Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 193
VARIABLECONDENSER REttlO Q->CORD P05T5 … SWITCH FiG. 3,121.—Marconi wave meter. This includes an electric glow lamp and a detector, butgenerally the lamp is short circuited by a switch. Beside this glow lamp the wave meterincludes a variable condenser, crystal detector, pair of telephone receivers and an induct-ance. The latter is…
Electrical engineering
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