Ultra high gain FET amplifier (CB9065E)

Found in American documentation this circuit has a typical gain of 500 times. Other transistors can be used.

Humidity Detector (CB17513E)
This circuit consists of a simplified Hartley oscillator that changes the frequency according to...
Lights On Reminder (CB12637E)
This circuit activates the horn if the door is opened with the headlights on. The circuit is for...
Product Detector (CB15943E)
This linear characteristic circuit is based on a junction field effect transistor. The FI and BFO...