35W Stereo Amplifier (CB25525E)

This circuit was found in a Radio Electronics magazine from November 1992. The components are from that time and the power supply must be dual.

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Differential instrumentation amplifier (CB9841E)
This instrumentation amplifier with differential inputs was found in documentation from the 90s....
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This circuit is from a Radio Electronics magazine from December 1958. The indicator instrument is analog...
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