| 1. | This resulted in the Fokker-Tetrode-Schwarzschild action integral.
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| 2. | See Gibbs paradox for a derivation of the Sackur Tetrode equation.
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| 3. | But in older transmitters tetrodes or klystrons are also utilized.
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| 4. | The beam tetrode was also developed as a high power radio transmitting tube.
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| 5. | The Sackur Tetrode equation for entropy can be derived in information theoretic terms.
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| 6. | Some tubes described as pentodes are actually beam tetrodes.
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| 7. | During the period 1913 to 1927, three distinct types of tetrode valves appeared.
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| 8. | This results in the extensive Sackur Tetrode equation for entropy, as derived next.
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| 9. | In the dynatron a tetrode tube is used.
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| 10. | Activity recorded on a tetrode is seen on only one of the four recording wires.
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