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adjusted airplane alternating current alternating emf amplification factor amplifier amplitude antenna circuit atoms audio audio frequency battery capacitance Chapter circuit LC circuit of Fig condenser conductor connected constant counter-electromotive force coupling cuit current flowing curve of Fig damped wave decrease decrement detector direct current discharge distance effect electric charge electromagnetic energy electromotive force electrostatic field equal explained free electrons frequency alternating current frequency F grid circuit grid potential high frequency alternating increase inductance coil internal plate resistance latter loop antenna magnetic field maximum method microphone modulation motion natural frequency negative resistance obtained operating point oscillatory circuit plate current plate potential produce quency radiation radio frequency reactance resonance curve result rotor seen shown in Fig shunted space spark gap suitable three-electrode vacuum tube tion transformer transmitting circuit tube circuit tuned undamped oscillations undamped wave variations varied vibrations voltage wave length wavemeter wire zero
Page 144 - ... where e is the base of the natural system of logarithms, and where i is a rate of interest to be defined in Section III and IV.
Page 23 - The practical unit of capacitance is the farad, which is the capacitance of a condenser which will store one coulomb when the potential difference across its terminals is one volt.
Page 15 - ... that we join together the two distinct forms of protoplasm, the nucleus and the cytoplasm, albeit in the correct proportions, for no protoplasm is thus formed which has the property of life. While other chemical compounds can be formed by combining their elements in the correct proportions, (eg one molecule of water is made up of one atom of oxygen and two atoms of hydrogen) the life-giving matter which is the main constituent of a human being's body can in no way be brought into existence by...
Page 74 - ... applies to all condensers of this type. This scale has been calculated and is given in Fig. 135. It is calculated to fit equation (108), for observations on both sides of resonance, and not for equation (105). This scale may be used on any condenser with semicircular plates. The scale may be cut out and trimmed at such a radius as to fit the dial and then affixed to the condenser with its O point in coincidence with the graduation which corresponds to maximum capacity.
Page 148 - Brcos6rNrdr rotations for the two-way path, (1) 222 ' where e and m are the charge and mass of an electron, c is the velocity of light and / the frequency of the radio waves.
Page 31 - The resistance of a conductor varies directly with its length and inversely with its cross-sectional area or square of its diameter. ^ r...
Page 36 - The result of such an impulsive force depends not only on the magnitude of the force but also on the duration of the action, even if this is very short.
Page vii - FOREWORD I am greatly pleased with the manuscript of " Radio Engineering Principles" and recommend it as a work which brings the study of this important subject up to date. It covers fully and clearly without too great use of mathematics, the theory involved in the wonderful developments in the Art of Radio Communication made during the war, except for certain reservations which it is not possible to release at this time.
Page 146 - I passing from the filament to £ / the plate, there are at any instant a number of electrons in the space between the filament and the plate. These electrons all move toward the plate and are absorbed by it, but, at the same rate, new electrons are emitted by the filament so that the number of electrons present at any moment in the space between the...