SU57544A1 - Device for simultaneous manipulation of two elements of a radio transmitter - Google Patents

Description

There are cases when it is necessary to simultaneously manipulate two (or more) elements of a radio transmitter, and the effect obtained in this case in each element must be reversed. For example, for radio beacons, it is necessary that this simultaneous manipulation of two lamps working on one circuit in turn to allow such a situation that the effect on one of the lamps exactly fits into the internals of the second lamp. Such schemes are already known both in foreign and domestic practice, however, their natural disadvantages are mechanical inertia and the lack of complete identity of electromechanical relays. As a result, despite the fact that the voltage on the windings of the relay is applied simultaneously, their operation is unsatisfactory and a characteristic click can be observed on the telephone reception.

The present invention aims to eliminate these drawbacks and to implement a scheme that makes it possible to obtain inertial simultaneous manipulation of two elements (channels) of a radio transmitter. The manipulation is carried out by simultaneously applying to the chains of elements alternately different voltages at which radiation is emitted in one element (key pressed mode), and the other element is completely locked at this moment.

A single switch is enough to carry out this manipulation, and an electron tube can be used as a relay.

The operation of the device is based on the principle of allowing time constants to be reduced to a very small value (10).

In FIG. 1 depicts the scheme of the proposed device and FIG. 2 - scheme of its modification.

Two sources (7i and t /, direct current are connected to the resistances R, R and, respectively, R.,. The values of these resistances are chosen so that the voltage on the resistance R is offset when the key is pressed for the lamp L (lamp LI open), and the voltage across the resistance was equal to the bias voltage necessary to