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be a monophonic
crystal
cartridge or tv
sound.
Plug
a
monophonicsource
IntoAUXlLlARYAI,
leaving the
AUX-
ILIARY
A2
input
unused.
Note
that the input
impedance
at
all
these high level
inputs
is
0.
5
megohm,
w4iich
is
too
low
for
ceramic
cartridges requiring
2
to
3 megohms
input
impedance.
For
ceramic
cartridges,
use the
MAG.
PHONO
inputswith the simpleodoptor networks
recom-
mended by
the manufacturers.
For
stereophonic
crystol
cartridges (Ronette "Binofluid"
OV
turnover
and BF40sin-
gle needle), the
0
.
5
megohm
load provided
at
the
high
level inputs
is
exactly the loading
impedance
required.
5)
AUXILIARY
Bl,
AUXILIARY
B2:
Same
os for
AUX-
ILIARY Al,
AUXILIARY
A2
obove.
6)
AM:
This input
is
intended
for
AM
tuner or the
AM
output
of
an
FM-AM
tuner
where
the
FM
and
AM
sections
are independent.
7}
FM;
This
Input
is
Intended
for
an
FM
or
FM-AMtuner
where
the
FMond
AM
sections are
not independent.
Also
the
main
carrier or
equivalent output from an
FM
Multi-
plex odaptor.
NOTE:
A
shielded
coble with a
shielded
"phono-type"
plug should
be
used
to
connect
from
eoch
of the
otove
mentioned
sources
to
the corresponding amplifier input
jack. Unless
the source hos
a
low-impedance
output such
as
a
cathode follower
(with
which up
to
50ft.
of coble
can be
used),
use the
shortest possible
connection
and
low-capacity
shielded coble (cable
having
os
low
os
25
mmfd
capacitance
per foot
is
available).
b)
OUTPUTS
TO
TAPE RECORDER:
The
TAPE
OUT
CH.
1
and CH.
2
faeks
permit feeding the
channel
1
and chan-
nel 2ilgnals
to
a
stereo
tape
recorder.
With a
meitophonic
source
connected
to
a
channel
1
Input,
the
TAPE
OUT
CH.
1
jack
is
used
for
feeding out
to
a monaural tape
re-
corder.
Lew-capacity
shield
audio cobles
wIthRCA-type
phono
connectors
at
the
end
may
be used
in
lengths
up
to
50ft.
to
connect each
jack
to
the
tape recorder
ir^juts.
Note
that
any
inputs
chosen
by
the
SELECTORswitchfeed
out through
these jocks.
All
inputs
ore affected
by
the
LEVEL
control
and
the
LOUDNESS
compensation
switch,
but not the
tone
controls.
c)
SIGNAL
CONNECTIONS TO MAIN
POWER
AMPLI-
FIERS:
The
PREAMP
OUT
CH.1
and
CH.2|acks
are
eoch
connected
to
the input
of
a basic
power
amplifier*.
The
two
basic
power
ampllfien
may
be
separate or
combined
on one
chassis.
Low
capacity shielded audio cables with
RCA-type
phono
connectors at the ends should
be
used
in
lengthsupto
10 feet normally.
If
the
cable cc^ocity
is
os
low
os
25
mmfd
per
foot,
lengths
up
to
40
feet
may
be
used
if
necessary.
However,
the
shortest possible
cable
length
should always
be
used.
*
NOTE:
If
the user already has
an
integrated amplifier
from
his
original
monophonic
system,
it
may
be
used
os
a
basic
power
amplifier
by connecting
to
one
of
its
high
level inputs (tuner, radio, auxiliary), setting
its
tone
con-
trols
to
the
"flat" positions,
its
loudness
compensotlon
control
or switch
(if
ony)
to
where
it
has
no
affect,
ar>d
its
level control
to
maximum.
In
the
case
of the
EICO
HF12, HF20,or
HF32
integrated ampl1fiers,a
more
direct
connection
to
the
power
amplifier sections
may
be
made
by
connecting
to
the
TAPE
OUT
jacksof
these
units,
set-
ting the
LEVEL
control
and
LOUDNESS
control
(if
any)
to
maximum.
In
the
case
of the
EICO HF52
integrated
amplifier,
connect
to
the
ELECTRONIC CROSS-OVER
OUTPUT
jack
and
snip
the
connection
between
the
ELEC-
TRONIC CROSSOVER
INPUT
& OUTPUT
jocks
inside
the
chassis;
the control
settings
on
the
HF52
ore then
im-
material.
ElCOnowoffers
a complete
lineof
basic
power
ompi
if
iers
which
maybe
used
in
pairs for stereo.
Included
ore the
HF60
(60watts
roted)
HF50
(SOwatts
rated),
HF35
(35 watts
rated),
HF22
(22 watts
rated),
and
the
HF14
(14 watts
rated).
d)
POWER CONNECTIONS:
The power
cords of the
basic
power
amplifiers,
the
tumtoble, and
the tuner
may
be
inserted
in
the
convenience
outlets
provided
on
the
rear chassis apron.
The
receptacle
marked
117VAC
is
intended
for
use primarily
witha
phonograph and
provides
1
17VAC
regardless of
whether
the
power
switch
of
the
amplifier
Is
turned
on
or
off
In
order
to
protect the
phono-
graph
mechanism.
The
receptacle
marked
117VAC
SWITCHED
is
"llve"or''dead"depending
on whether
the
preamplifier
power
switch
it
turned
on
or
off
and
is
in-
tended
prlmarilyfor
use
with
the basic
power
amplifiers.
The recommended method
Is
to
plug
the line
cord
of
one
basic
power
amplifier
into
the
117VAC SWITCHED
re-
ceptacle
of the
HF85ond
the line
cord
of
the other basic
power
ompllfler
into
either
convenience
receptacle
on
the
first
power
ompllfier.
Tunersond
otherdevleei which,
may
be
turned
on and
off
with
the
preamplifier
power
switch should
be plugged
Into
the remaining receptoeles
on
the basic
power
amplifiers.
HUM
ADJUSTMENT
Aftercheckingthe
preamplifier
for
proper operation, re-
move
all
input cables
to
the preamplifier
and
make
the
following
control settings
which
hold throughout
the
proc-
ess
of
hum
adjustment:
SELECTOR
switch
at
PHONO,
MODE
switch
at
STEREO
NORM.,
both
LEVEL
controls
ot
10,
LOUDNESS
compensation
switch
at
OFF,
both
BASS
controls at
0,
both
TREBLE
controls
at
-5.
The
pre-
amplifier should
be connected
to
the
two
basic
power
amplifiers
which
must
in
turn
be connected
to
the
two
speaker
systems.
The two speokersystem
must
be
in
phase
and placed
near
one
another
for
this
adjustment.
Connect
theline cordsof
the
two
basic
power
amplifiers
as
recom-
mended
in
POWER
CONNECTIONS
above.
Plug the
preamplifier
line
cord
Into
a
1
17VAC
wall
outlet.
Touch
one end
of
a
length of
hook-up
wire
to
the
preamp
chassis
and check
for
a
spark
when
the
other
end
Is
touched
to
an
unpointed
chassis
point
on
both
power
amplifiers.
If
a
spark occurs
in
either ctse, reverse the
prong
position
of
the
line
cord plug
for that
power
amplifier.
Now
place
your
ear close
to
both loudspeokers
and
listen to
the
hum
level.
Reverse the prong posltionof
the preamplifier line
cord plug
in
the wall outlet
and
listen
again.
Choose
the
prong
position
glvlngthe
least
hum.
Now
connect
the
5
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