To save our 'PETROF', (broken strings of upright piano)

[maxim_tuner]

Max, a piano tuner, was called in an emergency to one of the educational in the city of Uralsk, where 'PETROF' piano's strings were episodically broken in the treble range. Such strings were not available here. Ordering them was also not possible at the time. However, Max had 'donor' treble strings from an old BECKER grand piano, which he decided to install here. Their diameter dimensions coincided. Thus, Max reinstalled it. Of course, this is rough and somewhat wrong. This is a palliative approach. From the point of view of physical phenomena, there are no obvious contradictions since the diameter of the strings corresponds. The only drawback is that a loop was made at the end of the string, which was put on a hitch on a cast-iron plate, whereas the original string was installed through a wrap (hitch). This is because in all piano designs, each individual string is arranged in such a way that its ends are fixed on two tuning pins simultaneously, and the hitch fixes it at the bottom, splitting it in half. This method does not adversely affect the sound quality, so if you don't have strings available, why not give it a try? In the clip, you can hear Max testing the piano with his own playing, and everything is not so bad after all.
Good luck,
'the one who walks will walk the road'. https://youtu.be/2mtYjw5eamY