The R-861M1 emergency short-wave radio set

The R-861M1 emergency short-wave radio set is designed to offer simplex communication between the crew of an aircraft or helicopter in distress and the land bases and search and rescue aircraft (hel¬icopters) in telephone and telegraph modes. In addition, the radio unit can be utilized to automatically transmit distress signals.

TYPES OF OPERATION:
• Amplitude shift keying without a modulating signal, key operated;
• Amplitude shift key with a carrier signal modulated by the automatic distress signal sensor;
• Double sideband telephony with amplitude modulation;
• Automatic transmission of distress signals.

Key Parameters

Operating frequencies, kHz

2182

4182

8364

12546

Transmitter power, W, at least

4

Receiver sensitivity, uV, no worse than

3

Continuous operation in transmission mode: reception ratio of 1:6, at least, hours

48

Communication range, km

7…10

Operating temperature range, °С

-50…+50

Dimensions of the receiver-transmitter in a case, mm

510х310х220

Weight of the complete radio kit, kg

14