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Superheterodyne portable radio for battery and AC
With gray plastic cabinet, white station scale with black lettering, blue pointer and the Braun logo in red. It has a brown leather carrying belt, wrapped around the cabinet. The two white thumb wheels on top are for volume and tone control; the blue knob on the right is used for tuning. It has the same colour as the pointer. Four push-buttons in the middle are used to switch the radio on and off and to change the wave lengths. Connections for an external antenna, mains and 6 volts car battery are situated in the right hand side. There is an internal connection for a gramophone player. The design is by Dieter Rams.
The radio is equipped with four battery valves in series, 3 transistors and a germanium diode. The LF stage has two OC72 transistors. The OC76 and the OA81 are used in the converter, that supplies 60 volts plate voltage, so a battery for plate voltage is not needed. The radio uses a 6 volt lantern battery with an average life span of 80 hours, but it can also be used on AC.
The radio receives medium wave, long wave, and short wave.
The original price was DM 215,-
Data Valves/transistors
Serial number: 207063
Made in: 1957
Production period: 1957-1959
Purchased in: 2012
Voltages: 110, 125, 150 and 220 Volt ~ 6 volt -
Dimensions (w×h×d): 29.5 × 20.5 × 9.5 cm
Weight: 3,5 kg
Circuits: 6 AM

Transistors/diode: OC72 (2x), OC76, OA81

Click on a valve for more information

Circuit

What was broadcast in 1957?

 

Listen to "The Banana Boat Song", sung by Freddy Quinn with Horst Wende and his Rhythm Boys, recorded in 1957

 

Inside

This page was last edited on 25.04.2019