NAD 7125 Owners manual
NAD
1. Antenna
2. Phono
3. Phono Ground
4. Aux
5.
Term
inals
In
put
Input
Tape
Rec/Play (Not in U.K. model)
6. Speakers
Speaker Impedance
7.
AC
B.
AC
9.
Power Cord
Convenience Outlet
2
3
4
5 6
1
7
9 8
1. Power 9.
2. Phones
3. Bass
4.
Treble
5. Balance
6.
Volume 14. Tuning Display
7. Loudness Compensation 15.
8.
Bass Equalization 16. Power Indicator
Tape
10
11
12. Up/Down Tuning
13. Memory Enter/Mono
Monitor
. Input Selector (Aux, Phono,
. Tuning Pre-sels
FM
Stereo Beacon
AM, FM
)
16
15 14
2
3 4 5
6
789
10
11
12
13
2
REAR PANEL CONNECTIONS
1.
ANTENNA
with four antenna terminals; each is a threaded metal shaft
with a plastic thumbscrew and a toothed washer which
will
make
U-shaped metal spade
wires.
some other type of connector, cut it off and strip off enough
insulation to expose approximately 1 cm
wire
unscrew the appropriate thumbscrew, place the spade lug
or bare wire under the toothed washer, and turn the thumbscrew clockwise until it is tight. The toothed washer will grip
the
electrically and mechanically.
for
built-in
simple wire up to one meter (three feet) in length will provide
ample signal strength, and such a single-wire antenna
included with the receiver. Connect one end of the wire
AM terminal. The remainder
to hang down behind the receiver
horizontally along the rear of a
(A
wire should be stretched out along the
shelving and tacked in place
with the orientation
pOSition that provides the best reception
listen to most often.
reception
improve reception
outdoor antenna to the AM terminal. As its name implies, a
"long-wire" antenna is a simple, straight wire whose leng
may
meters) , mounted parallel
secure contact either with bare wire or with the
If you are using an antenna whose lead-in wires have
on
each
lug
or
wire, making a connection that is secure both
Some form of external antenna will
AM.
satisfactory
AM
metal shelf
The
short-wire antenna usually will provide satisfactory
of
be anything from a few feet up
convenient.
antenna will be improved by connecting a second wire
from the Ground (G) terminal to a true earth-ground, i.e.,
a copper-plated rod driven several feet into the earth .
A substitute electrical ground
a cold-water pipe, a steam radiator, or the third hole
of a modern electrical
FM.
Some
to the receiver for effective reception of stereo FM
casts. A ribbon-wire "folded dipole" antenna is supplied with
the receiver to
ribbon·wire antenna you will note that it is in the form
The
"T."
horizontally and tacked in
cabinet,
to
to the
you
need for reception
efficient at rejecting "multi path" and other forms of FM
interference, and it cannot easily be rotated to optimize its
pickup pattern for best reception
directions. Therefore,
antenna.
cost, are as follows:
auxiliary coils
antenna is just another dipole (similar to the ribbon-wire
antenna) with its tuned elements made of solid metal, but
with the advantage that it can be rotated. Stretch out each
of
"crossbar" portion of the T should be stretched out
or
the
receiver's
two
In
view of the excellent sensitivity of this receiver,
may
find that the ribbon-wire dipole antenna is all you
The
(1) A basic "rabbit-ears" indoor
its
two
arms to a length of 30 inches (75 cm), and orient
TERMINALS. This receiver is equipped
lug that is often provided on antenna
(V
, inch) of bare
conductor. To
reception,
antenna. For most local broadcasting stations a
may
interfere with reception;
local AM broadcast stations. But if you wish to
of
In
some
form of external antenna must be connected
get
you started. When you stretch out the
on the floor. The "vertical" section of the T goes
antenna
3000
input terminals.
of
recommended
or
tuning switches . Electrically, such an
connect
since
of
the AM antenna, in order to find the
distant AM stations, attach a long-wire
to
cases
the
wall socket.
place-on
terminals. Connect
strong local stations. But it is not
in
most cases you should use a better
the
antenna
the
rece
iver
of
the antenna
or
may
wooden-not
.)
