Restoration

Doubt regarding tuning pins during string replacement

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Started by

Musick

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Opening post by Musick

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Good evening,

Today I had some steel strings replaced (9 in total) on my 3/4 grand piano because they were buzzing and had lost a good 30% of their sonic performance. Perhaps this will continue until all of them are changed, but the difference is already very noticeable.

The buzzing has been resolved and the sound is much more harmonic, but there is some slight coplanarity issue (in my opinion) because the impact on the forte in some keys gives a negative effect (which was also present before, along with the disharmony of the steel which is now kaput), especially when rebouncing (I believe that when the hammer returns to strike the string again, it comes into contact with one of the trio that vibrates more than the others)

Wasn't the hitch pin supposed to be replaced as well? I am talking about minimal differences, on the order of tenths of a millimeter, I wouldn't know how to quantify precisely (4, 5?)

It doesn't go away despite having retuned them a little while ago so that they could settle.

Thanks in advance..

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Reply 2 by pianoexpert

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Generally, one proceeds to restore the flatness of the strings using the appropriate tool and hook. Then you must verify by gently lifting the hammer against the string, ensuring that if the three strings are plucked, they result in a "stopped" sound.

Reply 3 by Historical author

Hello,

Watch out for a detail that can make a difference.

In the case of a double string made of spun strings, both strings must be replaced; by replacing only one of the two, there will be significant sonic differences!!

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Reply 4 by pianoexpert

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Bravo James... I had overlooked this important detail.... but I believe that our friend, who seems very attentive to me, knows it well....

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Reply 5 by Musick

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Thanks for the reminder! I will update you.

Another thing I noticed is some "single" copper strings with a different knot, Italian instead of French, and I will have to have those changed as well.

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Reply 6 by pianoexpert

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If they bother you visually, yes, but as James well remembers, you must change the pair if they are duplex strings

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