This circuit is indicated for supplying the CB17495E transmitter. The BD135 must have a small heat radiator and the zener may eventually have a higher voltage.
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...