The heat sinks assure that under normal operation the transistors will operate at a low temperature. The power transistors are mounted on oversized anodized heat sinks. This additional testing makes sure your MC 250 will deliver its rated power from 20 Hz to 20,000 Hz with low distortion and complete reliability. The power transistors used in the output section of your MC 250 are selected for their high power dissipation capability, wide frequency response, and large "safe operating area." In addition, each power transistor is given four separate tests before it is put in your MC 250. The output section is arranged as a series pushpull amplifier. The voltage amplifier is followed by two driver transistors. The signal is then fed to a voltage amplifier. This large quantity of feedback is used to reduce noise and distortion. Both AC and DC negative feedback are applied to the other input. The signal from the preamplifier section connects to one of these inputs. The two stage preamplifier is fed to a pair of matched transistors arranged as an emitter coupled amplifier with two inputs and one output. There are 13 transistors in each power amplifier section. Technical Description A two stage preamplifier with three transistors in each channel increases the input voltage 16 dB.
0 kommentar(er)
