Accuphase PS 500 V Brochure

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Accuphase PS 500 V Brochure

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Superior Waveform Compensating Power When the input voltage is 110 V (220 V), the voltage at the secondar y side of the transformer will also be 110 V (220 V). To bring this to 120 V (230 V), 10 volts must be added, as shown in Figure 3 (a). Conversely, if the input is 130 V (240 V), 10 volts must be subtracted to yield 120 V (230 V), as shown in Figure 3 (b). In actual operation, the peak value of 10 V, namely 14.1 V is added or subtracted. Comparing a precise sine wave synchronized to the input frequency with the output voltage yields a compensation waveform which is imposed on the output voltage. Consequently, for an input voltage range of 108-132 V AC (200-253 V AC) and a constant load of 510 W, the output voltage is kept constant at 120 V ±2% (230 V ±2%), with a maximum distor tion ratio of 0.3%. These values demonstrate the outstanding waveform compensation ability of the PS-500V. Note: The above explanation is for the 120 V AC version of the PS-500V. Figures in brackets refer to the 230 V AC version. Highly Effective Interference Rejection The input side of the PS-500V is equipped with a line filter forremoving any high-frequency noise components present in the power line, such as generated by digital equipment. The primary and secondary windings of the power transformer are kept totally separate, and the fully shielded design shuts out any externally induced noise. Since the PS-500V uses the AC feedback principle, output impedance is extremely low. This prevents any possibility of mutual interference between components connected to the outputs of the PS-500V. Built-in Meter Allows Monitoring of Output Power, Input/Output Voltage, Input/Output Distortion. Overload Is Indicated by Flashing Meter Illumination. The meter of the PS-500V lets the user see at a glance how much power (VA) the connected equipment is consuming at any given time. This is especially helpful for components such as integrated amplifiers or power amplifiers whose power consumption differs considerably depending on the volume setting and actual music signal. The maximum output power rating of the unit is 510 VA. When this is exceeded, the meter illumination flashes as a warning indication. Excellent Current Capability The power amplifier which performs waveform compensation is configured as a pure complementary symmetrical circuit using current feedback forunsurpassed operation stability. The output stage uses transistors rated for a maximum current of 10 amperes. These devices are connected in a 10-parallel complementary push-pull arrange- ment, which boasts excellent current capability. Elaborate Protection Features Assure Total Operation Safety When a problem occurs during operation, the circuit breaker integrated in the power switch immediately shuts off the power, to protect the unit and any connected components. Assembly with protection circuitry Assembly with output stage with 10- parallel push-pull multi-emitter devices mounted to large heat sink, waveform compensation amplifier for addition/ subtraction, comparator for reference waveform and output waveform, deviation detector, etc. Assembly with input voltage/ distortion monitoring circuitry