Boogie string breaker

[Mike Kurta]

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    Esteemed Colleagues:
    A local dealer has asked this question:  He has a customer with a =
1986 Yamaha U1 studio piano.  Ever since the piano was new, bichord bass =
strings have been breaking on a regular basis, now about every sixth =
time it's played.  This problem was addressed under warranty by =
replacing all the bass strings, but it still occurs, even today.  The =
player admits to being very vigorous.  The strings break between the pin =
and pressure bar, leaving a 1 inch
stub.  Hammers?  Regulation?  Strings?  Any thoughts?  Thanks.....
    Mike Kurta

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