Langevin
~
INSTALLATION AND
SERVICE MANUAL
TYPE 128X SERIES
AUDIO
20 Watt AMPLIFIERS
TRY 1H1S SAMPLE
NEW INSTANT LETTERING
DYELINE HEAT RESISTANT
J' ,Jt'JLht\
1 pr - Sl:Z._
• EASY TO HANOU.: ·o· X ~;" r
SHEET
•
<;r
LANGEVIN, DIVISION OF SONOTEC, INC.
503 SOUTH GRAND AVENUE/ SANTA ANA, CALIFORNIA/ PHONE: (714) 547-6204
APRIL,1957
SERVICE-AND INSTALLATION MANUAL FOR
LANGEVIN TYPE 128X
SERIES AMPLIFIERS
GENERAL
The Langevin Type 128X series amplifiers are 20-watt units designed for operation in high-quality
sound systems. Design features make these amplifiers adaptable to the varied requirements of sound installations. These features include interchangeable input panels for line matching or bridging, for
impedance microphone or phono pickup inputs of 30 or 250 ohms impedance, for high-impedance inputs, such
as high-impedance microphones, phono pick-ups, and radio tuners, and for broadcast-type monitor use.
These input panels, while interchangeable, must be mounted on the basic amplifier and
circuit. The low output noise level and low internal output impedance permits the use of the 128X amplifier as
bridged in large sound installations. The Type 128X series amplifier can be either rack or cabinet
mounted.
GENERAL CHARACTERISTICS
amplifier are dependent upon and vary with the
particular type of input panel in use. These electrical characteristics are given in detail in the
following service data for the individual input
panels.
amplifier consisting of a 6SJ7 voltage amplifier,
a 6V6 phase inverter and driver, and push-pull 6L6
tubes in the final power amplifier stage. Quiet,
low-distortion performance over a wide fre1uency
range at rated power output (20 Watts) highlights
the electrical characteristics which make
amplifiers desirable where fine sound reinforce-
ment or reproduction is required,
a power unit to drive a low impedance buss across which a number of power amplifiers can be
BASIC 128X AMPLIFIER
The electrical characteristics of the 128X
The basic 128X amplifier is a three stage
these
All transformers are especially made for
these units in our own transformer shops, to insure full control over the manufacturing process,
including winding, impregnating, potting and test-
ing. Potted coils
characteristics despite variations in temperature
and humidity.
Electrically, this amplifier has low noise
level (78 db below full output) and excellent
transient response. Each amplifier is tested for
distortion at rated output over the entire fre-
1uency range from 50 to 15,000 cycles, assuring
full performance at
as over
with the particular conditions existing at
time of measurements, such as type of equipment
used and variations in line voltage, the values
given are to be considered as average values and
may vary by an appreciable amount. Tnese figures
will be valuable as references in
ice checks on the amplifiers.
the miJdle range.
Since gain-per-stage measurements will vary
assure longer life and uniform
tne frequency extremes as well
wired into the
ma~ing the serv-
low-
the
1
Good regulation of output is provided in the
Langevin 128X series by the very low internal out-
put impedance. The change in output level from a
condition of no load to a condition of full load
is only
I db. In addition, a new circuit, incor-
porating direct coupling between the voltage amplifier and phase splitter stages, minimizes
circuit components and provides maximum gain and
reliability.
The power supply uses a 5U4G rectifier tube
and is filtered so that less than O.
1% ripple is
present
in the output of the B supply. The power
transformer is tapped with different input terminals for the 105-115 V range, and the 115-125
V
range, thus assuring a constant value of B voltage
over this wide range of input voltage.
The outJ:llt transformer is tapped so that
loads from 1 ohm up to 1200 ohms may be matched
for maximum output power.
Chassis
la.rout has been arranged to reduce
interconnecting wiring to a minimum, thus providing maximum accessibility to all parts and connections. The chassis is constructed of 16 gauge,
bonderized steel, finished inside and out
with
baked-on grey enamel. Components have been selected with high safety and overload factors, thereby
providing economical operation by reducing service
calls. The 128X amplifier can be mounted on a
standard 19 inch equipment rack or it can be housed
in a wall - or shelf - mounting cabinet.
