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Hello, I recently bought aYamaha E-3 Electone. It has some problems but here is the worst: when I turn the organ on, the B is always a little flat but in 15 minuntes it becomes really sharp. I tried to tune it but after some minutes it continues to sharpen. When I turn the organ off and after 15 minutes I turn it on again, the B is flat again. Can anybody help me please? Thank you very much.
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