This Conn 78H, built in 1964 during the Elkhart era, is presented here as an archival reference for musicians and collectors who study the classic Conn medium-bore tenor line.
The 78H is long regarded as one of Conn’s most versatile all-around tenor trombones.
This example featured an 8-inch yellow-brass bell with an unsoldered wire rim, paired with a .522-bore gold-brass hand-slide with nickel-silver end-crook — a configuration that produced a lively yet colorful sound and excellent flexibility for both jazz and classical work.
The instrument retained all original parts and lacquer.
The bell had never been creased or damaged, though it showed considerable age-related lacquer wear — spotty in places and lighter in weight than many later 78H bells, contributing to its open, resonant character.
The slide lacquer was largely intact, especially on the usual grip areas.
Slide tubes were perfectly straight, and despite a small patch of plating wear (visible in photos), the slide performed well — dropping freely under gravity and fully serviceable for serious play.
Players often appreciate the Conn 78H for its ability to “play big but not too big.”
It provides a centered tone with color and warmth, resists edgy over-blowing, and is equally at home in medium-bore jazz, wind ensemble first parts, chamber work, and even some orchestral repertoire where a full .547-bore F-attachment instrument isn’t required.
The trombone received a full shop service including chemical bath and mechanical inspection, leaving nothing further to improve.
It came with its original Conn case, still functional but showing typical age wear with duct-tape repair on the leather end — common for this vintage.
What is the Conn 78H?
The 78H is Conn’s classic medium-bore (.522) straight tenor trombone.
Introduced in the mid-20th century, it became a favorite for players needing a horn that bridges small-bore jazz models and larger symphonic tenors.
Why are Elkhart-era Conns so prized?
Conns built in Elkhart, Indiana, before production shifted in the early 1970s, are valued for their consistent craftsmanship, tonal depth, and responsive feel.
What is special about the unsoldered bell rim?
An unsoldered wire-rim bell edge allows the flare to vibrate more freely, often giving the instrument a more open and colorful sound compared with soldered-rim bells.
How does the 78H fit into modern playing?
Its medium-bore design makes it ideal for jazz lead, wind ensemble first parts, chamber music, and lighter orchestral repertoire — offering power without the weight of a large-bore F-attachment tenor.
Where can I explore more vintage Conn trombones?
🔎 Browse the Archive of Sold Instruments to see additional historical Conn models.
This Conn 78H Elkhart 1964 has been sold and is presented here as a historical reference for players and collectors.
🔎 Browse our current trombone listings to see what’s available today.
