It is used in sports direction finding radio, traditionally called "Fox Hunting". The essence of sports direction finding consists in combining operational direction finding of radio transmitters installed at checkpoints, running and orienteering on various terrain, made in a sealed version, which is provided by rubber pads and caps in the case details and in the receiver’s controls.

Structurally, the receiver consists of a housing and an antenna system. The body of the receiver is made of aluminum alloy, closed with a lid, which is fastened with screws.

In the receiver housing, an external charging and power control jack is installed.

Antenna receiver system contains a loop and whip antenna. The loop antenna is made in the form of a ring of aluminum tube and is permanently fixed to the receiver body. Whip antenna is removable and is a pin made of profiled steel tape.

Contents of delivery

Altai-3.5 radio receiver (with frame and whip antenna).

Headphones TA-56M with ambushy headphones.

The main technical characteristics of the receiver "Altai-3.5".

Operating frequency range - 3.47 ... 3.68 MHz

Sensitivity with signal-to-noise ratio, no more than 1.2 µV.

Selectivity on the mirror channel, not worse - 40 dB.

Output power at Kg = 15%, no less than - 30 mW.

The maximum current consumption, no more - 20 mA.

The power source is a 9V type battery battery.

Overall dimensions of the receiver housing, LxWxH, mm: 255x55x35