That happened with the hand-held radio. The first transistor radio was a joint project between the Regency Division of Industrial Development Engineering Associates and Texas Instruments.

Consider the Regency TR-1, the first transistor radio from TI and IDEA. In late 1954, the four-transistor device went on sale for $49.95. That doesn’t sound like much until you realize that in ...

The transistor radio was one of the first consumer devices that employed solid state materials. See solid state. The Regency TR-1 was the first solid state radio available to the consumer.

the Regency TR-1 was the first commercially available transistor radio. It proved that transistors could replace bulky vacuum tubes, paving the way for smaller, more energy-efficient devices like ...