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1923 Single Dial Radio

1923 Single Dial Radio 1923 Single Dial Radio

Description

In 1923, Magnavox invented the world’s first single-dial radio. The radio, TRF-5, is shown with the R3 speaker. The set used 2 RF and 2 Audio amplifier (type A) tubes, plus 1 detector tube (type D), A&B batteries and covered the AM broadcast band.