Historical Technology

Vintage Reed Frequency Meter

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The phenomenon of resonance has many examples in physics, engineering, and everyday life, and the reed frequency meter is one of them. Surprisingly, such instruments are still in use here and there, although they are certainly considered rarities today. I picked up this specimen, manufactured in 1961, for a few coins at a swap meet. … Read more

Послание В. И. Ленина (Message from Lenin)

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In 2014, the Csepel spark telegraph station turned one hundred years old. The equipment transmitted messages from both Béla Kun and Lenin. I decided that for the 105th anniversary, I would build a spark transmitter myself. Csepel spark telegraph radio station The construction of the Csepel spark telegraph radio station, which marked the beginning of … Read more