Edwin H. Armstrong invents tube-operated regenerative receiver

In 1914, Edwin H. Armstrong invented the tube-operated regenerative receiver, a groundbreaking advancement in radio technology. This receiver utilized a triode vacuum tube to amplify signals, significantly improving sensitivity and selectivity compared to earlier crystal detectors. By feeding a portion of the amplified signal back into the input circuit (regeneration), the regenerative receiver could achieve much higher gain, making weak signals audible and enhancing overall performance. Armstrong’s invention revolutionized radio communication, paving the way for more reliable and effective receivers. It played a crucial role in the development of both commercial and amateur radio, greatly expanding the capabilities and reach of radio operators.