TinyBeacon enables an easy setup of VHF and UHF beacons, through a simple and compact design, using a credit card-size PCB, at a low cost, and with easy installation close to the antenna. The PLL system is disciplined by GPS, allowing digital modes like WSPR and PI4, which require good clock stability and time synchronization. The system integrates a DC-DC regulator that accepts flexible power between 10 and 15 volts, with a common QRP output power of 5W. The reference design is provided for 50, 144, 220 and 432 MHz, but the circuit could be adapted to other bands.
