Transistor Radios Around the World

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1960/61 Eltra Koliber MOT-601

Coat pocket portable, thermoplastic cabinet
6 1/4 x 3 1/2 x 1 9/16 inches / 159 x 89 x 40 mm
2-band LW/MW, six transistors (Philips?, OC44, 2x OC45, OC71, 2x OC72, + TEWA DOG56 diode)
Superheterodyne circuit
Four 1.5-volt cells
Manufactured by Eltra / Zaklady Radiowe; Bydgoszcz, Poland

The next model after the Eltra MOT-59, the Koliber MOT-601 was manufactured in 1960 and 1961 — like the Eltra's logo, the black "Koliber" logo is raised-lettering plastic separate from the cabinet body itself. Stamped on the lower left corner of the cabinet's back face are the English-language words, "MADE IN POLAND", indicating that this radio was made for export.

Looking at this chassis, it's difficult to identify most of the transistors here — very likely all were made by a western European manufacturer, probably Philips, although some MOT-601 units are said to have incorporated several TEWA transistors (TG5 and TG50). Poland's own TEWA manufacturing plant didn't begin producing transistors until 1960, and then only AF transistors for the first year or two — it's likely that the 1963 Koliber 2 was the first Polish transistor radio to routinely employ Polish-made transistors.

1961 Eltra Koliber MOT-601


chassis — click on the photo for a larger view


schematic — click on the image for a larger view

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