This simple source uses two 2N3055 transistors that must be equipped with good heat sinks. The source has no protection, only an input fuse. The diodes are for 5 A x 50 V or more.
To use the instrument for AC measurement, the tips are A and B. For CC use tips A or B for...
The interesting circuit shown in the figure, can have its gain digitally controlled and present two...
This simple MW radio was found in a 1975 publication, but it can be mounted with BC548...