![Figure 3 from An Implement 1.5 MHz of Induction Heating for Aluminum Based on Vacuum Tube Oscillator Circuit | Semantic Scholar Figure 3 from An Implement 1.5 MHz of Induction Heating for Aluminum Based on Vacuum Tube Oscillator Circuit | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/86c8ea8ad9e35476f53892b246a344d7131c3086/2-Figure3-1.png)
Figure 3 from An Implement 1.5 MHz of Induction Heating for Aluminum Based on Vacuum Tube Oscillator Circuit | Semantic Scholar
![analog - Converting old relaxation oscillator vacuum tube circuit to a more modern circuit? - Electrical Engineering Stack Exchange analog - Converting old relaxation oscillator vacuum tube circuit to a more modern circuit? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/vdFqt.png)
analog - Converting old relaxation oscillator vacuum tube circuit to a more modern circuit? - Electrical Engineering Stack Exchange
![The Bell System technical journal . + B smj—. Fig. 48.—Typical Blocking- Oscillator Circuit Forms. tube and a transformer feedback circuit. This form may be described as anoscillatory vacuum tube circuit where The Bell System technical journal . + B smj—. Fig. 48.—Typical Blocking- Oscillator Circuit Forms. tube and a transformer feedback circuit. This form may be described as anoscillatory vacuum tube circuit where](https://l450v.alamy.com/450v/2crwedw/the-bell-system-technical-journal-b-smj-fig-48typical-blocking-oscillator-circuit-forms-tube-and-a-transformer-feedback-circuit-this-form-may-be-described-as-anoscillatory-vacuum-tube-circuit-where-the-grid-circuit-is-so-arranged-to-bedriven-negative-after-one-or-more-cycles-of-operation-this-results-in-anintermittent-oscillation-and-the-production-of-nonsinusoidal-wave-formssimilar-to-those-produced-by-the-general-multivibrator-circuits-previouslydescribed-the-basic-advantage-of-the-blocking-oscillator-circuit-form-is-oneof-economy-of-vacuum-tubes-and-attendant-power-supply-re-2crwedw.jpg)
The Bell System technical journal . + B smj—. Fig. 48.—Typical Blocking- Oscillator Circuit Forms. tube and a transformer feedback circuit. This form may be described as anoscillatory vacuum tube circuit where
![Diagram of the RF oscillator. T oscillating pentode (vacuum tube), L 1... | Download Scientific Diagram Diagram of the RF oscillator. T oscillating pentode (vacuum tube), L 1... | Download Scientific Diagram](https://www.researchgate.net/publication/268518797/figure/fig7/AS:668699870638087@1536441881334/Diagram-of-the-RF-oscillator-T-oscillating-pentode-vacuum-tube-L-1-L-2-air-core.png)