128X SERIES AMPLIFIER ELECTRICAL CHARACTERISTICS
FREQUENCY
OUTPUT NOi SE
INPUT
HARMONIC
UNIT SOURCE
MAXIMUM RESPONSE
BELOW FULL
SIGNAL DISTORTION
GENERAL
DESIGNATION
IMPEDANCE OVER-ALL SAIN
30-ISOOO cps OUTPUT LEVEL
LEVEL·
50- I 0000 cps INFORMATION
128X-A
600
ohms 63db matching
± 1.0 db
78 db
-20 db11 20
,rat ts 1 ess
Provides for line
600 ob11s 600
ohu 45db (600 Ohll
than
29' 15
1 evel
input
bridging
bridging 600 input)
watts less
ohms
than
19'
12SX-B
30 or
250 103 db
± 1.0 db
55 db
-60 dbm Same as 12SX-A
Provides for low im-
ohms
pedance inputs. Volu11e
controlled r .. otely to
a distance of 5000
ft.
12BX·E
l 11eg ohm
116 db
± I. 5 db ( from 60 db
13
IIV at
Same as 128X-A
Provides for high imped-
100,000 ohm
400
cps llnce inputs. crystal
source
11icrophones or other
impedance)
high
110pedance lo,r
1 evel signal source
128X·H 6800 oh11s 103 db See Fig. A 55 db
5. 8
!IV Same as 128X-A Provides for General
input fro•
at 400
Electric variable
variable
cps
reluctance pbono pick-
reluctance
up or Pickering·
tyr,e phono
cartridge pick-up
pick-up
:
'
128X·J
I n,eg ohm
76 db
± 1. 5 db
60 db
l-G vol ts
S8111e as
128X· A
Provides for high i111ped
(max.)
ance input for radio
tuners
and equivalent
1 npu t devices
128X·R
"T0 pad
62 db
± 1. 0 db
73 db
• 20 db11
Same as l 2SX-A Monitor Mplifler
matched to
30,
150.
250 or 600
ohms
128X· Q 30, 150, 62 db
± 1. 0 db
75 db
-20 db,q
Sa~e
as 128X ·A
Mont tor or Booster All-
250 or 600
pl! fler for recording
ohms
or sound
systems
2
128X BASIC AMPLIFIER
l--x45-i-----X0.8-----xs.4---X0.28
400
llCAIN DATA
1r--4----------t----;::====t::==::;---,
• I
C9
CHASSIS
g
-:-
C4
+
b
RZ
* APPROX. GAIN PER STAGE
USING VTVM, AT A LINE
VOLTAGE OF 117 VOLTS
INPUT POWER: APPROX.
120 V.A. AT
117 V. 60 CPS
R8
+
C3B
C3A
R3
+
A.C.
INPUT
ACROSS 600J'l
WINDING OF OUTPUT
I 1/3
:&Lee
I
I
I
I
I
I
I
I
STRAPPING
N
FOR
soon
A
For 105-115V Input-Connect leads at transformer to
For 115-125V Input-Connect leads at transformer to
e
f' TO ALL HEATERS
VOLTAGE AND RESISTANCE OF
BASIC 128 AMPLIFIER
TUBE
6SJ7
(VI)
6V6
(V2)
6L6
(V3)
PIN
-1-
VTVM
Gnd 0
3. 15 AC
2
+ 1. 2
3
0
4
+
5
+45
6
1. 2 lK
7 3. 15
8 +72
Gnd 0
1
3. 15
2
+225 24K
3
+225
4
+72
5
6 NC
3. 15
7
+85
8
1
Gnd 0
3. 15
2
+420 15K 6
3
+320
4
0
5
6 NC ALL VOLTAGE AND RESISTANCE MEASUREMENTS
7 3. 15
+26 260 Ohms
8
RESISTANCE
AC
AC
AC
AC
AC
0.09 Ohms
lK
Open
1. 2 meg
0.09 Ohms
300 K
Ohms
0.09
011-0FF
24K
300K
0.09 Ohms 6L6
lOK
0.09
Ohms
(V4)
Gnd
I
2 3. 15
+420
3
+320 13K
4
0
5
NC 6
13K 7 3. 15
100 K
0.09 Ohms
+26 260 Ohms
8
REa>ECT TO CHASSIS GROUND, WITH A LINE VOLTAGE OF
117 V. A.
AC
AC
C-. 600 OHMS LOAD ACROSS OUTPUT.
R4
00@
@
FUSE
OO 6Y6
RIA ANO Ria
0
0.09 Ohms
5U4G
(VS)
15K 3 NC
I00K
Ohms
0.09
TZ
NC
1
+440
2
380AC
4
NC
5
380AC
7 NC
+440
8
Fig.
