SU24467A1 - Device for wireless telegraph manipulation - Google Patents

Description

One of the important tasks in designing a wireless telegraph transmitter is the issue of load balancing, that is, maintaining the load constant of the anode power source of a powerful transmitter cascade. When the key is pressed, the constant component of the anode current of the powerful cascade drops sharply, which causes, if special measures are not taken, fluctuations in the mode of the power source. To maintain a constant power supply mode during manipulation, various methods have so far been proposed, with the disadvantage that they complicate the transmitter circuitry and the need for different types of auxiliary devices (for example, additional lamps).

The object of the present invention is a device for wireless telegraph manipulation while simultaneously balancing the load of the anode power source, in which load balancing of the anode power source, in which load balancing of the anode power source is achieved by applying a common grid displacement potentiometer of powerful and manipulated cascades to which the telegraph is connected key

so that when the key is pressed, the potentiometer is short-circuited or through some resistance in order to increase the magnitude of the negative displacement on the grid of the cascade being manipulated, and decrease on the grid of the powerful cascade.

In FIG. 1 depicts the scheme of the proposed device; FIG. 2-modified form of its implementation.

A potentiometer r is connected to battery B, part of which can be short-circuited or resisted by means of key A. From the potentiometer at the point a diversion is made, which is connected to the grid of the cathode lamp of a powerful cascade. From the point b of the potentiometer, a tap was made connected to the grid of the lamp of the previous stage of the transmitter. When the key is pressed, the grid displacements of the powerful and previous cascades are such that in these cascades there are electrical oscillations corresponding to the normal mode of the transmitter. When the key is pressed, the current in the potentiometer increases due to a decrease in its resistance. The voltage between the points and and from the potentiometer also increases. The negative bias becomes such that the oscillations in the manipulated cascade are suppressed. At the same time, the voltage between the points a and i, and hence the negative displacement on the grid of the high-power stage, decreases. The magnitude of the closing resistance is chosen such that when the key is pressed in the manipulated cascade, the oscillations stop, and the anode current of the powerful cascade does not change, and the load of the anode power supply during the manipulation remains constant. The same principle of manipulation can be applied in the form of the embodiment of FIG. 2. With the help of the key a, which alternately switches the clamps b c c, between which a part of the battery B is turned on, the corresponding negative displacements on the grids of the cathode lamps can be obtained.

The subject of the patent.

A device for wireless telegraph manipulation while simultaneously balancing the load of the anodic source, characterized by the use of a common grid displacement potentiometer for powerful and manipulated cascades, to which a telegraph key is connected so that when the key is unlocked, part of the potentiometer is short-circuited or through some resistance so that the magnitude the displacement on the grid of the manipulated cascade increased, and on the grid of the powerful cascade-decreased.

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