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POSTES DE T S F PHAL
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POSTES DE T S F PHAL
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Publication of FR720709ApublicationCriticalpatent/FR720709A/fr
H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
FR720709D1930-09-231930-09-23Dispositif de réglage du circuit d'accord dans les postes de télégraphie sans fil
ExpiredFR720709A
(fr)
Dispositif perfectionné de radiateur ou de collecteur d'ondes électromagnétiques pour postes, respectivement émetteurs ou récepteurs, de télégraphie et de téléphonie sans fil