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Rock
Mount
ed
Models
Mount these versions of
the
equipment
on
a standard 19-inch relay
rack
with
the
mechan-
ical assembly above the
main
electro
ni
c panel.
POWER
CONNECTION
Connect the power
cab
le
from
the a-c
POWER
input
connector,
J8
,
on
the
electronic
assembly to a conveni
ent
115 volt a-c power
source.
OUTPUT
A
mating
connector
for
LINE
OUTPUT is
supplkd.
The
user
must
fabricate hjs
own
cables, using the connectors supplied with the
recorder.
Studio Line
Plus 8 v-u, 600
ohm
line
output
, bal
anced
or unbalanced. is
ava
ilable across terminals 2
and
3
of
the line
out
connector, J
5.
Pin 1 is the
chassis ground.
If
unbalanced
output
is
desired, wire the
mating
connector so
that
the
pin
2 side of the
line is tied to
ground
or
tie A to B
at
TSI.
Supply
600
ohm
t
er
mination
to this
output
at
all times
to
maintain
cmTect meter calibration while
recording
or
reproducing. If
the
ou
tput
is
not
feeding a terminated line,
or
if
the
outp
ut
is
not
connected,
such
as on r
emote
pickups, the
line
out
termination switch, S4,
mu
st
be
l
eft
in
the
ON position.
+
408
(O
VU
~-
7
Center
tap
grounded balanced
output
and
strapping
for
4VU
output.
2-3
To obtain a ce
nt
er tap, grounded
balanced
output, s
trap
the
black le
ad
of
transformer
T3
to ground at the tie
point
shown
in
the illustra-
tion.
Plus 4 v-u
output
can
be achieved
by
un
-
strappjng
D
and
E
at
transformer
T3
and
strapping
E to F. Re
adjust
the record calibra-
tion according the to instructions
in
SEC-
TI
ON
7 ALIGNMENT AND PERFORMANCE
CIIECKS.
High
Impedance
Amplifier
Input
Wire t
he
matin
g connector so
that
pin
3 of
the li
ne
out
co
nn
ector, J5 is connected to
the
high
side
of
the
amplifier input.
Strap
pins
1
a
nd
2
of
the
mating
connec
t
or
for connection
to the grou
nd
s
id
e
of
tbe
am
plifi
er
input.
Th
e
line
out
termination
switch S4,
must
be le
ft
in
the ON position
at
all
tim
es.
INPUT
Dur
j
ng
this discussion
refer
to the foldout
illustration - Schematic Di
agra
m-Electronic
As
semblies
at
the
back
of
SEC
TI
ON 7,
Microphone
Input
Any low
imp
edance microphone
hayjng
a
nominal
imp
eda
nc
e between
30
and
250
ohms
can
be plugged directly
fato
the
equ
ipm
en
t.
Wire
the
mating
connec
tor
so
that
the
mi
cro-
phone is connected to
pins
2
and
3 of LINE
I
NPUT
, Jl. The
cab
le shield
mu
st
be
connected
to
pin
1. Place
the
input
transfer
switch, Sl,
in
the
MIC position,
LI
NE.
INPUT
s-1
INPUT
TRANSFER
MICROPHONE SWITCH
BALAN
CED
~'
J~-•-+-
--
BR~IO(;E~--o!
>-------v-
-
,o
-
RI
~~~o'olr
~O
621(
R~
47K
RZ.
R3
22
Z.2
Microphones
with
50
ohms
or
less
imped
ance.
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