18th October 1954

The Worlds First Transistor Radio.

Gray TR1 Radio
The Regency TR1- Four transistor radio.

It may surprise you to know that the worlds first transistor radio was not Japanese, it was designed and manufactured in the United States by I.D.E.A. in Indiana. The transistors chips had been invented just 7 years earlier in 1947 and was just perfect for small radio design. The Regency opened the doors for others to follow, which they did in vast numbers. The Regency TR1 was first launched in black, red, gray and ivory, with deluxe finishes added for the Christmas 1955 season, pearl white, lavender, pink, lime and meridian blue. The TR1 measured just 13x8x3 cm, in the US it sold for $49.95 and $54.95 for the deluxe finish.

Today the Regency TR1 is sought after by collectors with prices in the region of 300 for radios in good condition and much much more for the very rare deluxe finishes.  

Release date: Oct. 18, 1954
Weight: 12 ounces
Battery: Eveready 412 (22.5V) 
Transistors: 4off from (TI) Texas Instruments USA ( circuit 35k )

See a 1954  advertisement for the TR1 (image size 94K)