Similar to other circuits found in this section, this circuit is from a 1996 Electronics World; FET is general-purpose and the output circuit must be resonant at 100 kHz.
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...