This circuit was found in a 1964 Electronic Design. The transistors are of the time, but can be employed as modern equivalents. The system is for car with contact breaker.
This simple MW radio was found in a 1975 publication, but it can be mounted with BC548...
This circuit is basically the same as the previous configuration (CB15616E) with a power stage with...
This experimental receiver works with alternative sources of energy or a single cell of any type....