Grootkoper

Grootkoper Onderhoud-, reparatie- en restauratieatelier voor instrumenten uit de kopergroep: sousafoon, tuba, trombone, trompet, bariton, euphonium en hoorn

This 1 year old Wilson tuba arrived on the workbench and still looks untouched after lots of playing. Untill the inside ...
03/05/2026

This 1 year old Wilson tuba arrived on the workbench and still looks untouched after lots of playing. Untill the inside visual inspection 😷. Showing before and after cleaning the 4th valve circuit. Good example why yearly preventive maintenance matters.

Euphonium leak repair
28/01/2026

Euphonium leak repair

22/12/2025
Todo: getting a Conn 36K main tuning tube operational again and get it to slide out over the body instead of against… ...
21/10/2025

Todo: getting a Conn 36K main tuning tube operational again and get it to slide out over the body instead of against…

Restoration of an oldie from the Elkhart Indiana factory
25/09/2025

Restoration of an oldie from the Elkhart Indiana factory

Looks like nothing happened 🙂
30/07/2025

Looks like nothing happened 🙂

Lower mouthpipe reconstruction time
12/07/2025

Lower mouthpipe reconstruction time

And on to the next batch of summer holiday early birds yearly maintenance jobs
10/06/2025

And on to the next batch of summer holiday early birds yearly maintenance jobs

Cleaned valves , new stems , new buttons
29/04/2025

Cleaned valves , new stems , new buttons

Spring? The right season to get these old worn adjustable spring mechanisms working properly again.
04/04/2025

Spring? The right season to get these old worn adjustable spring mechanisms working properly again.

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Dr. Ensinkstraat 43
Ossendrecht
4661EG

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