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"Pixie 2" QSK mini transceiver |
| Introduction
The crystal oscillator is a simple parallel-mode Colpitts type, designed for 3.5 MHz. The frequency depends on the used crystal, the preferred value is of course 3.56 MHz, the worldwide QRP-frequency! The "PA" is made with a 2N2219, delivering max. 400 mW to the antenna. But, this transistor is also a mixer for receiving signals. The LM386 is a populair AF amplifier, and gives enough gain to hear the stronger stations. | Warning! You must have a HF amateur radio licence to build and use this transceiver! Some hints You may add a series variable capacitor to the crystal which enables you to tune a little bit in frequency. Of course, you can add more components to improve e.g. receiving quality, but that's not the fun of this transceiver! Just keep it simple... Build the transceiver on a piece of PCB, using the "high-wire" method. All components which are connected to ground are soldered at the PCB, other nodes are floating. |
The smallest QRP transceiver for 80 meters, called "Pixie 2", is a very nice TRX to start building your own equipment. Minimum components, maximum fun. The spec's are poor, but what can you expect for 5 dollars?| Circuit
Component list
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