You
the earth and as high as is
wall away from the
may wish to experiment
of
to
about 100 feet (30
effectiveness
may
also prove effective:
a wall , on the back
of
stations in different
options,
in
order
TV
antenna without
wire,
be
needed
does
not
may
be allowed
be tacked in place
metal-shelf.
in
that case the
the stations you
of a long
broad-
its
two
wires
of
increasing
have
is
·wire
of
very
to
a
the
th
of
them horizontally
45 degrees). The ribbon-wire emerging from the antenna's
base should be connected to the receiver's two
terminals in place
the receiver. Now, for each station in turn, after you tune the
station you can rotate the antenna for best reception .
(2) A more elaborate rabbit-ears indoor
with a tuning switch. This type of antenna does
greater sensitivity than the simpler rabbit-ears unit, so if
your problem is that the signals yo u want to receive are
weak and noisy, then an outdoor antenna is the only effective solution. But
signals are strong but are contaminated by reflected
tipath" signals that interfere with good reception, the tuning
switch
on
tion by reducing the interference.
a
a
(3) An
Technics Wing or
usually do not provide any advantage over the simplest type
of "rabbit-ears " unit for receiving weak signals. But where a
strong signal is contaminated
aiming and tuning controls can reject the interference and
yield cleaner reception.
(4) An outdoor antenna. Even the finest indoor
tenna, no matter
capabilities of a good FM tuner. For the lowest noise,
minimum distortion, and largest choice of well-received
broadcasts, an outdoor antenna is the best complement
to a fine tuner.
A roof-mounted antenna has three fundamental
tages. First, its large size yields better sensitivity (pulling in
a stronger signal from the desired station) and a narrower
directional pattern for more effective rejection of multi path
refle
ctions
on a roof or tall mast places it above many sources of
interference- other buildings, passing cars and buses, etc .
Third, the strength of received FM signals is directly
tional to the height of the antenna above the ground.
If you already have an outdoor television antenna, using
a splitter to extract
results . However, many
signed to be relatively weak at FM frequencies
minimize potential interference with
frequencies
a splitter to extract FM signals from
master
TV
results because many master antenna systems have
"traps"
to
The best choice is a directional FM-on ly antenna ,
mounted as high above ground as is practical, and
rated by
vert
at
ically and horizontally. A shielded lead-in cable will
mandatory
and to preserve strong signals during years
cable
The
300-ohm type.
directions (more than
be needed
If you are using a 75-ohm coaxial cable (either from
your outdoor antenna or from a master antenna system),
connect
have been fitted. Strip off about an inch
insulation to expose the shield wiring,
and twist its wire strands together, then strip off a half-inch
(1
any antenna connected to the
coaxial cable's center conductor
connect the coaxial cable's shield wire to the adjacent
ground (G) terminal.
cm)
it
of
or
at a shallow angle upward (less than
of
the ribbon-wire antenna supplied with
TV
in
cities and
an
elaborate
electrically tuned indoor antenna, such as the
B.I.C. Beam Box. Again, such antennas
how
elaborate, cannot fully exploit the
arriving
antenna system, but usually this yields poor
stop FM Signals.
may
as follows. First remove any connector that may
insulation from the center conductor. Disconnect
from
FM
(Channel 6
least two meters (7 feet) from other antennas,
in
most
locations,
be either 75-ohm coaxial or a shielded
If
desired stations are located in different
in
order to aim the antenna.
in
large buildings where
indoor
antenna
by
other
directions. Second,
signals from it may produce excellent
TV antennas are deliberately de-
in
the U.S.).
bolh
90 degrees apart) , a rotor wifl also
3000
may
improve
interference, the antenna's
TV
signals at nearby
You
may
an
apartment building's
to
minimize
of
(2
cm) of the outer
fold back the shield
terminals. Connect the
to
the
750
terminal and
3000
antenna
NOT have
"mu l-
recep-
an-
advan-
its
location
propor-
in
order
to
be able to use
sepa-
be
interference
weathering.
3
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