Hobart, H. M. (Henry Metcalf), 1868-1946 ed · Philadelphia, J. B. Lippincott · leaf 353
ltube on which are wound two coils of finewire, one being connected to the aerial andto earth wires, and the other to a telephone.A magneticfield is main-tained by per-manent mag-nets whose endsare near to themoving ironwire on eitherside of thefixed coils. Asthe wire moves,this field isdeformed… … rig. 4.—Marconi Tuner A, Aerial wire. E, Eartli. B, c.Variable inductances. P, o, H, Vari-able capacities. R, Director. nected to the telephone and induce a currentwhich produces a sound in the latter. An arrangement of receiving circuits calleda tuner is used on the larger stations. Itconsists of…
Electrical engineering
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