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■ Switching the 4th Lever Function
F/B b Double Horn
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The Yamaha double horn is designed so that it normally plays in the key of F (open F) when the 4th lever is not
depressed, and in the key of B b when the 4th lever is depressed. However, by re-configuring the linkage as shown
in the illustration below, this function can be reversed so that the horn plays in B b (open B b ) when the lever is
not depressed, and in the key of F when the lever is depressed.
To use this setup, move the string and the string seat, then place the string over the string seat.
String Stopper
Screw B
Rotor Stem Screw
Lever Linkage
Adjusting the Rotary String and the Lever Function
String Stopper
Screw A
Open F
Open F
Open B b
The YHR-567/567D is used in the illustration.
The YHR-668/668D is used in the illustration.
Open B b
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