100V Negative power supply (CB21182E)

This negative voltage source was found in a Popular Electronics from the 90's. The transformer has 120V secondary and 4-12V primary.

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Q Variator (CB7369E)
With this circuit found in an American documentation from 1969 it is possible to vary the...
Digital Voltage Reference (CB24682E)
The reference voltage for this circuit can be selected digitally. The circuit is from Radio...
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This circuit was found in an old factory documentation. The circuit uses single-junction...