Enter an old Radio Shack P-Box stereo amplifier kit. After a few modernizations and tweaks, the result is an 8-transistor stereo amplifier that’s aesthetically pleasing, sounds great ...

The humble transistor radio is one ... It’s an extremely conventional design of the era, with a self-oscillating mixer, 455 kHz IF amplifier, and class AB audio amplifier. The devices are ...

The power amplifiers work with dual-cell batteries, supporting two-way radios and wireless devices with broad frequency ...

In order to develop the necessary technology, the project Magellan—High Efficiency mm-Wave GaN Transistor High Power Amplifier for GEO and LEO Active Antenna Application—was launched in 2024.