Current Amplifier (CB6136E)

This circuit was found in a British documentation from 1969. It can be implemented with modern transistors. The pass band is 6 MHz.

| Clique na imagem para ampliar |

Microwave Field Strength Meter (CB5187E)
The sensor diode used in this circuit is the common type of germanium. Experiments may be made...
Refrigerator Alar (CB1351E )
Placed inside the refrigerator, this circuit triggers an oscillator when the part is opened...
Simple Transistor Test (CB4326E)
This test consists of a simple Hartley oscillator using a transformer of the type found on older...