CZK - MKR-03 (návěstní radiový maják)

Signalling radio beacon MKR – 03.

Equipment of MKR – 03 is a VHF marker working at the frequency of 75 MHZ according to ANNEX 10.
It is designed to be placed on the habitat of the NDB and L (formerly "dálná" and "bližná"). It can be also used for marking points in the terrain within the line of navigation or to indicate the area of performance of flight tasks.

The device consists of two equivalent parts consisting of the transmitter, modulator and power inverter, performing the desired activity, i.e., the broadcast modulated branding positioning signals.
The common parts are the circuits of the monitoring of the transmitted signal, the circuits of measurement and control of the operating state and the circuits of the regulator ensuring the switch on the backup transmitter upon the occurrence of a fault.

The design is the equipment of MKR – 03 is designed as a modular system of functional units placed in the ground with the structural frame that carries the network resource,coaxial antenna relay, power outlet, power switch and power switch of the backup power source / equipment NAVYRA are located along with the fuses on the block with the Main switch and the contactor / connector N for the connection of the monitoring antennas and connectors for connection of a remote control.
On the front panel devices are distributed control and signaling elements, selector switch measurements and the panel meter.

Tactical parameters MKR – 03.

* Power supply :
- the main AC 230 V ±10 %,50 Hz
- backup DC 36 V ±10 %, (AKU 3x 12V/150Ah)
* Input power: AC 200 mA ; DC 1,2 a

* Transmitter output power of 0.5 – 3 W
* Frequency Of 75 MHz Of 0.005 %
* The modulating frequency, the adjustable line coupling:
- "NDB": 400 HZ ± 2.5 %
- "L" : 1300 HZ ± 2.5 %
(internal)3000 HZ ± 2.5 %

* The identification marks of the adjustable line coupling:
- "NDB": 2x comma / s
- "L" : 2x dot – comma / s
(internal):6 dot / s

* Transmit antenna type YAGI
(Monitoring anténka placed under a high speed. antenna - rod)


Source and photo: colonel.Ing. To.Kadlec.