In 1954, the first truly portable radio was the TR-1 because it was the first radio to use transistors. ... See transistor radio and iPod. Advertisement. THIS DEFINITION IS FOR PERSONAL USE ONLY.

Known as “The Astronaut” by Realistic, it is a four-band portable transistor radio listed as a Radio Shack model 12-1377 in one of their catalogs. My dad originally bought it new, ...