15K
RMS 120 Ohms
RMS 120 Ohms
15K
MADE IITII
3
INPUT PANELS FOR LANGEVIN
AMPLIFIER TYPE I 28X SER I ES
In the design of the 128X seri~s of ampli-
fiers, provisions have been made for two input
channels. These channels are furnished as 3eparate
input panels which are interchangeable on the am-
piifier. Six different types of input panels are
avail~ble, any two of which may be used at one
time. The type numbering of the 128X series varies
with the input panels connected to the
basic am-
plifier unit.
For example, the basic unit with a
line level iriput panel type A, would be a 128X-A
amplifier; with a line level input panel Type
A,
and a high-impedance pre-amplifier panel Type E,
it would be a 128X-AE. A basic amplifier with two
low impedance pre-amplifier inputs Type B would be
a
128X-6B, etc. The input panels and their desig-
nations follow.
DES I GNA Tl ON
TYPE A
DESCRIPTION
Line level input panel with transformer connections for matching
600 ohms, or bridging 600 ohms
(equipped
with volume control).
TYPE B
TYPE E
TYPE H
TYPE J
•TYPER
TYPE Q
Pre-amplifier input panel for
source impedances of 30/250 ohms
(equipped with volume control).
Pre-amplifier input panel for high
impedance inputs (equipped
with
volume control).
Preamplifier, equalizer input panel
for variable reluctance type pickup
(equipped with volume control).
Input panel for high impedance inputs such as radio tuners or their
equivalent (equipped
with volume
control).
Input panel for monitor (broadcast
use) for source impedance of
30/150/250/600 ohms.
Input panel for monitor or booster
use for source impedance
of
30/150/250/600 ohms.
INSTALLATION INSTRUCTIONS
FOR THE I 28X BASIC AMPLIFIER
ELECTRICAL CONNECTIONS
Before the 128X amplifier can be placed in
operation, the following electrical connections
must be made in order to apply a-c power for
operating voltages,
.and to provide an output load
for the audio signals.
l. Connect an a-c power cord to the two
terminals on the a-c input terminal strip
shown in Figure
3.
2. Connect the required output load (loudspeaker's or
other)· to the terminals on
the amplifier output terminal strip
(Fig.
3).
The manner in which the input signal devices
are connected is described in the text on the in-
dividual input panels.
OUTPUT IMPEDANCE STRAPPING
Connect the output leads to the terminals
marked A and Bon the output terminal strip (Fig.
3). Bring the leads into the amplifier by punching
out the
kno~kout on the rear-right side of the
chassis.
The amplifier is shipped with output imped-
ance strapping for
600 ohms as shown in the basic
schematic diagram, Fig. 2. Strapping for other
output impedance values is shown in the following
chart.
4
NOMINAL
LOAD
IMPEDANCE
600
150
32
16
8
2
LOAD IMPEDANCE
'I\ORKING RANGE
300 to 1200
70 to 300
20 to 70
10 to 20
3 to 10
1 to 3
TRANSFOR~
STRAPPING
5-9, 8-11, 10-14
5-9, 7-11, 8-12, 10-14
6-9, 8-11, 10-13
6-9-11, 8-10-13
6-8-11-13, 7-9, 10-12
6-8-10-12, 7-9-11-13
INSTALLATION & MOUNTING
DATA
A Langevin Type 1201 cabinet is available for
this amplifier. The cabinet can be placed on a
table or a shelf or, if it is desired, mounted on
wall or other flat surface. For
wall mounting, two
right angle mounting brackets are supplied with
the cabinet. These brackets are fastened to the
cabinet, as shown in
Fig. 4, before installing the
amplifier chassis,
The brackets contain two sets of mounting
holes along the side that fastens to the cabinet.
This allows the cabinet to be mounted spaced from
the wall, or flush against the wall, as desired.
To install the amplifier chassis in the cabi-
net, proceed as follows:
Slide the amplifier chassis into the cabinet
with the end flanges of the chassis between the 2
end rails on each side of the cabinet interior.
Bolt the chassis into place, using the
provided in the end rails.
.
•
e
Fasten the cabinet cover into place by means
of the
mounting clips, whichever are used.
2 knurled panel screws, or by the spring
2 holes
Remove the volume controls, power switch, ana
the pilot light from the chassis and fasten them
in the corresponding holes on the two mounting
brackets. Note that these components are mounted
directly on the brackets and are not fastened to
the mat panel.
