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The blinking turn signal on some motor vehicles is generated by a simple relaxation oscillator powering a relay.
The blinking turn signal on some motor vehicles is generated by a simple relaxation oscillator powering a relay.
A vacuum tube Abraham-Bloch multivibrator relaxation oscillator, France, 1920 (small box, left). Its harmonics are being used to calibrate a wavemeter
A vacuum tube Abraham-Bloch multivibrator relaxation oscillator, France, 1920 (small box, left). Its harmonics are being used to calibrate a wavemeter (center).
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Crystal oscillator
Crystal oscillator
A 120 MHz oscillator from 1938 using a parallel rod transmission line resonator (Lecher line). Transmission lines are widely used for UHF oscillators.
A 120 MHz oscillator from 1938 using a parallel rod transmission line resonator (Lecher line). Transmission lines are widely used for UHF oscillators.
Image: Ganna gjenerators M31102 1
Image: Ganna gjenerators M31102 1