A low-cost QRP power amplifier design covering 1–30 MHz and delivering about 1 watt of output is presented. Built on stripboard using cheap, readily available transistors with no heatsinking required, it uses a Class C topology for efficiency. Because Class C is non-linear, it produces harmonics and requires a low-pass filter before use; it is suitable only for CW (Morse code) transmission. The project demonstrates that amateur radio construction remains accessible without significant expense.

2m read timeFrom hackaday.com
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