GAl
N
CONTROL:
CURRENT
LIMIT:
CLIPPING:
OUTPUT:
2.2. REAR PANEL
VOLTAGE
SELECTOR
POWER SOCKET:
A logarithmic potentiometer allowing
continuous attenuation
of
the signal
down
to
0 V. Gives 0 dB attenuation when
turned
fully
clockwise.
A
two
position switch
for
presetting
output
current lim
it
to
either
"5.0
A
RMS"
or
"1.8
A RMS". These
two
values
are
the current ratings
of
the 8 & K
Vibration
Exciter
Type
4809
and
Mini
Shaker
Type
4810 respectively.
An
amber warning lamp which indicates
that
output
current exceeds the
limit
set
by the
CURRENT
LIMIT
switch or
that
output
voltage exceeds 15 V RMS, and
that
output
signal
is
clipped. The amplifier
will
continue
to
operate. However,
input
level must
be
reduced
or
attenuated
to
resume operation
with
a good waveform.
Output
terminals
for
connection
to
the
load. The right-hand terminal
is
ground.
Output
impedance
is
less
than 0.04 n
between
10Hz
and
5kHz
and
less
than
0.08 n
from
5 kHz
to
20kHz.
For
selection
of
correct mains supply
voltage,
unscrew the central fuse, remove
the
black selector bush, insert the
pin
associated
to
the
window
on the bush in
the socket corresponding
to
the desired
mains
voltage and plug
it
fully
in. The
correct mains
voltage should now appear in
the
window.
The fuse
is
250
V, 1 A rated.
Socket
for
connection
of
AC
mains supply.
For
connections
see
Fig.2.3.
5
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