41. Tetrode transistors ( whether bipolar junction or field-effect ) do not exhibit improvements of such a great degree.42. They usually had two type 48 power tetrodes that could operate with B + voltages as low as 28 volts. 43. Gerard van Tetrode donated land in 1310 in the centre of Haarlem to build St . John's monastery. 44. The pentode was invented in 1926 by Bernard D . H . Tellegen and became generally favored over the simple tetrode . 45. In other tetrodes one of the grids is a control grid, while the other may have a variety of functions. 46. To produce the short pulses of signal, the transmitter consisted of Hartley oscillators feeding a pair of tetrode amplifier tubes. 47. When a tetrode or pentode is used, the screen grid voltage is usually about one-half the plate voltage. 48. In 1912, Tetrode developed the Sackur Tetrode equation, a quantum mechanical expression of the entropy of an ideal gas. 49. In 1912, Tetrode developed the Sackur Tetrode equation, a quantum mechanical expression of the entropy of an ideal gas. 50. In 1926, Philips invented a technique of adding yet another grid to combat the secondary emission that the tetrode suffered from.
