Practical wireless telegraphy; a complete text book for students of radio communication (1917)
Bucher, Elmer Eustice, 1885- · New York, Wireless Press, Inc · leaf 174
ttery. RECEIVING CIRCUITS, DETECTORS, TUNING APPARATUS. 163 144. The Vacuum Valve Amplifier.—The incoming signals made audibleby the simple vacuum valve circuit shown in Fig. 179, may be amplified consider-ably by connecting several oscillation valves in cascade as per the diagram, Fig.185. The… … Fig. 187—Circuit for Cascade Ampliiication of Radio Frequencies, In the diagram, Fig. 185, in which the left-hand part of the circuit starts with the sec-ondary winding of the receiving transformer, the telephones are removed from the localbattery circuit and replaced by an iron core inductively…
Telegraph, Wireless
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