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  • 20 Watt Power Amplifier

    This IC chip was designed specifically for use in power boosting applications in automobiles. It is self protecting against short circuits and thermal problems. In the bridge configuration shown it will deliver 20 watts of power into a 2 ohm speaker operating at 14.4 volts. VN:F [1.6.9_936]please wait…Rating: 1.0/10 (1 vote cast)VN:F [1.6.9_936]Rating: 0 (from […]

  • The DPA 220 schematic

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  • Inside Story: Audison LR604XR amplifier

    Of the few car amplifiers I tested, gutted, decyphered and fixed, this one seems to be the best in design quality. Too many car amps (although solidly built) are apparently designed by computer class students – too many traces, too many vias, absolutely wrong component placement etc. VN:F [1.6.9_936]please wait…Rating: 0.0/10 (0 votes cast)VN:F [1.6.9_936]Rating: […]

  • Switch-mode Power Supply for a Tube Car Amplifier

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  • Large capacitor charge “controllers”

    One-farad capacitors require some care. It’s a common knowledge that they must be pre-charged with a current-limiting resistor before plugging in. It is less common knowledge that those fifty-dollar ‘smart cap controllers’ are in fact very simple devices, two dollars for parts and labor. VN:F [1.6.9_936]please wait…Rating: 10.0/10 (1 vote cast)VN:F [1.6.9_936]Rating: 0 (from 0 […]