The Wireless Experimenter's Manual: Incorporating How to Conduct a Radio Club, Describes Parliamentary Procedure in the Formation of a Radio Club, the Design of Wireless Transmitting and Receiving Apparatus, Long Distance Receiving Sets, Vacuum Tube Amplifiers, Radio Telegraph and Telephone Sets, the Tuning and Calibration of Transmitters and Receivers, General Radio Measurements and Many Other Features
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adjusted aerial amateur amplifier antenna antenna circuit apparatus base battery bulbs capacitance capacity circuit closed club coil condenser connected construction copper core coupling crystal curve cycles decrement desired detector determine diameter dimensions direction effective electrodes employed equal experimenter filament formula give given grid high voltage impedance increase indicated inductance insulating leads loading loop magnetic Marconi maximum means measuring meters method mounted obtained ohms operation oscillation placed plate position potential practice primary primary and secondary radio frequency range reading receiving reception resistance resonance secondary secondary coil short shown in Fig shows shunt side signals spaced spark square station suitable switch taps telephone terminals transformer transmitter tube tuning turns valve variable vary voltage volts wave length wavemeter winding wire wireless wound
Page 39 - The effective value of an alternating current is sometimes called the "root mean square" (rms) value because the effective value of a sine wave is equal to the square root of the average of the squares of current taken at all points throughout the cycle.
Page 303 - It1, the decrement is calculated by A certain value of decrement therefore corresponds to that displacement of the condenser's moving plates which varies the capacity by the amount (Cr — C). The displacement for a given decrement will in general be different for different values of C, the total capacity .in the circuit. At each point of the condenser scale, therefore, any displacement of the moving plates which changes the square of current from /r2 to - /r2 means a certain value of (8
Page 298 - ... series with the antenna or in series with Ll, Cl, Rl. U is a source of undamped oscillations — a Marconi VT connected up for the production of radio frequencies. D is a damped oscillation spark set, the spark gap having magnesium electrodes. Switch S-2 connects L-2 to either source. TUBE GEN.
Page 16 - The Commercial Tribune" in selling out to and supporting the Democratic ticket be, and the same is, hereby denounced. - "2. That it shall be the duty of the members of this committee to ascertain what, if any, Republicans subscribe to or patronize "The Commercial Tribune...
Page 38 - It is now clear that a direct current, the square of which is equal to the average of the squares of an alternating current over a complete cycle, produces the same heat as the alternating current.
Page 21 - As shown, the electric and magnetic fields are at right angles to each other and to the direction of propagation of the waves.
Page 38 - ... stand at zero since the tendency is to deflect them just as much one way as the other. Alternating current voltmeters and ammeters indicate effective values and will move their pointers in the same direction regardless of the direction of the current flowing through them. The position of the pointer is proportional to the average of the squares of all the values of current during the cycle. See Wave, Sine. The effective value of an alternating current is equal to the maximum value multiplied...