To effect the modification, mount the narrow
bracket with the
strip as shown in the diagram (Fig. 5) and bolt it
into place by means of the two existing bolts in
the bottom of the chassis. Remove the power es-
cutcheon plate from the chassis exposing two small
mounting holes. Mount the remaining bracket as
shown in Fig.
holes. Place the amplifier chassis in the rack and
bolt it into place using the extreme top and
bottom slots on the end flanges. Place the mat
panel over the chassis and bolt it to the rack
through the two center slots on the flange. Mount
the two escutcheon plates
to the left facing the rack and the pilot light and
on-off switch to the right as
2 small holes over the resistor
5 by means of these small mounting
~ith the volume control
shown in Fig. 5.
RACK MOUNTING
When the amplifier is to be rack mounted,
Modification Group Type 21 is required. This modi-
fication kit includes brackets
switch, pilot light, and volume controls; and a
panal.
mat
to remount the power
- --------- ---------- --------
•
I Fig. 5 /
5
INSTALLATION OF IHPUT PAHELS
INPUT
PANEL TYPE
A
'f'[LLOW
..
,.,.
TO 9
Tl
400-0
.....,T1'11AN,,,
fOOlrilOM .. -"L
C,tAMG( O·Z~I
r·
600 NOINIAL
t'lAfifG( 0·1000~
I Fig.
6 I U,or
0(0
INSTALLATION
..
..,.._
...
••
lOO•
..
roa
••
·2~·
VOL CONT.
'--...+-'-------~q
l\.ut
Mount the input panel in the space provided
at the lef.t hand side of .the amplifier chassis
when facing the front of the amplifier as shown in
Fig. 1. Select any 3 terminals not in use on the
basic amplifier terminal strip. (7, 8
and 9 are
used here for demonstration.) Connect the indicated points on the
A input panel resistor strip
(Fig. 7) to terminals 8 and 9 on the input termi-
INPUT PANEL TYPE B
,o~
-T
tt0-60.J\.)
TO
"(ltllOT[
VOL. co .. t
INSTALLATION
••
510A
OT
••
..
..
,, 101(
VOLUIIIE CONTROL~
••
..
..
TOb
,..
''°"
.,.
!'tEO OOT
...
2~V DC
\It&
I
Fig.
s I
Connect the filament leads of the B panel to
the filament lugs
"e" and "f". Connect the red-dot
terminal on the resistor strip to point "b" shown
on the schematic for the basic amplifier;.Fig. 2.
Connect one side of the 0.05 mfd capacitor
(sup
plied) to the green-dot terminal on the resistor
strip and the other side of fhis capacitor to point
"a" on the basic amplifier schematic. Connect resistor R9 from point
"a" to ground of basic ampli-
fier.
When unbalanced input is used, ground terminal
1 of the input transf~rmer.
Select any four adjacent terminals not in use
on the basic amplifier input terminal strip
(for
demonstration purposes we shall select terminals
1, 2, 3 and 4). Connect terminals 1, 2 and 3 of
the input transformer (Fig. 8) to terminals 1, 2,
3 respectively, of the input terminal strip. Connect terminal
4 of the input terminal strip to the
white dot terminal on the B resistor strip, and
to the right-hand lug on the volume control (as
viewed from the bottom with lugs upright).
6
0
0
Fig. 71
,-----,-.::+-=:....- TO 7
F":i~....,..-TO 8
r.:, ,,.......,...
ra--t--+-'--T09
VOL. CONT.
ON CHASSIS
TO a
R5
TOg
nal strip of the basic amplifier. Tile unattached
lead No. 3 from the input transformer connects to
terminal 7 on
the basic amplifier terminal strip.
Mount the volume control in the space provided on
the left front side of the amplifier chassis, and
connect it to the input panel resistor strip and
to points
"a" and "g" on the basic amplifier as
indicated in Figures 2, 6 and 7.
GREEN DOT
BLACK DOT TO g
1612 OR 6L7
\
GREEN DOT
0
TO b e f"
ELECTROLYTIC I . '-WHITE DOT TO RIGHT
C 1, C 1A, C
18 Fig,
9
I HAND LUG OF V. C.
Terminal 10 on the input terminal strip should
be grounded at all times. Connect terminal 10 to
the black-dot terminal on the B resistor strip
and also to the center terminal on the volume con-
trol. Connect the 20 Kohm resistor, RS, across
the outside terminals of the volume
r,ontrol.
