Accuphase PS 500 Brochure

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Accuphase PS 500 Brochure

Extracted text from Accuphase PS 500 Brochure (Ocr-read)


Page 3

the input frequency With the output voltage, a com-
pensation waveform is created which is then imposed
on the output voltage. Consequently. for an input volt—
age range of 108-132V/200-253V AC and a constant
load of 500 W, the output voltage is kept constant at
120V/230V ( i 2%), with a maximum distortion ratio
of 0.3%. These values demonstrate the outstand-
ing waveform compensation ability of the F‘s-500.

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Fig 3 Waveform Shaping Principle of PS-500

Excellent Current Capability

The power amplifier which performs waveform com-
pensation is configured as a pure complementary
symmetrical circuit using current feedback for unsur-
passed operation stability. The output stage uses tran-
sistors rated for a maximum current of 10 amperes.
These devtces are connected in a ill-parallel comples
mentary push-pull arrangement which boasts a rated
output current oi4.2A/2.2A and an instantaneous peak
current rating of GOA/30A. This kind of current cape»
bility is an order of magnitude better than that of con-
ventional power supplies.

Highly Effective interference Rejection

The input side of
the PS—500 also
contains a line filr
ter for removing
highsfrequehcy
noise components
t h at m a y b e
present in the
power line. The pri-
mary and second-
ary windings of the
power transformer
are kept totally
separate, and the
fully shielded de
sign shuts out any
externally induced
noise.

Since the PS-SOO
uses the AC feed-
back principle.
output imped-

ini rreqwnsy spectrum of Pssm umput (photo c)

Fig. 4 Power Supply Frequency Spectrum

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Assembly with vinveioim ccmpensaliun :tm
'ADV for a nlsuhlrnctmm output stage with 10-53.
nllel pusinpuii m mittor devices mounted In llrgc hunt
sink. cumpnralnr luv retort-rice wavstorm and output waveform.
deviation noiuioi. etc.

ance is extremely low. This prevents any possibility
of mutual interference between components con-
nected to the outputs of the PS—SOO.

Figure 4 shows the frequency spectrum of the power
supply line and the PSVSOO output, It clearly demon—
strates that unwanted high—frequency components
Within the audible range are effectively suppressed
by the F’s-500.

Built-in Meter Allows Monitoring of Output Power,
Input/Output Voltage, Input/Output Distortion
The meter of the F’s-500 lets the user see at a glance
how much power the connected equipment is con~
suming at any given time. This is especially helpful for
components such .

as integrated ampl

liers or power ampl

fiers whose power

consumption differs

considerably de-

pending on the vol-

ume setting and . . .
_ Assembly with input voltage/dismrhon
actual music signal. monitoring nircuilfy