The thermionic vacuum tube and its applications (1920)
Van der Bijl, Hendrik Johannes, 1887- · New York McGraw-Hill Book, Co · leaf 386
but, on the other hand, the oscillation coil ofthe oscillator forms part of the antenna, and therefore the fre- DETECTION OF CURRENTS WITH THE VACUUM TUBE 363 quency of the wave radiated changes with slight changes in theinductance of this coil. A system which is not subject to this disadvantage is… … Fig. 217. The oscillator 0 may be a vacuum tube oscillator giving the radiocurrent at the desiied frequency. The voltage obtained from thisgenerator and the speech voltage obtained from the transmitterare both impressed on the modulator M. This part of the systemdoes not have to handle large…
Telegraph, Wireless
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