VOLTAGE AND RESISTANCE
OF B INPUT PANEL
TUBE PIN
1612
1
or
2
6L7
3
4
5
6
7
8
Grid
Cap
VTVM
GND
3. 15
+215
+60
0
NC
3. 15
+25
0
*Varies
with V. C.
Setting
RESISTANCE
0
vac
0.09Q
v.
350K
v.
SOK
520K
vac
0.090
v ••
20K *
520K
INPUT PANEL TYPE E
.--+--.--Toa
CJ
~
0"""1T
..
. ..., ..
~:.!:...!?~--;.:;,..-L...;:;.~~:;.__i.,;;::.._,.,r_=---roo
510t'l .Dk tSOK 41 K ~ DOT
AiCi,HT HAN0LUC. Of''lC. 11,v DC
....
I Pig. 1oj
INSTALLATION
Select two terminals on the input terminal
strip (for demonstration, assume terminals 4 and
6). Connect the black-dot terminal on the E resis~
tor strip to input terminal 6, then connect
termi'nal 6 to terminal 10 (ground). Connect the
white-dot terminal on the E resistor strip to input
terminal 4, and connect 4 to the right-hand lug on
the volume control (viewed from bottom with lugs
upright). Connect the center lug of the volume control to ground. Connect the 20 K resistor across
the outside terminals of the volume control. The
filament leads are wired to
case of the B panel, and the red-dot terminal on
E strip is connected to point "b" shown on tbe
the
basic schematic. Theo. 05 mfd coupling capacitor is
connected from the green-dot terminal on the re-
sistor strip to point
"e" and "f" as in the
"a" on the basic schematic.
TO
a
TO
g
REDD
/
ELECTROLYTIC
C1A,C1B,C1C
Connect resistor R9 from point "a" to ground of
the basic amplifier.
TO b
GREEN DOT
L_WHITE DOT TO RIGHT
f' HAND LUG OF V. C.
I Fig. 111
VOLTAGE ANO RESISTANCE
OF E INPUT PANEL
TUBE
1612 1
<>r
6L7
Grid Cap
•varies
with V. C.
PIN
2
3
4
5
6
7
8
VTVM
GND
3. 15
+220 v.
+76 v.
+44 v.
3. 15 vac
+44 v. •
0
setting
vac
RESISTANCE
0
0.09Q
390K
SOK
20K
0.09Q
20K •
lMQ
TO
g
INPUT PANEL TYPE H
½vr·6SL1
vttlOW
""'
'"P\J'T
••c•...-
c•,.,.••OG[
I
TO
OCT
---
Uiifrll)l
Fig. 12 l
INSTALLATIO~
Install the panel in the space provided on
the
ba~ic amplifier. Connect the high side of the
lead directly to the yellow-dot terminal on
input
the panel resistor strip. Connect the other input
lead to ground as represented by the black-dot on
the resistor strip and connect the black-dot terminal to point "g" on the basic amplifier. Connect
the filament leads to points "e" and "f" on the
basic at11plifier. Connect the red-dot terminal to
point
"b" on the basic amplifier. Mount the 250K
volume control, Rll, in the proper place on the
basic amplifier chassis and connect.the two outside terminals to points "a" and "g" on the basic
amplifier, as shown in Fig. 13. Connect the 100K
resistor RI2 from the green-dot terminal on the
panel resistor strip to the movable arm of the
volume control (Fig. 13).
0~1,1,t
"
...
•OO•
...
•
TO
w
·-·
.. o
00T
kAO' t7"5YDC
,v
TO e
}cn•c
•
..
TO 9
TOO
OUT•
""'
TO 9
TO b
BLACK
DOT
1TO g
I e f
'
ELECTROLYTIC
C5A.C 58
VOLTAGE AND RES I STANCE OF
TUBE PIN
6SL7
H INPUT PANEL
1
2
3 1. 5V
4 0
5
6 1. 5V
7
8
I Fig. 131
VTVM
0
105V
105V
3. 15 vac
3. 15
vac
0
TO g
RESISTANCE
7K
420K
4K
700K
420K
4K
O.OSA
0.09Q
7
INPUT PANEL TYPE J
fOo
••
.....
.,
•••
.,
-·
I Fig. 141
INSTALLATION
Mount the panel in the space provided at the
left hand side of the amplifier chassis when
ing the front of the amplifier as shown in Fig, 1.
