Transmitter

The Transmitter category focuses on RF circuits that actually put a signal on the air: from simple QRP rigs and short‑range AM broadcasters to more advanced HF drivers and linear stages. You’ll find classic experiments like the Ten Minute QRP transmitter and Mighty Mite, educational HF and short‑wave transmitters, as well as modern solid‑state designs such as Class‑C AM transmitters and IRF510 push‑pull power amplifiers.

Each article explains the full RF chain in practical language—oscillator, buffer, driver, PA, filtering, and modulation—so you see how the blocks fit together instead of just copying a schematic. Wherever possible, circuits are crystal‑controlled or otherwise stabilised, with notes on heatsinking, harmonic suppression, legal use, and how far you can realistically expect to be heard. Whether you want to understand the theory behind AM and CW transmitters, build a low‑power beacon, or develop the RF stages that will later become a full transceiver, this section gives you proven starting points and measured results to guide your experiments.