SU6901A1 - Device for controlling the frequency of the cathode generator - Google Patents

Description

The proposed device aims to maintain a constant frequency of the emitted waves, especially when operating with short waves.

FIG. 1 and 2 are diagrams of the device according to the invention and FIG. 3-curves of the resonance of the transmitter circuit; FIG. 3 shows the frequency curve for the resonant circuit I on the left side, and the frequency curve for the antiresonant circuit I / on the right side.

Frequency control is performed by changing - the voltage on the grid of a special three-electrode cathode lamp Lr (Fig. 1) so as to change its conductivity upwards if the oscillation frequency of the transmitter for some reason decreases and, conversely, so that the conductivity of the lamp Lr decreases if the oscillation frequency of the transmitter has increased. The lamp Lr is connected in parallel to several turns. any of the self-induction coils included

into the oscillatory circuit of the transmitter, regardless of the chosen transmitter circuit. FIG. 1 shows an example of shunting a Lr lamp to a part of a self-induction coil in a grid of a lamp generator. When the voltage on the grid or the conductivity of the grid of the grid lamp Lp is changed, the coefficient of self-induction of the coil to which this lamp is parallel is changed, and therefore the length of the emitted wave will change. To appropriately apply the voltage to the grid of the lamp. A resonant I (Fig. 1) or an antiresonant I / (Fig. 2) circuit is used with the least possible attenuation; this circuit is in some way associated with the transmitter. The transmitter is tuned to the frequency corresponding to the midpoint of the loop resonance curve (Fig. 3); therefore, altering the transmitter frequency will cause a voltage change on the rectifier circuit F, in which any rectification method can be applied. With the help of a DC amplifier G, this voltage can be increased, and the slope of the voltage change in the function of frequency variation can also be arbitrarily increased. Instead of the usual rectification and amplification of direct current, i.e. instead of the elements F and F, a superheterodyne or similar circuit can be used to increase the current of high or intermediate frequency.

From a dc amplifier or directly from a rectifier, the resulting voltage is applied to the grid of the lamp Lr. As a result, the phenomenon proceeds as follows: when the transmitter frequency changes, the voltage in the rectifier circuit connected to the tuned resonant or antiresonant circuit changes; this voltage change is amplified in the DC amplifier and fed to the grid of the regulating absorption lamp, thereby changing the conductivity of the lamp, and the self-induction coefficient of the coil that it shunts; a change in the self-induction coefficient entails a change in the transmitter's wavelength in the direction opposite to the initial change in the wave, and the fundamental frequency is restored.

Lamp Lr can be connected not only autotransformerly, but also inductively, to a transmitter circuit, or to bypass any capacitor in the transmitter circuit.

In addition to the three-electrode lamp, a multi-electrode lamp, a magnetron, or other may be used.

an electronic or ionic device that allows for a change in conductivity in some way.

The subject of the patent.

1. A device for controlling the frequency of a cathode generator, characterized by the cumulative use of one or several three-electrode cathode lamps Lr, shunting some apparent resistance, such as a capacitor or self-induction coil, in one of the circuits, for example, the generator grid and resonant circuit / or circuit II, in which the current becomes minimal at resonance, and which is electrically connected, on the one hand, to the generator, and on the other hand, to the grid of the lamp (or lamps Lr) via rectifier V, with the intention that By changing the transmitter frequency, the voltage on the grid of the lamp (or Lr lamps) specified by circuits / or II through a rectifier changed, and consequently the conductivity of the lamp (or Lr lamps) and the tuning of the generator circuits shunted by the lamp (or lamps Lr) changed, and the oscillator frequency returned to its original value.

2. The change of the device described in item 1, characterized by replacing the Lp three-electrode lamp, electron or ion discharge tube with any number of electrodes, and the device used to control the discharge in this tube is electrically connected.

. I.

...