An advanced repair that I could not refuse was a very special Guitarra, a Portuguese instrument with 12 strings with tuning screws that resembles a medieval torture instrument. I had seen these in the picture and was curious about how and why they work. It came in a coffin case that was big enough for the instrument,…

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Pancake machine

I'm not the first in the family to "invent". My father, Thorsten Häggström, had a now expired patent for a pancake machine in 1992. I still remember all the good pancakes it made 🙂 Swedish patent Patent PDF English text

Pythagoras' theorem

When I measure the intonation point on the upper saddle from the back of the first band, you get a right-angled triangle with the caliper with a longer hypotenuse. By using Pythagoras' theorem, I realize that you should add 0.05-0.1 mm to the measurement I got at the measurement, as the upper saddle to be manufactured is always higher than the mm that…

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