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..
F A I R C H I L D
DUAL
LINE
AMPLIFIER
MODEL
692
LA-30
--
I
B692
LA-30/2/71
INSTRUCTION
MANUAL
L---'-
\~
I
(~
-
IRCHILD
SOUND
EQUIPMENT
CORPORATION,
10-40 45th Avenue, Long Island City, N.Y.
11101
, 212 784-6163
'
).
I..
Page 2
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FAIR~
r-
ILD
MODEL
692/LA30
DUAL
LINE
.AYJPLIFI~R
G
ENERAL
Th
e MO
DEL
69 2LA/30
is
a
dual
line
amplifier
designed
to
de-
liv
er one
watt
of
power
into
a
~50
ohm
resistive
load
(+24db).
W
ith
op
tional
step
up
transformer,
it
will
deliver
a
maximum
of +30dbm. The
set
of
lo
w
distortion
line
amplifiers
utilize
silicon
transis
t
ors
arranged
in
a
complementary
symmetry
A
typ
e
ou
tp
ut.
The
unit
can
be
used
in
consoles
as
an
output
W
amplifi
er
or
in
any
application
where a
large
headroom
factor
i s
desired.
The
MO
D
EL
692LA/30
will
mount
in
the
FAIRCHILD
692R1'1
card
rack
fil
e
(o
r
any
other
typ
e
of
suitable
card
file
system).
Sin
g
le
ca
rds
can
be accommodated
in
the
FAIRCHILD
692SCH
s
in
gl e
ca
rd
holder,
which
in
turn
will
mount
in
the
FAIRCHILD
66
2RM
ra
ck
mountin
g frame
for
19"
rack
space.
CO
NNE
CTIO
NS
PIN 1
4
8
11
12
15
19
22
Audio
&
power
ground
(Amp.
1)
Audio
input
(Amp.
l)
Audio
output
(Amp.
l)
+48VDC
(Amp.
1)
Audio
&
power
ground
(Amp.
2)
Audio
input
(Amp.
2)
Audio
output
(Amp.
2)
+48VDC
(Amp.
2)
SPECIFIC
ATIONS
GAIN
Continuously
variable
from
0-51
db
30HZ
-
15HZ
+
1/2
d~
-
FREQU~NCY
RESPONSE
DISTORTION
SIGN
AL-TO-NOISE
INPU
T
IMPEDANCE
OUTPUT
IMP.!illANCE
PO
W
ER
REQUI~S
SIZE
20HZ
-
20KHZ
+
lei:,
0.2% max. 85db
below
max.
output
lOK
3
ohms
l
(
,:l..Q.....
, ,
...,,
·
48VDC@
55ma
max
each
amp.
- @
15ma
quiescent
each
amp.
3'V2x5xl
thick
Page 3
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R6
IK
11,22
,----...,_.
___
....,.
___
_,W\r---------------------------------,r,a.,__---0
+48VDC
15
MA
QUIESCENT CURRENT
55 MA MAX.
RI
330K
Cl
2/50
R3
IOK
QI
40407
4,150---:-j
t-+-
.....
----t--1
INPUT
R2
IOK
C2
2/50
C3
32/64
R5
50K
RIO
15K
Rl2
220
Rl4
6.8K
03
40406
Rl7
5.6K
06
40410
DI
IN2482(F2)
05
40409
I
CG
I
EXTERNAL
XFORMER
500/50
I
105
:
600
~;;
Co,:b:i,J
[
1,121
Tl
: FRECO 8-86511
I
OR
EQUIVALENT
1,12
<.>----------~----------~--------------------------------
.....
--
....
NOTE:
I-
UNLESS
OTHERWISE
SPECIFIED
ALL
RESISTORS ARE IN
OHMS,
1/4
W
ALL
CAPACITORS ARE IN MFD .
SCHEMATIC DIAGRAM
30
DBM
LINE
AMPLIFIER
I
/2
692
LA-30
8-97164
-
-
~
Page 4
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WARRANTY
&
SERVICE
POLICY
See
standard
warranty
attached
to
and
forming
part
of
this
manual.
To
validate
warranty,
complete
and
return
the
war-
ranty
registration
card
provided.
If
there
is
any
question
on t h
is
or
any
other
FAIR
CHILD
professional
product,
please
do
not
hesitate
to
contact
the
factory:
FAIRCHILD
SOUND
EQUIP
M
J:NT
CORPORATION
, 10
-40
45th
Avenue, Long
Island
City
,
New
York
11101.
SCHE~!ATIC
No.
-
-
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◄
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•
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INTEGRA
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PC
BOARD
MOUNTING DIMENSIONS
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SWITCH
CARO
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ATT~NI/ATOR
CARD
A-96297
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