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AV 3886 |
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This is a homemade power amplifier built around National's power chip LM3886. It has six channels,
each with a maximum output power of 50 W into 8
ohms. Here is the data sheet for LM3886 in PDF-format (852 kB) |
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The LM3886TF are mounted three on each side panel... |
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...and the few components needed are mounted the old fashioned way. The component values are from the data sheet. |
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All interconnections made, time for final assembly. The power supply consists of a transformer with 2x28 Volts AC output, a bridge rectifier and two electrolytic capacitors of 10 000 uF/63 V each. This will give a supply voltage of +40 V and -40 V. |
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And this is the final result. |
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The switches at left are for input selection and muting. The LEDs indicates +40V and -40V and to the right are the mains fuse and the power switch. |
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The 7-pin DIN-connector is the input from the preamplifier and the three 3,5 mm jacks are for a digital 5.1 decoder. |
| And HERE are the test data | |
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