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Bomb Proof 150 Watt MOSFET Power Amplifier

2015-01-06 06:16  
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Bomb Proof 150 Watt MOSFET Power Amplifier
In my opinion that is the best buildable high power amplifier out there. Quality of sound is just remarkable. This is a real bomb proof amplifier like the best Valve amps. Power supply circuit is also shown. Now lets see why we are going to use MOSFETS. Thermally, the MOSFET has an advantage over the bi-polar transistor. As a bi-polar transistor heats up in use, the collector current increases due to the positive temperature coefficient of the device. If the temperature rise were allowed to continue then thermal runaway would ensue and the transistor could be destroyed. A MOSFET however exhibits a negative temperature coefficient. As the device heats up in use the Drain-Source current decreases (due to increasing internal resistance), the device temperature will also reduce in turn and the Drain-Source current will then rise again. Source: discovercircuits