1-quadrant logarithmic converter (CB7333E)

This temperature compensated circuit was found in a Popular Electronics from the 90s. Integrated circuits and transistors are from that time.

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Additional Pull Pull (CB6119E)
This stage was found in a 1964 Electronic Design. The transistors are of the time and the shape of...
Successive Tone Decoder PLL (CB3958E)
This circuit with the known PLL 567 can be found in other versions in this section and in this...
Audio Monitor (CB421)
In this circuit, the LED Will blink in a presence of na áudio signal in the input. Gain is...