wspr-beacon-1.0

WSPR-beacon 1.0

  

Device Information:

The device is based on the Atmega328 microcontroller. This version of the PCB uses a TCXO to eliminate the frequency drift issue of the SI5351 that occurs when using the crystal resonator built into the ready-made modules. Be careful when selecting a TCXO, as not all of them will work correctly with the current PCB version! The TCXO I used, which has been tested on the actual device, is specified in the BOM file.

During device testing, it was possible to achieve zero frequency drift at 28 MHz when decoding WSPR messages in the WSJT-X application.

To amplify the output signal, an amplifier using a BS170 field-effect transistor is used, which requires basic tuning (information on tuning the output amplifier can be found in the assembly guide).

Firmware Information:

Firmware uploading is done using the Arduino IDE. Before using the device, it is necessary to calibrate the operating frequency for the current TCXO and SI5351 pair. The firmware preparation guide can be found in the corresponding instructions.

During device operation, you can log current actions using the "Tools" -> "Serial Monitor" in the Arduino IDE.