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
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
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
The output stage
rated for a
of 10 amperes.
These devices are
connected in a
ment, which boasts excellent current capability.
Elaborate Protection Features Assure Total
When a problem occurs during operation, the circuit
breaker integrated in
the power switch
off the power, to
protect the unit and
Assembly with protection
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