Transistor Radios Around the World

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

1957 Zenith Royal 500, second version — 7ZT40 chassis series

Coat pocket radio, nylon cabinet
5 3/4 x 3 1/2 x 1 1/2 inches / 146 x 89 x 38 mm
Seven transistors (Zenith ovals, 2N15, 3x 2N35, 2N93, 2N194, 2N216)
Superheterodyne circuit, vernier tuning
Four 1.5-volt AA cells
Manufactured by Zenith Radio Corp.; Chicago, Illinois

The second version of the Zenith Royal 500 — 7ZT40 chassis series: vernier tuning and a printed circuit board were the big changes here.

1957 Zenith Royal 500, 7ZT40 chassis series

1957 Zenith Royal 500, 7ZT40 chassis series

chassis — click on the photo for a larger image

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