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A new multi-mode QRP radio beacon built around the Arduino. The beacon started with the usual lash-up on the bench, hooking the previously reported Wotduino and DDS Shield up to a driver and a transmitter module, as previously used for the Raspberry Pi beacon

This article describes a simple QRSS beacon exciter for the DX portion of the 2200m amateur band.

The weather station described here uses a TTGO v3 1.6.2 module and various sensors. It displays the data on an OLED screen and transmits them among a choice of protocols to the APRS, APRS-IS, Wunderground servers or via an MQTT broker. APRS data is transmitted on 433.775 MHz (can be changed) using the LoRa protocol. APRS beacons picked up by iGate gateways are then transmitted to APRS servers.

This project delves into the development of a compact WSPR beacon, building on earlier experiences with weak-signal modes. Inspired by QRP Labs kits and modified open source designs, it integrates a Si5351 frequency generator, GPS module, and class E PA for efficient operation. Extensive optimizations—addressing drift, heat management, and power stability culminated in a portable, serviceable device. The beacon offers insights into propagation while minimizing reliance on main station equipment. Lessons learned highlight the importance of careful component selection and iterative design improvements for robust amateur radio experimentation.

This page details the construction and operation of a 23cm (1296 MHz) beacon designed by W6PQL. The beacon utilizes a PIC microcontroller (16F628A) to generate CW and FSK keying for a crystal oscillator, followed by frequency multiplication and amplification. Key components include a 1296 MHz crystal oscillator, a series of frequency doublers and triplers, and a power amplifier stage using a Mitsubishi M57762 module, capable of producing 10 watts output. The design focuses on stability and reliability for continuous operation. The microcontroller code, written in assembly, is provided, allowing for customization of the beacon's callsign and message. The beacon is intended for amateur radio operators interested in microwave propagation studies and equipment testing on the 23cm band. Schematics, parts lists, and construction notes are included to guide builders through the project.