The Thermionic Vacuum Tube And Its Applications
The Thermionic Vacuum Tube And Its Applications
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The a-c. Output voltage from this tube was measured by means of a bridge arrangement shown on the right of the figure, in which the plate-filament resistance of the tube A formed one arm of the bridge. The other three arms are indicated by B, C and D. The output from the tube A\ is impressed on the grid p WVMW B A/WWW 1 FIG. 109.
of the tube A, which acts as a detector, so that small potential variations applied to its grid unbalances the bridge.
The bridge was calibrated by applying known a-c.... Voltages to the grid of tube A, and noting the deflection of the galvanometer G. The known voltage is applied, as is commonly done, by con- necting between the grid and filament of tube A, a small resistance and a thermocouple in series. The high-frequency current is passed through the resistance and thermocouple, and the input voltage is given by the known value of the resistance, and the reading is indicated by the thermocouple. In order to measure the amplification, the tube AI is inserted as shown, and the input voltage measured with resistance and thermocouple as indicated.
What to read after The Thermionic Vacuum Tube And Its Applications?
You can find similar books in the "Read Also" column, or choose other free books by H J Hendrik Johannes Van Der Bijl to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The a-c. Output voltage from this tube was measured by means of a bridge arrangement shown on the right of the figure, in which the plate-filament resistance of the tube A formed one arm of the bridge. The other three arms are indicated by B, C and D. The output from the tube A\ is impressed on the grid p WVMW B A/WWW 1 FIG. 109.
of the tube A, which acts as a detector, so that small potential variations applied to its grid unbalances the bridge.
The bridge was calibrated by applying known a-c.... Voltages to the grid of tube A, and noting the deflection of the galvanometer G. The known voltage is applied, as is commonly done, by con- necting between the grid and filament of tube A, a small resistance and a thermocouple in series. The high-frequency current is passed through the resistance and thermocouple, and the input voltage is given by the known value of the resistance, and the reading is indicated by the thermocouple. In order to measure the amplification, the tube AI is inserted as shown, and the input voltage measured with resistance and thermocouple as indicated.
What to read after The Thermionic Vacuum Tube And Its Applications?
You can find similar books in the "Read Also" column, or choose other free books by H J Hendrik Johannes Van Der Bijl to read onlineMoreLess
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