Embedded Lab

The aeronautical VHF band ranging from 118 to 137 MHz is the primary band used for aviation related communications. Dilshan R Jayakody’s new project is a simple radio receiver which is capable to receive audio communication between pilot and air traffic controller in the VHF aviation band. The receiver is based on Samsung’s KA22429 IC, which is a complete device for making a portable FM radio receiver.

Dilshan writes,

The dimension of PCB of this receiver is 70mm × 45mm and all the components except KA22429 are standard through-hole type. For the optimal results we recommended to use high gain audio power amplifier and good external antenna with this receiver. During prototyping / testing, we drive this system with 5V DC power supplyand also connect this receiver to TDA2050 AF power amplifier. At our testing we got very successful results on 124.900MHz (Colombo Airways Center), 119.100MHz (Colombo/ Ratmalana Approach) and 118.100MHz (Colombo/ Ratmalana Tower). The recorded sample on 124.900MHz using this receiver is available in here.

VHF receiver