| 21. | Developed in the 1950s, these components utilized primarily vacuum tube technology.
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| 22. | In a Forbes administration, it will go the way of the vacuum tube.
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| 23. | Semiconductor devices have replaced thermionic devices ( vacuum tubes ) in most applications.
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| 24. | Initially the Laureldale Laboratory designed electron tubes ( vacuum tubes ).
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| 25. | Vacuum tubes could also be used to make superior radio transmitters.
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| 26. | In 1949 vacuum tube calculators were added to unit record equipment.
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| 27. | This, in turn, led to the development of the vacuum tube.
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| 28. | Simulator logic is all analog and is based around vacuum tubes.
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| 29. | The closest thing was testing your television vacuum tubes at the drug store.
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| 30. | "The vacuum tube had transconductance, so the transistor would have'transresistance .'
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