21. Similar design strategies are used in the construction of large ceramic power tetrodes used in radio transmitters. 22. The " tetrode " description, though accurate, does not replicate the vacuum-tube tetrode. 23. The " tetrode " description, though accurate, does not replicate the vacuum-tube tetrode . 24. Which, for ? = 3 / 2 is simply a restatement of the Sackur Tetrode equation. 25. From the definition of the thermal wavelength, this means the Sackur Tetrode equation is only valid for 26. However, tetrodes are successfully used into the VHF range and triodes into the low GHz range. 27. All these models employed output transformers and beam tetrode or pentode tubes ( for increased efficiency ). 28. Post-Williamson, most commercial amplifiers have used tetrodes in the " ultra-linear " configuration. 29. Elisabeth van Tetrode was the grandmother of the Leiden-born painter Rembrandt ( 1606-1669 ). 30. An alternative solution for power applications is the beam tetrode or " beam power tube ", discussed below.
