Melody Generator (CB25350E)

Based on an LS3404 this circuit was found in the July 1990 issue of Radio Electronics magazine.

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Universal Preamplifier (CB23615E)
This circuit was found in Radio Electronics magazine from October 1964. The circuit uses two...
High impedance buffer (CB9557E)
This circuit was obtained in a 90’s American documentation. The FET can be replaced by a modern...
10 W amplifier (CB9905E)
To a 16-0hm load, this amplifier provides a power of 10 W. We found this circuit in a Motorola...