Adjustable Noise Clipper (CB21106E)

The purpose of this circuit is to limit the noise of an audio signal. Diodes are made of germanium. The circuit is from an old American manual.

| Clique na imagem para ampliar |

Photo controlled triac (CB8312E)
This circuit was found in an Electronics World of 1968. It can be applied to any modern triac and...
Listening Monitor and 27 MHz Field Meter (CB19602E)
This circuit is from a documentation from the 70s. The transistors are types of germanium of the...
Audio Preamplifier (CB6479E)
Obtained from a 1996 documentation, this circuit uses common components and has a voltage gain of 200...