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Magic Eye Winker
T
threeneurons
20 Views • Nov 10, 2008
Description
Magic Eye Winker. Uses a EM81 (6DA5) tuning indicator tube. The triode section of this tube is wired as a phase-shift oscillator. The oscillating frequency is low (~1Hz), so that the waveform opens and closes the eye at a visible rate. Its "all tube" and contains no semiconductors. A 6AL5 is used for the power supply rectifier.
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