About: Twenty-something german engineer. Software development from large scale cloud computing to iot. Hardware development from breadboard to mass production.

This project started about a year ago when I came across an old superhet valve radio on ebay. I didn´t had any useful application in mind when I bought it but as it was really cheap an in good condition I didn´t wasted that much thougths about it.

After some research and a few screws removed I collected some background information on the device I just bought:

Manufacturer: Blaupunkt

Model Name: Roma

Manufacturing Date: Between 1958 and 1959

Technology: Superhet vacuum tube radio

Luckily there was a sheet with the circuit diagram hidden inside the radio.

Before we continue, let´s have some words about safety. Devices like this and in general devices that are plugged into a wall socket, contain high voltages which can easily kill you. These voltages can still be present hours after unplugging it. So please, when working on such devices, make sure to not touch any metal parts and if you do, double check weather it is still energized. Stay safe!