Texas Instruments/DELCO automobile transistor radio, 1957. The invention of the transistor at Bell Labs in 1947 gave engineers a powerful new tool that they quickly adopted for new radio circuits. Portable radios based on vacuum tubes existed prior to the transistor but transistorized designs proved more durable and much more energy efficient. Transistor radios first went on sale in late 1954 and by the early 1960s many Americans owned one. Car radios also became more reliable as transistors were integrated into the design.
Almanac: The transistor radio - CBS News
Rock and Roll Helps Drive TR-1
TI announces 1st transistor radio, October 18, 1954 - EDN
ACDelco AGM Batteries in Batteries and Accessories
Fm Radio 1970s
TRANSISTOR MUSEUM HISTORIC GERMANIUM COMPUTER TRANSISTORS IBM
phscollectorcarworld: 2019
Wow, great for car dealer, radio Buff, techno aesthetic Collector. Shows no use. Video will open in a new window. Dial cord pulleys lubed. It has a
General Motors Wall TRANSISTOR CAR Radio Delco Model #PR200M AM/FM Promo WORKS!
1957 1958 1959 DELCO GM TROUBLE-SHOOTING TRANSISTOR AUTO RADIOS
Delco's All-Transistor Auto Radio, August 1957 Radio & TV News
Delco's All-Transistor Auto Radio, August 1957 Radio & TV News
Guest Post: “Tinkering with History”
Radios, Vintage Sound & Vision, Sound & Vision - PicClick UK
Just Some Radios
File:Vintage Radio Advertising - Delco Radio, Delco's All-Transistor