We found this circuit in the Linear Applications Hanbook of the National Semiconductor in 1994. The semiconductors used are not very common today.
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...