Transistor Radios Around the World

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Before '54 --- North America --- Western Europe --- Japan and Pacific --- East Bloc and USSR

1958 Sony TFM-151

Portable radio, thermoplastic cabinet
9 5/16 x 7 5/16 x 3 1/16 inches / 237 x 186 x 78 mm
Fifteen transistors (Sony, 3x 2T65, 2x 2T76, 2x 2T85, 5x 2T201, 3x 2T203), + four Sony 1T23 diodes and one Sony 1T51 varistor)
AM superheterodyne circuit / FM circuit
Four 1.5-volt "D" cells
Manufactured by Sony Corp., Japan

The world's first AM/FM transistor radio. Fifteen transistors! And of course none of them were "dummy" transistors — all were fully employed, eight of them in the FM circuit alone. An extremely expensive radio at the time, and very few units appear to have been produced before production was halted — as Alan Kastner has suggested, perhaps not many more than 1000 units in total were produced.

1958 Sony TFM-151

1958 Sony TFM-151
note the two cracks in the handle, common to almost all TFM-151 examples
(see the note at the bottom of Alan Kastner's second page on the TFM-151)

inside back cover

in leather case

chassis (click on photo for a larger image)

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