Download  Print this page

General - HP Barney Oliver Manual

Hide thumbs

Advertisement

The Barney Oliver Audio Amplifier
A.

GENERAL

The
Oliver
quality all solid state audio amplifier designed for
two
channel stereo
in
and in small to medium sized
auditoriums. It is intended for use with full fre­
quency range 8 to 16 ohm
with signal
sources
AM and FM tunners) that are themselves
flat enough to
addition to the power
phono
designed to operate from any
of several
phono cartridges. These pre-
the necessary equalization for
characteristic. Additional
boards, install and wire printed
Hum
and
distortion
result of
attention to
routing
on
hum is well below thermal noise (which itself has
been minimized by
The output
of the amplifiers are operated
class-B to reduce standby power drain and are
biased and
degenerated to reduce crossover
A
distortion.
amount of overall
from over
low frequencies to over
audio range further reduces any
monic and inter-modulation distortion. Since the
E
Amplifier
is
a
in the
sound
(phonograph
pickups,
little or no
the unit includes
are
inaudible.
and to lead
circuit
the residual
input
100
dB
gain at de and
50
dB at the
ION I
E C
CRI
TION
are direct coupled, overload
no long time constant
high
simply clipped and the original waveform resumes
at
its
proper value immediately afterward. Be-
cause of the
only a fraction of a dB below actual overload
typically show a total distortion over
and
the fundamental.
In
amplifiers, and active filters in the
control board, enable the low-end response to be
maintained down to
rapidly below the audible range. This prevents the
and
their linear excursions by low frequency
transients
records or breath blasts into
end response is reduced at 18 dB per octave above
20
kc
another pair of active filters to protect
the amplifiers
of, strong r-f signals.
The power
from accidental short-circuits at their out­
puts. Momentary shorts will have no
As
a
sustained shorts may blow one or more of the pro­
tective fuses. In addition, all power
are either current limited or fused so that shorts
from test
feed-
and decay of power
of function
of the
transients in the
har-
low voltage
turn-on transient from the prla-amIJlll:leI
the
amount of feedback,
networks in the fi-circuits of the
20
Hz and to fall off very
from
from such sources as
overload
or
are protected
will in
cause no
considerable effort was devoted to
transients. A balanced
minimizes the tum-on
A slow tum-on in the
further reduces the
are
75
dB below
and
being driven
The
and careful
1-1

Advertisement

Table of Contents
loading

  Related Manuals for HP Barney Oliver