Connect
Point 1 on the J panel to "g" and point 2
INPUT PANEL TYPE Q
fac-
TO. INPUT--+--~
CON-ECTOR
to "a" on the basic amplifier.
Mount volume control,
128X amplifier in the space provided,
0
TO g
2
TO a
0
j Fig. 1s j
R-2 on the front of the
Tl
--
Ill
....
:t----roa
.Ill
29"
--
I Fig. 161
INSTALLATION
Mount the panel in the appropriate blank
space indicated in Figure 1. Select 2 terminals
not in use on the basic
(1 & 2 used here .. for demonstration). Connect 1 & 5
of panel to 1 & 2 of basic amplifier terminal
strip. Match input impedance using table
Connect output lead from arm of volume control to
"an (grid) on the basic amplifier. connect
point
other output lead (6 on panel> to point
basic amplifier.
amplifier terminal strip.
below.
"g" on
-----11) 1112
.-----OF -,r ,.__ STIIII'
0
0
I Fig. 17 I
INPUT INPUT
IMPEDANCE CONNECTla.S
600 ohms Slate(l) &Red(5)
250 ohms Slate(l) &Purple(4)
150 ohms Slate
30 ohms Purple(4)
(1 > & Red (5)
& Red(5)
0
0
Yellow(2) & Brown(3)
Yellow(2)
Slate(l> &Brown(3)
Yellow(2> & Red(5)
112
STRAPPING
&Brown(3)
8
INPUT PANEL TYPER
a.oo,,oo
<>----..... ., ......... .., .... .,1tf•.,-~---'---,
T .. U "~D
I I '
t, I ;
, t , ,n
'-~4".. uo
-;
'
: YklRW
I
:-
'
'
••
I
'
HO
I
I
«>--------·----~--..:--,--'
INSTALLATION
left hand side of the amplifier chassis when facing the front of the amplifier
Connect a properly matched "T" pad to the input
transformer as shown in table. Connect the leads
from the input
Connect the output lead from point 7 on Fig,
point
on Fig.
amplifier.
I
Fig, 181
Mount the panel in the space provided at the
as shown in Fig. 1.
device to the input of the "T" pad,
18 to
"g" and the other output lead from point 9
18 to point "a" (grid) on the basic
0
0
INPUT
IMPEDANCE
600
ohms
250 ohms
150 ohms
30 ohms
T1
408-A
4
1
5
6
2
3
1-a
9
TO a
I Fig.
INPUT
CONNECTIONS
Slate(l> &Red(5>
Slate(l).& Purple(4,
Slate(l) &Red(5)
Purple(4) &Red(5)
TRANSF.
0
0
TO g
19 I
STRAPPING
Yellow(2) & Brown(3 >
Yellow(2) & Brown (3)
Slate(!> &Brown(3)
Yellow(2) &Red (5)
9
ELECTRICAL PARTS LISTS
PARTS LIST FOR 128X BASIC AMPLIFIER
REF
SYMBOL
Cl
C2
C3A
C3B
C4
C5A
C5B
C6
C7
cs
C9
RIA
RIB
R2
R3
R4
R5
R6
R7
RS
R9
RIO
Rll
R12
RI3
Tl
T2
Fl
Swl
Vl
V2
V3
V4
V5
Xl
X2
X3
X4
X5
10
DESCRIPTION
Cap, 16 mfd elec, 600dcwv
Cap, 50 mfd, el ec, 450dcwv
Cap, elec, 2 sect 40 mfd
450dcwv,
40 m
fd, 450dcwv
Cap,
50 mfd elec, 450dcwv
Cap, elec, 3-sect 80-SOmfd
50dcwv
80111 fd
50dc1'V
Cap,
oil paper O. 2511fd
600dcwv
Cap, oil paper lrafd 600dcwv
Cap,
oil paper lmfd 600dewv
Cap, mica lOOmmf ±10%
600dcwv
Res. ww. 2000 ohms ±10%
75 watt
Res.
ww. 13,000 ohms
± 10% 75 watt
Res. carbon, 47,000 ohms
±
5% 1 watt
Res. carbon, 1600 ohms
± 5% 1 watt
Res. 260 ohms
±10% 17. 5 w
Res. carbon, 100,000 ohms
±
5% 1 watt
Res. carbon, 10,000 ohms
± 5% 2 watt
Res. carbon, 20,000 ohms
± 5% 1 watt
Res.
r.arbon, 270,000 ohms
±
5% 1 watt
Res. carbon, 1
M ohms
±
5% 1 watt
Res. carbon, 1000 ohms
±
5% 1 watt
Res.
