4 W Amplifier (CB6281E)

This circuit is from a 1968 Motorola power circuit manual. The circuit uses transistors of the time. The passing band is 45 Hz to 100 kHz.

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4046 Alarm Clock (CB25768E)
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This circuit already explored in several diagrams in this section was found in a 90’s Popular...
CMOS Logic Probe (CB12014E)
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