hexodeadj.n.
/ˈhɛksəʊd/, U.S. /ˈhɛkˌsoʊd/ A. adj.
Telegraphy. Of six ways: applied to a mode of multiplex telegraphy, whereby six messages can be transmitted simultaneously.
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society > communication > telecommunication > [adjective] > types of system
multiplex1873
quadruplex1874
diplex1878
sextuplex1879
simplex1884
diode1886
hexode1886
tetrode1886
triode1886
octuplex1893
selective1906
quadded1914
multiplexed1964
muxed1991
1886 W. H. Preece in Jrnl. Soc. Telegraph-engineers & Electricians 15 231 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.
1894 Preece 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. [ < German hexode] . A valve with six electrodes. Also attributive or as adj.
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the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > thermionic valve > [noun] > vacuum tube or thermionic valve
vacuum tube1859
trigger tube1894
audion1906
pliotron1915
diode1919
electron tube1919
negatron1919
pentode1919
power valve1919
tetrode1919
triode valve1919
magnetron1921
bright emitter1923
peanut valve1923
peanut1924
power tube1924
multiple valve1929
thyratron1929
heptode1932
hexode1933
pentagrid1933
acorn tube1934
octode1934
triode-pentode1936
triode-hexode1937
transitron1939
trochotron1947
steering diode1957
1933 Electronics Mar. 76/2 The special tube which was selected..is a hexode..having a fourth grid and a redesign of all the grids.
1933 Pract. Wireless 27 May 358 (caption) Superhet circuit employing new Hexode single valve frequency changer.
1944 Electronic Engin. 17 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.
1955 J. Thomson Electronics vi. 90 The simplest practical form of mixer valve, but one which is not much used nowadays is the hexode.
1955 J. Thomson Electronics vi. 91 The hexode may be regarded as a screen-grid tetrode with two control grids.
This entry has not yet been fully updated (first published 1898; most recently modified version published online March 2022).
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adj.n.1886