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Single-tube audio oscillator c. 1946 – Preservation Sound
https://www.preservationsound.com/2012/12/single-tube-audio-oscillator-c-1946/
Download a four-page article from RADIO NEWS, November 1946, containing data and plans for constructing a surprisingly simple tube audio oscillator. Author is R.W. Ehrlich. One 6SN7 tube plus a handful of caps, resistors, and pots (oh and a power supply). 12 of these would make the basis of a pretty interesting synthesizer.
Audio Oscillator | Discrete Semiconductor Circuits ...
https://www.allaboutcircuits.com/textbook/experiments/chpt-5/audio-oscillator/
It is a simple, free-running oscillator circuit timed by the sizes of the resistors, capacitors, and power supply voltage. Unfortunately, its output waveform is very distorted, neither sine wave nor square. For the simple purpose of making an audio tone, however, distortion doesn’t matter much.
Classic Vintage Vacuum Tube Oscillator - Gadgetronicx
https://www.gadgetronicx.com/vintage-vacuum-tube-oscillator/
The frequency range table of Vacuum tube oscillator is 4.7Mohm / 180pF – 560pF / switch 1 and 2 from left to right / 60Hz – 188Hz 1.5Mohm / 180pF – 560pF / switch 4 and 5 from left to right / 188Hz – 590Hz 470k / 180pF – 560pF / switch 5 and 6 from left to right / …
LC Oscillators in Radios - Electronixandmore.com
https://www.electronixandmore.com/resources/lcoscillator/index.html
A vacuum tube (or a solid-state equivalent such as a FET) is used to keep this LC circuit oscillating. The advantage of using a vacuum tube is that they can oscillate at specified frequencies such as a thousand cycles per second. There are several different types of …
OSCILLATORS - World Radio History
https://worldradiohistory.com/Archive-Courses/DE-FOREST/RRT-8.pdf
Electron tube oscillators tive (or resistance) elements, in which the oscillations are pro- duced, and (3) A switch (or its equivalent) that controls the period during which the d -c power is suppled to the a -c circuit. Square -wave generator -a non -sinusoidal oscillator that develops a …
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