UEDIN · 3882
Valveless helicon. Nominal pitch: 13-ft E♭.
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Description
Trompe basse. Technical description: Brass, similar to a helicon but without valves. 1¾ coils; ligature tuning at mouthpipe; fitting for music card holder; gusset in bell. Overall size: 860; corpus diameter c 580; bell 287. Sounding length: minimum 4079 including estimated 100 for mouthpipe. Bore: instrument body at c 45mm from mouthpipe receiver (local minimum bore), 11.1; m.t.s. at c 273mm from mouthpipe receiver, tuning slide bore 13.8; 2040mm from bell end, c 20.1; c 1655mm from bell end, 28.4. B = 0.48. Dia of mouthpiece receiver: ligature fitting for missing mouthpipe internal diameter 12.7. Inscribed on bell "1" (inverted) / musical motif of treble clef and notes C4, E4, G4 / "MILLEREAU / BREVET / Fr. du Conservatoire de Paris / Médailles d'Or d'Argent / Diplômes d'Honneur / 66. RUE D'ANGOULÈME / PARIS."; on edge of bell in large individually stamped letters "C A P 1". Mouthpipe (ligature fitting) missing. Circular pad with solder remnants on bottom coil indicates a fitting now missing, of purpose unknown, previously repaired. Specific literature references: Vichy auction catalogue 13.6.98, lot 203.
Measurements
860; corpus diameter c 580; bell 287.