R
ARPA
E
FEATUR
ES
PHONO JACKS
These
two
jacks are intended for use with
magnetic cartridges requiring a
standard
47,000
Ohm resistive load. If a hum is heard when
playing a record,
try
reversing
the
polarity of
the
turntable
power plug. If this is ineffective,
connect
a separate ground wire from
the
turn-
table or record changer
to
the
CHASSIS GROUI\ID
binding post of
the
4270.
CD-4/AUX JACKS
These jacks are for
connection
of any 4-channel
high level
equipment
source. Manufacturers may
use
different
terminology
for
the
four
channels,
and care should be exercised to avoid confusing
the
signal channel terminations.
The
following
are examples of 4-channel
nomenclature
equiva-
lents:
LEFT
FRONT
LF-LF-CHANNEL - 1
TRACK
1
LEFT
REAR
LR-LB-CHANNEL - 2
TRACK
2
RIGHT
FRONT
RF-RF-CHANNEL - 3
TRACK
3
RIGHT
REAR
RR-RB-CHANNEL - 4
TRACK
4
TAPE MONITOR IN AND TAPE MONITOR
OUT JACKS
These jacks are for
the
connection
of a 2-channel
or 4-channel
tape
recorder.
(Refer
to
"SOURCE DEVICES", page 4.)
1\",
ANTEN NA
FM
ANfENaA
[iii]
[iii]
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, ,
, ,
: '
, ,
300
0 UNSHI
ElDED
~
TRAN
SMISSIO
N
lI
UE • ,
( TW I N L.EAD )
::
SINGLE WIRE
n
.1
ANTENNJl..
f M AN TENNA
[iii]
, ,
· , ,
·
·
,
,
.
.
,
:
-
....
_ SHIELD
75 0 COAX.
~SHIElO
3
00
0 SHIEL DED
TRANSMISSfON
TRAN SMISSION LINE
LINE
~
FM ANTENNA TERMINALS
These terminals
connect
to
an FM
antenna.
For
best FM reception, Marantz recommends a Log-
Periodic
antenna
mounted
on a good quality
rotor
system.
For
rural areas, it is recommended
that
a local dealer be consulted
about
antenna
installation and lightning arrestor protection. A
master
antenna
system is
not
recommended for
use with
your
Model
4270;
such systems are
usually designed expressly for television reception
and frequently suppress FM signals
before
distri-
bution. In addition, master
antenna
systems
often
severely limit
quality
FM reception. Where
outdoor
antennas
are prohibited or inconvenient,
use a simple form
of
300
Ohm TV " rabbit
ear"
antenna
or
the
simple ribbon-type folded dipole
antenna
supplied with
the
4270.
Both are prac-
tical and will give satisfactory resu Its in primary
signal areas.
Your Model
4270
will
accept
either
a
75
Ohm or
300
Ohm
antenna. (See Figure 11.)
The
300
Ohm
antenna
cable
should
be
connected
to
the
two
terminals marked FMon
the
ANTENNA
terminal. When using 75
Ohm
coaxial antenna
cable,
connect
its shield
to
the
" G" terminal, and
its inner or
center
conductor
to
either of
the
FM
terminals.
AM ANTENNA TERMINAL
This terminal
connects
to
an AM antenna.
The
4270
is equ ipped with a ferrite-rod
antenna
for
AM reception
and
it will give satisfactory results
in primary signal areas. However, an
outdoor
Figure
11.
FM/AM
Antenna
Connections
Figure
12.
AM
Ferrite-rod
Antenna
11
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