This circuit was found in an American documentation from 1969. Indications of the used transistors are not given, but general-purpose types can be tested.
Found in National Semiconductor publication from the 1980s. This gain-100 circuit can be...
We found this configuration in a 1975 publication. It can be implemented easily, as it uses only...
The high number of transistors on this radio for the medium wave range is an indication of its...