Purchase instructions:

A. All kits in our store require buyers to DIY complete the soldering (pre soldered SMT components) and debugging themselves;

B. The installation of the kit carries risks. Buyers are advised to correctly evaluate their technical level and equipment to avoid unsuccessful kit installation and adjustment;

C. Kit manual (electronic version), if needed, can be obtained from the store owner after purchasing the kit;

D. The kit includes all circuit diagrams, but does not provide PCB design, microcontroller source code or firmware, etc;

E. The kit is shipped with scattered electronic components. The finished product pictures displayed in our store are for reference only when purchasing;

F. If there are missing parts in the kit, please do not panic. Contact our store and we will send a replacement after verification.


The DIY kit is designed for beginner shortwave enthusiasts and has the following features:

1. Using STC8H1K17 microcontroller as the main control, with built-in PLL local oscillator and built-in frequency indicator circuit (using seven segment LED digital tubes, display unit is 1KHz, photo has color difference, actual color is red), working frequency covers 28.400-29.300MHz, supports AM mode.

2. The reception adopts a frequency conversion circuit, with TA2003 performing reception mixing, intermediate amplifier, and AM detection. The output audio signal is adjusted by a digital potentiometer to adjust the sound size, and then sent to LM386 for amplification.

3. The transmission adopts Class E amplification with an average power of 5W.

4. Relay switching is used for transmitting and receiving, and the machine is equipped with a microphone.

5. Original code, onboard CNC volume potentiometer, supports automatic configuration saving, supports intermediate frequency calibration, and supports crystal oscillator frequency calibration.

6. Powered by 12V, with a PCB board size of 71 * 100mm, it can be easily placed in an aluminum chassis of 76 * 35 * 100mm for use.

7. This kit comes with a handheld microphone.


Main indicators
Power supply: 12V
Working current: receiving ≈ 130mA @ 12V; Emission ≈ 1300mA @ 12V
Frequency range: 28.400-29.300MHz, 10KHz/1KHz stepper
Working mode: AM transceiver

Attention: This product kit is a loose part and requires manual assembly