Wireless Telegraphy and Telephony

Publication of the People’s Commissariat of Posts and Telegraphs. Nos. 5–7. Nizhny Novgorod. 1919–1920.
Radio Technician. Nos. 7–12. Nizhny Novgorod, 1919–1920.

Both journals are published with the closest participation of the staff of the Nizhny Novgorod Radio Laboratory, under the editorship of Prof. V. K. Lebedinsky.

At the present time an almost regular publication schedule has been established for both journals.

The greatest attention is drawn by the numerous works of M. A. Bonch-Bruevich in the field of research into, and the construction of, cathode relays. The author has succeeded in building high-power cathode relays (up to 1 kW), which is a serious technical achievement. He has also developed a theory for calculating cathode relays. The Laboratory’s workshop is manufacturing low-power amplifier tubes in considerable quantity.

A generator with a high-power cathode relay enabled Bonch-Bruevich to carry out radiotelephony over a distance of several hundred versts.

A considerable number of both original and translated articles in all issues of T. and T. B. P. and Radio Technician are devoted to the development and improvement of various systems of generators and amplifiers with cathode lamps. In recent years this field has come to play a principal role in radio engineering and, by means of the technique and improvement of “tube” devices, is gaining currency in physical research. Thus Barkhausen, with the aid of an amplifier, succeeded in “hearing” the flight of electrons and the process of magnetization of iron (Phys. Zschr., September 1919). Widdington developed a special method for determining the charge of ions from their mass by the period of oscillations in a tube generator. (Radio Reviews, 1919).

We should note the article by V. K. Arkadiev (T. and T. B. P., No. 7), presenting a summary of the work of the author and his collaborators on the question of the magnetization of bodies in a constant and alternating field in connection with the application of this work to practical problems of electrical engineering; these works had in part already been printed, and in part appear here anew.

A special mathematical method allows the author to treat the question of calculating open magnetic circuits in an entirely convenient way. Thus—

Of particular interest are the first published results of Vvedensky’s work, who showed that, with very thin wires, the retarding influence of Foucault currents on magnetization disappears and only a lag remains, determined by the internal crystalline structure of the substance, and not by its dimensions and form; namely, in iron the magnetism falls to half its initial value in a time from \(0.4 \cdot 10^{-6}\) sec. to \(2.2 \cdot 10^{-6}\) sec., depending on the magnitude of the magnetization. These conclusions provide rich material for the theory of magnetization.

Not being able to dwell in detail, let us point out that various issues of both journals have printed a number of interesting works (for example, Nikitin’s work on the influence of metal screens on the period and energy of oscillatory circuits, Bazhenov’s on directed radio telegraphy, etc.).

S. Rzhevkin.