Uninterrupted power supply of the transceiver. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Uninterrupted power supply of the transceiver. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Civil radio communications

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Basic transceivers, as well as car radio amateurs for stationary use, as a rule, are powered from mains sources. In rural areas, in the country, problems may arise due to the low reliability of local power networks. Sometimes this leads to a long blackout of energy consumers and loss of radio communication.

The logical way out of this situation is to use the battery as a backup power source. You can connect it as shown in the figure. When the mains voltage fails, the transceiver automatically switches to emergency power without interrupting the communication session.

Uninterrupted power supply of the transceiver

Diode VD1 prevents the battery from discharging through the output circuits of the power supply in the off state. The voltage drop across the diode (0,7 ... 0,9 V) reduces the transmitter power, but this has little effect on the communication range.

In the presence of mains voltage, the transceiver, as you know, operates from the power supply, and the battery is recharged. In the event of a power outage, the transceiver switches to emergency power from the battery. When the power supply is restored, the transceiver will again operate from the power supply.

Rechargeable battery - motorcycle type 6ST9. Diode VD1 - any with direct current up to 10 A (D214, D215, D232A, D242). The elements are connected by a wire with a cross section of 0,75...1,5 mm2. The diode can be placed in the power supply case. The power supply must be stabilized and maintain the voltage indicated on the diagram.

Author: B.Tatarko

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