Detecting Efficiency of the Resistance Capacity Coupled Amplifier to 6000 Meters
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, 16, 274, 1920.
2 Loc. Cit.
43 6 W. C. BROMBACHER.
The change in the value of the rectified high-frequency component of the plate current of the second tube of the amplifier, designated by b, was measured by a D'Arsonval galvanometer, G, Fig. I, connected across a resistance r 4 placed in the plate circuit. R 4 was 60, 000 ohms. The galvanometer had a resistance of 9. 0 ohms and a sensibility of 5. 8 X io~ 8 amperes per millimeter deflection on a scale 125 cms. Distant. PI and P 2, Fig. I, wer...e potential dividers, PI serving to keep the plate voltage at the desired value, and P 2 to compensate for the potential drop in the resistance r 4 so that the galvanometer rested approximately at zero. When the grid voltage of the first tube was changed, a deflection of the galvanometer resulted which was proportional to the change in the rectified high-frequency component of the output plate current.
It was important that the filament currents remain constant. Any change in these currents resulted in a shift of the operating point of the tubes.
What to read after Detecting Efficiency of the Resistance Capacity Coupled Amplifier to 6000 Meters?
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To quickly assess the difficulty of the text, read a short excerpt:
, 16, 274, 1920.
2 Loc. Cit.
43 6 W. C. BROMBACHER.
The change in the value of the rectified high-frequency component of the plate current of the second tube of the amplifier, designated by b, was measured by a D'Arsonval galvanometer, G, Fig. I, connected across a resistance r 4 placed in the plate circuit. R 4 was 60, 000 ohms. The galvanometer had a resistance of 9. 0 ohms and a sensibility of 5. 8 X io~ 8 amperes per millimeter deflection on a scale 125 cms. Distant. PI and P 2, Fig. I, wer...e potential dividers, PI serving to keep the plate voltage at the desired value, and P 2 to compensate for the potential drop in the resistance r 4 so that the galvanometer rested approximately at zero. When the grid voltage of the first tube was changed, a deflection of the galvanometer resulted which was proportional to the change in the rectified high-frequency component of the output plate current.
It was important that the filament currents remain constant. Any change in these currents resulted in a shift of the operating point of the tubes.
What to read after Detecting Efficiency of the Resistance Capacity Coupled Amplifier to 6000 Meters?
You can find similar books in the "Read Also" column, or choose other free books by W G William George Brombacher to read onlineMoreLess
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