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This is a general purpose amplifier that has a wide variety of general uses like circuit testing, phone line tabbing .. etc.  The circuit design is so effective that I'm producing it by the hundreds for local technical schools.

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More by Nick_Zouein:Aux Input for BMW 325i Business CD Adaptable 12vDC/220vAC Pure Sinewave Inverter Transforming a 300W Sinewave DC/AC mini inverter to a 5000W monster 
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