This LM380-based circuit was found in documentation from the 1980s. The components are current, and the transistor may be a general-purpose equivalent. Note the use of a medium impedance speaker.
This circuit was obtained in a 90s 73 magazine for radio amateurs. The power transistor must have...
The circuit shown is an AM radio for the Japanese mid-wave range of the 1960s. The circuit has a...
This circuit brings together the drawing of the sports lottery, lotto and sena in a single digital...