This commercial receiver from the year 1958 uses two AA cells as Power supply. The circuit is intend to receive MW station and the transistors are germanium types not easy to find today.
This circuit converts the voltage from small fixed sources of 6 V or 12 V into 3 V for powering...
This stage was used in old audio ampliiers and radios from the 1950s and 1960s. It uses one of the...
This useful benchtop power supply uses a single LM350 integrated circuit as a regulator. The...