Yamaha bass strings

[Fausto Morell]

Dear list
First I will introduce mysef, my name is Fausto Morell and I live in
Majorca Spain, I am not a piano tecnician but I am trying to give up my
present job and become one in the future. I work a few hours a week as
an apprentice with a qualified tecnician.

The question I have is for my own piano. One month ago I bought a new
Yamaha C3 and I am very happy with it except for one thing that I did
not notice when I tried the piano at the Yamaha dealer: two of the bass
notes F2 and F#2 have a very unpleasant metallic overtone.

The Yamaha tecnician tried to solve the problem by voicing the hammers
but the problen only got worse, now the notes sound duller and the
metallic overtone is even more noticeable.

Then we tried to give one of the strings a twist. After letting it off
the hinch pin the string untwisted itsef  so we gave it back those
twists plus two extra ones, the ressult after tuning was that the string
sounded dead as a brick, untwisting those two extra twists put the
string back to normal.

The problen is becoming quite an obssesion so I would apreciate any
help.

Thank you in advance and please forgive any spelling mistakes