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Hi-
Does anyone have a copy of the installation instructions for the optional Yamaha YEP 321 Euphonium 5th valve? I am working on a horn project, and would appreciate it if anyone had the info on installing the 5th valve--email me directly at: jonestuba@Juno.com

Many thanks!
Regards-
mark
jonestuba@juno.com

What would the fifth valve be used for ?

Hi-
The 5th valve on the Yamahas was used for the low B and for improved intonation since the Yamaha 321 is a non compensating instrument.
Regards-
mark
jonestuba@Juno.com