Remodel the air band receiver kit with digital local VFOⅢ

Remodeled Chinese air band receiver kit with R909-VFO by nobcha©

2024.10.04

 Chinese air band receiver kit combined with the digital local oscillator

 This is the second example of the R909-VFO applications.

The major works to remodel are below:

1. To assemble the Chinese air band receiver kit and modify some.

1.1 To modify for outsourcing of the local oscillator. To pull out the AGC signal.

1.2 To set up the connection board with +5VAVR and si5351a module mount.

2. To assemble the R909-VFO

3. To install above in AL case with the front and back panel PCB.

Please refer the manual and also GITHUB in details.

The block diagram is below.

The necessary parts

BOM for R909-VFO

Remodeling the Chinese air band receiver kit as below.

Arduino sketch is here.

Enclosure

1. The receiver should be installed in the original aluminum case.

2. We shall buy the aluminum 88x38x70 case at EC store.

(For example; KX-JOJO electron store at AliEppress)

Connection circuit between the air band radio and Arduino controller.