A small, simple AM receiver project with only 3 transistors. This circuit can pick up medium wave stations in your area. It can use general purpose transistors, and in this example there are 3 BC109C ...

This low-cost AM transmitter is tunable from 10 to 15 MHz with the help of ½J gang condenser VC1, ... (transformer) = 15 turns primary, 3 turns secondary using an IFT core with tuning slug; L1 = 4 ...

Elektor published a matchbox radio project that pushed the limits of miniaturization. It was a compact, fully functional AM ...

A bump circuit with flexible tuning ability that uses 500 times less power and is smaller than previous circuits has been demonstrated by researchers at the University of Tennessee in the US.