ww. 150 ohms± 10% 25w
Transformer, Power
Transformer,
Output
Fuseholder
Switch, toggle, bat handled
Tube type 6SJ7
Tube type 6V6GT
Tube type 6L6GA
Tube type 6L6GA
Tube type 5U4G
Socket, octal, bakeli
te-raica
filled
Socket, octal, bakel i
te-
mica filled
Socket, octal,
bakelite-
mica filled
Socket, octal,
bakeli te-
mica filled
Socket, octal, bakeli te-
mica filled
MANUFACTURER
Aerovox
Aerovox
Sprague
Sprague
Aerovox
Sprague
Tobe
Tobe
Tobe
El.111enco
Ward Leonard
Ward Leonard
Al 1 en Brad! ey
Allen Bradley
IRC
All en Bradley
Allen Bradley
Al 1 en Bradley
All en Bradley
Allen Bradley
Allen Bradley
Ohmite
Langevin
Langevin
BusSlllan
Arrow-Hart &
Hegeman
GL 600
AFH 1-53
DFP
AFH 1-53
DFP
OM-625
OM-601
OM-601
EM-45
GB-4735
GB-1625
MW5
GB-1045
HB-1036
GB-2035
GB-2745
GB-1055
GB-1025
0200G
1or-E
317-A
HKP
PARTS LIST FOR INPUT PANEL TYPE A
REF
SYMBOL
DESCRIPTION
Rl- lA
Res.
carbon,
12,00~
±5%
1/2 watt
R2-1A
Res,
carbon,
30~
±5% t/2
watt
R3-1A
Res, carbon,
300,
00~
±5%
1/2 watt
R4-1A
Res,
carbon,
51,00~
±5%
1/2 watt
R5-1A
Res, variable,
250KQ
Tl- IA
Transf,
input
PARTS LIST FOR
INPUT
PANEL TYPE B
REF
SYMBOL
DESCRIPTION
ClA-lB
Cap,
elect,
3-sect
10µ.f 350dcwv
ClB-18
10µ.f 350dcwv
ClC-18
20,u.f 250dcwv
C2-1B
Cap, paper
O.
25uf 600dcwv
C3-1B
Cap,
paper
0. 051.L! 600dcwv
C4-1B
Cap, paper
0.05.u.f 600dcwv
Rl-18
Res, carbon, 470,0000
± 10%
1/2 watt
R2-1B
Res,
carbon,
5100
±5%
1/2 watt
R3-1B
Res,
carbon,
33,000Q
±10%
1/2 watt
R4-1B
Res, carbon,
150,
OOOQ
±10%
1/2watt
R5-1B
Res,
carbon,
270,000Q
±10%
1/2 watt
R6-1B
Res, carbon, 47, OOO!J
±10% 1/2 watt
R7-1B
Res, variable 40001J linear,
open in ccw position
R8-1B
Res,
carbon,
22,000IJ
±
10% 1 watt
R9-1B
Res,
carbon,
240,000Q
±5%
1 watt
Tl-1B Transformer,
input
Vl-18
Tube type 1612 or 6L7
Xl-18
Socket, octal bakeli te
MANUFACTURER
Al 1 en-Bradley
Al 1 en-Bradley
All en- B radl ey
All en Bradley
EB
EB
EB
EB
Al 1 en Bradley Type J VC-11
Langevin 400-D
MANUFACTURER
Sprague
DFP
Goodall
M503
Goodall
M503
Goodall
M503
Allen
Bradley
EB
Allen
Bradley
EB
Allen
Bradley
EB
Allen Bradley
EB
Allen Brajil ey
EB
Allen Bradley
EB
Allen
Bradley
VC-3
Allen
Bradley
GB
All en Bradl ey GB
Langevin
402-B
11
PARTS LIST FOR INPUT PANEL TYPE E
REF
SYMBOL
CIA- IE
ClB- lE
ClC- lE
C2-1E
C3-1E
Rl-lE
R2-1E
R3-
lli:
R4-1E
R5- IE
R6-1E
lt7- lE
R8-1E
R9-1E
Jl- lE
Vl- lE
Xl- lE
DESCRIPTION
Cap, elect, 3- sect
lOuf 350dcwv
10.u.f 350dcwv
20.u.f 25dcwv
Cap,
paper
0.05uf 600dcwv
Res, carbon
1M0
±10% 1 watt
Res, carbon,
510Q
±5% 1/ 2 watt
Res, carbon,
33,000Q
±10% 1/2 watt
Res,
carbon, 150, OOQQ
± 10% I/ 2 watt
Res, carbon,
270,0000
±10% 1/2 watt
Res, carbon, 47,0000
±10%
1/ 2 watt
Res, variable,
400QQ linear,
op en in ccw position.
