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Telefunken Operette 7 radio

An old radio that sat in the cellar of my grandparents' home for many many years. It was built in Western Germany by Telefunken in the '50s, at a time when thermionic tubes were still commonplace. When I found it I thought I would have to repair it completely, using rare and expansive parts, but as it turned out, the radio worked perfectly as I turned it on.

Here are some pictures of the device, including its inner wirings.

Even the electric schematics were still present ! Here are the scans.

Schematic Schematic

Original schematics I found with the radio.