| 11. | The Champ had only one power tube.
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| 12. | The highest-power tube currently available is the Eimac, a forced water-cooled power tetrode capable of dissipating 2.5 megawatts.
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| 13. | For the Epitaph tour, he switched to using Engl Invaders that are modified to use 6L6 power tube.
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| 14. | An alternative solution for power applications is the beam tetrode or " beam power tube ", discussed below.
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| 15. | Although the envelope is typically glass, power tubes often use ceramics, and military tubes often use glass-lined metal.
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| 16. | Later developments produced beam power tubes which were capable of high-power output at frequencies extending into the UHF region.
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| 17. | They use two 5881 / 6L6GC power tubes, a GZ34 tube rectifier and are rated at roughly 40 watts.
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| 18. | The operating lifetime of a triode is about 2000 hours for small tubes and 10, 000 hours for power tubes.
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| 19. | Instead of the usual EL84 power tubes, the Valpreaux employs either two or four of the semi-obscure "'6973 "'power tube.
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| 20. | Instead of the usual EL84 power tubes, the Valpreaux employs either two or four of the semi-obscure "'6973 "'power tube.
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