CMOS Mixer (CB9033E)

This touch-controlled circuit was found in English documentation from the 1970s. The components used are common today.

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40W Transistorized Amplifier (CB11574E)
This circuit consists of a traditional amplifier version with complementary output using BD series...
Simple continuity test (CB8637E)
This continuity test was found in a 90s Electronic Engineering. Transistors are types of general...
Band rejector active filter (CB7405E)
This filter was found in Texas Instruments documentation from the 1980s. The circuit uses a common...