Found in a 90s English documentation, this circuit consists of an RF detector for testing in RF stages. The diode can any germanium type.
The project is from a 1992 publication, but totally current by the components it uses. The LEDs...
This circuit was found in Radio Electronics from the 90s. The transistor is for general use. The...
This circuit is suitable for testing motor starting capacitors. Capacitors from 2 to 8 uF are...