15W Amplifier (CB6284E)

This circuit was suggested by Texas Instruments in a 1968 publication. The transistors are of the time, and modern equivalents can be used.

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Hearing Aid Amplifier (CB21549E)
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This sophisticated circuit of the coin-toss game was found in an American 1980s documentation. The circuit...
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This windshield wiper interval was found in an old documentation. The SCR can be the C106 and the...