| 释义 |
hexode, a. and n.|ˈhɛksəʊd|
[f. Gr. ἕξ six + ὁδός way, path.]
A. adj. Electr. Telegr. Of six ways: applied to a mode of multiplex telegraphy, whereby six messages can be transmitted simultaneously.
1886W. H. Preece in Jrnl. Soc. Telegr.-Engin. & Electr. XV. 231 A two-way mode of working, or a mode by which two messages are practically sent at the same time, will be diode working, three-way triode, four-way tetrode, five-way penthode, and-six way [sic] hexode. 1894Preece in Times 27 Jan. 4/3 The multiplex system of working of Mr. Delany, by which, with ‘hexode’ working, six messages could be transmitted simultaneously.
B. n. Radio. [a. G. hexode]. A valve with six electrodes. Also attrib. or as adj.
1933Electronics Mar. 76/2 The special tube which was selected..is a hexode..having a fourth grid and a redesign of all the grids. 1933Pract. Wireless 27 May 358 (caption) Superhet circuit employing new Hexode single valve frequency changer. 1944Electronic Engin. XVII. 60/1 In hexode valves the mutual conductance between the first grid potential and the anode current varies in a linear manner with the voltage applied to the third grid. 1955J. Thomson Electronics vi. 90 The simplest practical form of mixer valve, but one which is not much used nowadays is the hexode. Ibid. 91 The hexode may be regarded as a screen-grid tetrode with two control grids. |