With its "genuine superheterodyne circuit ... The Regency was the first transistor product for the mainstream. A relatively simple 12-ounce AM radio, it marked the turning point from analog ...

One of the first electronic projects I worked on was just such a circuit ... Transistor Radio. This book built the reader up through a series of steps to a fully-functional 3-transistor Medium ...

Measuring 5×3×1.25 inches and weighing 12.5 ounces, the Regency TR-1 was designed to receive AM ... in a superheterodyne design. Each transistor cost approximately $2.50, about $20 in today's ...

that work well for radio reception. The 120k resistor is for regenerative feedback between the Q2 NPN transistor and the input to the tank circuit. The value of this resistor is important to the ...

Scratch-building hams usually start by making their own antennas, but eventually, the itch to build one’s own radio must be scratched. And building this one-transistor ... (AM) voice work. The ...