Device for automatic rotation of the antenna. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Antennas. Technology
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An important condition that determines the "range" of the radio station is the presence of a highly directional rotating antenna. The proposed scheme of the automatic antenna rotation device (see figure) allows the operator to work without being distracted by the "Right-Stop-Left" switch, which significantly increases the efficiency of work.
The supply voltage through the normally closed contacts 2-3 and 5-6 of relay P1 is supplied to the EM electric motor, which rotates the antenna mast through the gearbox. There is a protrusion on the mast, which, when the antenna is rotated 350-360 °, presses the Kn2 button. The latter includes the power supply circuit of relay P1, which closes contacts 1-2 and 4-5. There is a change in the polarity of the power supply of the electric motor, and it rotates in the opposite direction. The rotation continues until the protrusion presses the Kn1g button, which breaks the power supply circuit of the relay P1. The relay contact group P1 returns to its original state and the whole process is repeated.
The indication system consists of a voltmeter, a limiting resistor R1 and a rotation sensor - a resistor R2. Resistor R2 is mechanically connected to the mast. Its type is PPZ-12 (or any wire resistor). Relay P1 - any suitable contact group.
Author: T. Oputin, Perm; Publication: N. Bolshakov, rf.atnn.ru
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