The thermionic vacuum tube and its applications (1920)
Van der Bijl, Hendrik Johannes, 1887- · New York McGraw-Hill Book, Co · leaf 270
ontainers, we can use cooHngmeans to carry off the heat dissipated at the anode, instead of de-pending only on radiation. Cooling can be effected in several THE THERMIONIC AMPLIFIER 247 ways: The device can, for example, be immersed in a liquid bathor a blast of air can be d reeled against it. Or… … Fig. 135.—British Type Power Tube. in diameter. The bottom of this tube is closed and the top sealedhermetically to the re-entrant glass tube, thus allowing water to becirculated inside of it. The grid forms a helix round the anode,and the cathode consists of a number of filaments arranged…
Telegraph, Wireless
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