Bridge Amplifier (CB19804E)

We found this circuit in documentation from the 1980s. The component values are calculated using the formulas next to the diagram.

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Direct Coupling Hearing Aid Amplifier (CB14760E)
We found this circuit in the old Mullard transistor reference manual from 1960. The circuit is...
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This modulated siren was found in a 1984 documentation and consists of a variation of the previous...
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This circuit indicated for didactic applications in technical schools was found in a 1982...