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Updated: June 8, 2025
"That is quite another story," smiled the boy's tutor, "and such a long one that were I to tell it to you now it would mean you would get no sailing or swimming to-day." Instantly Dick was on his feet, Leyden jars and inductance coils forgotten. "We'll cut it out then," he laughed. "Who is for a swim? I'll race any man to the bath-house!" And off he went at top speed.
The two chief features as far as the parts are concerned of this long wave length receiving set are the variable condensers, and the tuning inductance coils. The variable condenser used in series with the aerial wire system has 26 plates and is equal to a capacitance of .0008 mfd. which is the normal aerial capacitance.
Inertia is that property of a material body that requires time and energy to set in motion, or stop. Inductance is that property of an oscillation circuit that makes an electric current take time to start and time to stop. Because of the inductance, when a current flows through a circuit it causes the electric energy to be absorbed and changes a large part of it into magnetic lines of force.
The resistance of a circuit to high frequency currents is generally found in the spark gap, arc gap, or the space between the electrodes of a vacuum tube. The unit of resistance is, as stated, the ohm, and its symbol is R. The Effect of Capacitance, Inductance and Resistance on Electric Oscillations.
But if you vary the inductance of the one loop so that it is larger or smaller than that of the other loop no spark will take place in the second circuit.
The great advantage of using an oscillation transformer instead of a simple inductance coil is that the capacitance of the closed circuit can be very much larger than that of the aerial wire system. This permits more energy to be stored up by the condenser and this is impressed on the aerial when it is radiated as electric waves. How Receiving Set No. I Works.
The resistance of a circuit to high frequency currents is generally found in the spark gap, arc gap, or the space between the electrodes of a vacuum tube. The unit of resistance is, as stated, the ohm, and its symbol is R. The Effect of Capacitance, Inductance and Resistance on Electric Oscillations.
Under the sub-caption of Self-induction and Inductance in the beginning of this chapter it was shown that it was the inductance of a coil that makes a current flowing through it produce a strong magnetic field, and here, as one of the constants of an oscillation circuit, it makes a high-frequency current act as though it possessed inertia.
The great advantage of using an oscillation transformer instead of a simple inductance coil is that the capacitance of the closed circuit can be very much larger than that of the aerial wire system. This permits more energy to be stored up by the condenser and this is impressed on the aerial when it is radiated as electric waves. How Receiving Set No. I Works.
Tuning coils, sometimes called transmitting inductances and oscillation transformers, are of various types. The simplest kind is a transmitting inductance which consists of 25 or 30 turns of copper wire wound on an insulating tube or frame.
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