Res, carbon,
22,00Qi,
±10% 1 watt
Res, carbon,
240,000Q
±5%
1 watt
C~nnector, input
Tube type
1612 or 6L7
Socket, octal bakeli te
PARTS LIST FOR INPUT PANEL TYPE H
REF
SYMBOL
C2-1H
C3&C6-1H
C4-1H
C5-1H
CIA-
1H
CIB-lH
Rl-IH
R2-1H
R3-1H
R4-1H
R5-1H
R6-1H
R7-1H
R8-1H
R9-1H
RlO-lH
Rl
1- lH
R12-1H
Vl-lH
Xl-lH
12
DESCRIPTION
Cap, elect,
25µ.f 25dcwv
Cap, paper
O. 0 5µ. f 600dcwv
Cap, paper
0. 03µ.f 400dcwv
Cap, elect
251tf 25dcwv
Cap, elect, 2-sect
201.Lf 450dcwv
Res, carbon, 470K
±10% 1/2 watt
Res, carbon,
3,9000
±10%
1/2 watt
Res, carbon,
I00,00Q0
±10% 1/2 watt
Res, carbon, 270,00()Q
±10%
1/2 watt
Res, carbon,
220,0000
±10% 1/2 watt
Res, carbon, 470,0000
±10%
1/2 watt,
Res, carlion, 10,0000
±10% 1/2 watt
Res, carbon, 3,9000
±10% 1/2 watt
Res, carbon,
270,000Q
±10%
1/2 watt
Res, carbon,
100,000Q
±10%
1/2 watt
Res, var,
250,0000
Res,
carbon, 100,0000
±10%
1/2 watt
Tube type
6SL7
Socket, octal
Bakelite
MANUFACTURER
Sprague DFP
Goodall M503
Allen
Bradley
68-1050
Allen Bradley
EB
Allen Bradt ey
EB
Allen
Bradley
EB
Allen Bradley
EB
Allen
Bradley
EB
Allen
Bradley
VC-3
Allen
Bradley
GB-
Allen Bradley
GB
Amphenol
75-CL-PClM
MANUFACTURER
Sprague
TA-25
Goodall
M-503
Goodall
M-503
Sprague
TA-25
Sprague
DFP
Allen Bradley
EB
Allen Bradley EB
Allen Bradley EB
Allen
Bradley EB
Allen
Bradley
EB
Allen Bradley EB
Allen Bradley
EB
Allen Bradley EB
Allen
Bradley
EB
Allen Bradley
FB
All en Bradley
Type
J
VC-11
Allen Bradley
EB
PARTS LIST FOR INPUT PANEL TYPE J
RE!=
SYMBOL
Rl- lJ
R2-1J
R3-1J
Jl-lJ
OESCRI PTION
Res, variable, lMQ
Res, variable, lMQ
Res, carbon, 300,000Q
±5%
1/2 watt
Connector,. input
PARTS LIST FOR INPUT PANEL TYPE Q
REF
SYMBOL
Rl-lQ
R2-1Q
Tl-lQ
PARTS LIST FOR
REF
SYMBOL
Rl-IM
R2-1M
R3-1M
R4-1M
Tl-lM
DESCRIPTION
Res, carbon 180,000 ohms
±10% 1/2 watt
Res, variable 100,000 ohms
2 watts, audio taper
Input transformer
INPUT PANEL TYPER
DESCRIPTION
Res.
carbon,
620"1
±5%
1/2 watt
Res, carboJJ,
±5%
1/2 watt
100,000"1
Res, carbon,
75,000Q
±5%
1/2 watt
Transformer.
input
MANUFACTURER
Allen Bradley Type
Allen Bradley Type
Allen Bradley
Amphenol
MANUFACTURER
All en Bradley
Allen Bradley
Langevin
MANUFACTURER
Allen Bradley
All en Bradley
Allen Bradley
Langevin
DWG. NO. P - 128X - A - 15 REV.
JA-1052-1>3048
JA-1052-P3048
EB
75-CL-PClM
EB
JA-1041-P3048
408-A
EB
EB
EB
408-A
13
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