Negative Ion Generator (CB25366E)

We found this voltage multiplier circuit in a Radio Electronics magazine from December 1991. The high voltage transformer is an adapted flyback

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High Impedance Instrumentation Amplifier (CB15879E)
The circuit in the figure is based on two integrated LM108 and its gain is basically determined by the...
High sensitivity photo Darlington (CB8259E)
Found in a 1968 Ferranti documentation, this circuit can be implemented with modern equivalent...
Car Amplifier (CB24019E)
This amplifier stage was equipped with a Motorola radio from the 70s. The transistors were from...