| 1. | Cold cathodes sometimes have a rare earth coating to enhance electron emission.
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| 2. | Cold cathode discharge lamps use higher voltages than hot cathode ones.
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| 3. | Most ion gauges come in two types : hot cathode and cold cathode.
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| 4. | His early experiments were with Crookes tubes, a cold cathode electrical discharge tube.
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| 5. | They come in two types : hot cathode and cold cathode.
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| 6. | Both hot cathode and cold cathode type devices are encountered.
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| 7. | The cold cathode system was installed in a number of gold mines and worked reliably.
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| 8. | Cold cathodes may also emit electrons by photoelectric emission.
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| 9. | This is in contrast to a cold cathode which does not have a heating element.
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| 10. | Crookes tubes are cold cathode tubes, meaning that they do not have a heated pascal ).
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