The principles underlying radio communication (1922)
United States. National Bureau of Standards, Ould, Richard Sheldon, 1889-, United States. Army. Signal Corps · Washington, Govt. Print. Off. · leaf 200
what different. Theexciter is unnecessary, because current for the field coil ofthe alternator may be taken directly from the line. It is then ALTERNATORS FOR RADIO USE. 197 possible to combine the generator and a 110-volt, direct current,shunt motor (see Sec. 97) into a very compact unit. The… … Fig. 121.—Small 500-cycle motor-generator set (2500 r.p.m. ; 24 poleson stator ; 24 teeth on rotor; 110 volts; 3.2 amp.; 0.35 kva.). 1. Field terminals. 2. Collector rings. 3. Armature terminals. 4. Shaft of both units. design as that shown in diagram in Fig. 103, but being builtfor nearly 50 per…
Telegraph, Wireless · Radio
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