ST4QPAGE
4
CH.2
Low Level
Inputs
PHONO A2
PHONO
B2
TAPE
HEAD 2
CH.2
High Level
inputs
AM
2*
(See note)
Multiplex
2
TAPE
2
All high
level inputs
provide
the same
gain and flat
frequency
response..
Low level
inputs
provide
much
higher gain and
the prescribed
gain-frequency
char-
acteristics
of R1AA for
phono
and N
ARTB for tape
head*
Monophonic
sources,
such as FM
tuner, AM
tuner, or
monophonic
phono
cartridge, are
plugged into
Channel
1 inputs*
Stereophonic
sources,
such as stereo
phono
cartridge,
stereo tape
heads,
or FM,
Multiplex
(MX)
adaptor, are
plugged
in
as
follows:
left
channel Into
channel
1 Inputs;
right channel
into channel
2 inputs*
*(npuf AM 2 is
provided against
the possibility
of AM-
AM stereo*
AM 1
is the normal
AM tuner input*
Setting
the
SELECT
OR switch to FM-AM and
the
MODE
switch to
STEREO
or REVERSE takes
care of feeding
two normally
monophonic
channel
1 inputs (FM tuner
and AM tuner)
one to
channel 1 and the other to
chan-
nel 2 for FM-AM
simulcast stereo*
PHONO
The PH.
A
input jacks 1
&
2and
the PH.
B Input jacks
1 &
2
permit the use of
two magnetic
cartridges
in
your
system. One cartridge
can
be a
stereo
type
and
the
other monophonic
or both can
be stereo. One cartridge
can
be
in
a
turntable,
and the
other in a record changer
or an
inexpensive
phono for
children's use. A
mono-
phonic cartridge
is plugged into the
channel 1 input
only*
When
playing
a
monophonic
recordwitha stereo cart-
ridge,
set the
MODE switch to the
MONO
1-2
posi-
tion, specifically
intended
for this purpose.
In
the
MONO 1-2
position,
the channel 1
and
2 Inputs
are
fully
blended
internally,
and
the blend is fed to both
amplifiers.
The
purpose here Is to
cancel extraneous
vertical
noise
components
in the cartridge
output*
When
playing a
monophonic recordwitha
monophonic
cartridge,
set the MODE
switch to MONO
1,
the
normal
monophonic
position at
which th^ channel
1
input is fed
to both
amplifiers*
»
The
load
presented
to the cartridge
by the
PHONO A
inputs
is
lOOKCi*
The
load
presented
to
the
cartridge
by
the PHONO
B inputs is47KQ.
The choice
of load
impedance permits
accomodation
of most popular cart-
ridges* Most
popular cartridges,
including all
Shure
and the
Pickering
381A
require
47KQ load. The
Picker-
ing
380A,
however,
requires
100KQ
load.
If
the
Weathers
C501-D
cartridge
is used, connect a
180KQ resistor
in
series fol lowed by a
33KQ resistor
in
shunt,
to each
output.
Plug into
PHONO A
inputs*
This
network
avoids
overloading
the preamplifier
inputs.
^
TAPE HEAD
The TAPE HEAD
1
&
TAPE HEAD
2 input jacks
permit
the
connection of a tape
deck
having
no playback
preamplifiers
to the
unit* The
tape
head
should be of
the conventional
high
impedance,
high output type
normally
supplied
in decks without playback electron-
ics.
if the head is of the stereo
type, connect the
upper track output to TAPE
HEAD
1 and the lower
track
output to TAPE HEAD
2
,
If the head
Is of the
monophonic type, connect
the output
to
TAPE HEAD
1.
The
load
presented
to the tape head by each
input Is
1
megohm.
FM TUNER
The FM 1 input jack is for connection of an
FM
tuner.
AM TUNER
The
AM
1 input jack is
for
connection
of an AM tuner.
Do
not use AM 2 for
this
purpose,
FM
MULTIPLEX ADAPTOR
The
MX land
MX
2
Input jacks permit the connection
of an
FM
Multiplex adaptor*
Any
adaptor
will
provide
a
left
channel output
anda
right channel output. The
left
channel output
is connected
to
MX 1 and the right
channel
output
to MX 2.
,
/
TAPE
The TAPE
1
and TAPE 2
input
jacks
permits
the
con-
nection of
a
tape
machine
complete
with
playback
preamplifiers.
If
the
machine
provides stereo
play-
back,
connect the
upper
track
output
to TAPE
1,
and
the
lower
track
output
to TAPE
2. If
the
machine
is
of
the
monophonic type,
connect
the
output to TAPE
1,
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