Thermionic Tubes in Radio Telegraphy And Telephony
Thermionic Tubes in Radio Telegraphy And Telephony
John Scott Taggart
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Meikle, which utilises the device as a full- wave rectifier. The same class of circuit may be employed when high vacuum valves are used. The secondary winding T 2 of a step-up transformer T X T 2 is connected as shown to the two plates P x and P 2 . A tapping M is also taken from the midway point of the winding T 2 . Two output terminals Y and Z may be connected in the anode circuit of a C. W. Transmitter. The winding Tj is connected to a source of alternating current, the voltage AC. SUPPL FIG.... 268. Meikle's gas-filled full- wave rectifier. D. C. OUTPUT FIG. 269. Rectifying unit employing full-wave rectification. of which is stepped up by T X T 2 and rectified by the double anode valve Vi. The action of the circuit is as follows : Suppose that a half-cycle of alternating current has been induced in the winding T 2 . Let us suppose that the half -alternation has set up an E. M. F. Of 2, 000 volts across T 2 and that the end Ej is positive and the end E 2 negative. The point Ej will be positive while E 2 will be negative with respect to M.
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