It’s a 40 meter (7 MHz) QRP or low power transceiver in which the transmitter is a simple crystal oscillator and the ... way switch to transfer the single transistor — a J310 FET — between ...

[Qrp-Gaijin] shows how to do it with a single transistor ... He found that his original oscillator was driving an overtone crystal at its fundamental frequency. The device worked, but only ...

This evolution to more advanced technologies and internet-of-things (IoT) connected devices has seen increasing demand for ...