When a vintage Conn 88H Trombone, the ‘Maestro’ of symphonic brass, arrived at the workshop in a shocking state, it was an immediate call to action. While our partner Russ—a dedicated 88H owner since 1974—felt the visceral shock of seeing a legend so severely compromised, the technical challenge was passed straight to Paul. The Conn 88H represents a gold standard in large bore tenor trombones, and restoring its sonic integrity demands not just care, but an absolute mastery of brass mechanics. The primary goal was clear: return this instrument to a condition that met the exacting benchmark of Russ’s own cherished 1974 model.

The damage required a methodical, detailed approach far beyond simple hammering. Paul initiated the restoration by meticulously assessing the extent of the bell section and tuning slide deformation. Using highly calibrated dent balls, specialized steel mandrels, and proprietary dent rollers, the process of coaxing the metal back into its precise acoustic shape began. This is where professional workshop precision is non-negotiable; improper dent work can subtly shift the taper, resulting in intonation issues and a choked sound. Every motion was calculated to release stress from the heavily creased brass without thinning the metal walls.

The technical depth of this repair involved significant slide and bracing alignment. The 88H is renowned for its smooth rotor mechanism and F-attachment alignment, which must function flawlessly. Paul focused crucial attention on the outer slide tubes and the critical alignment of the rotor assembly ferrules. Using specialized alignment gauges, the dents were rolled out and burnished from the delicate slide tubes, ensuring minimal friction and maximizing the hermetic seal. This meticulous realignment of the slide mechanism is key to achieving the legendary responsiveness that Conn 88H players demand.

The final result showcases the transformative power of master craftsmanship. The severe creases and structural dents were seamlessly ‘ironed out,’ restoring the instrument’s aesthetic beauty and, more importantly, its acoustic functionality. Our commitment is to instrument restoration that honours the vintage heritage while ensuring modern performance standards are met. If you own a treasured vintage brass instrument, whether a Conn, Bach, or Greenhoe, trust the technical experts who understand the anatomy and legacy of these incredible machines. Bring your instrument to the workshop where every detail counts.