, lowers 2 semitones. R2: 2nd valve, lowers 1 semitone. R3: 3rd valve, lowers 3 semitones. R4: 4th valve, lowers 5 semitones. Valve type: 4 Périnet valves, bottom sprung; alignment by key on piston.
Inscribed on bell "C" / six-pointed star / "C. MAHILLON / FOURNISSEUR / BREVETE / DE L'ARMEE / ET DES / CONSERVATOIRES / BRUXELLES" and "GASTON OOMS / 1930".
Usable pitch: B♭ at A⁴ = 440 Hz.
Overall size: 570; bell 78.
Sounding length: minimum 579.
Bore: at 30cm from moutpiece receiver (minimum bore) 9.2; at 66mm from mouthpiece receiver (distal end of ligature tuning-slide), 9.5; valve cluster at 81-183mm from mouthpiece receiver, v.t.s. bore (1, 2, 3, 4) 10.0; at 290mm from bell end, c 12.9; at c 164mm from bell end, 18.2; at 5.4mm from bell end, 57.2; B = 0.52.
Bell cutoff = 2300 Hz.
Dia of mouthpiece receiver: m.r.t. 10.5 - 9.5.
Probably supplied with mouthpiece. |