ScienceHackadayabout 15 hours ago
Mechanical TV, Without The Benefit Of New Parts
2 min read
Paul Kocyla is building a mechanical television system using only parts available in the 1920s. The build includes a wooden chassis, period power supply, synchronous motor, and Nipkow disk. A 120 Hz hum in the amplifier was traced to early tubes with directly heated cathodes blinking at that frequency.
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