Hallicrafters S-40 B User manual

installation
and
operating
instructions
for model S-40 B
radio receiver
94X586
750
the hallicrafters co.
MANUFACTURERS OF RADIO AND ELECTRONIC EQUIPMENT, CHICAGO 21, U.S. A.

Figure 1. Radio Receiver Model S- 40B. BU. front view.

A A
G33
Si
BAND SWITCH I- I IS SHOWN IN
POSITION FOR BAND 4.
NOTE
RESISTANCE VALUES ARE IN » 4,10CA CAPACITOR
RELUES ARE IN NYE, PAPER CAPACITOR VALUES
ARE IN DECIMAL EQUIVALENTS OF MFQ4 ELECTROLYTIC
CAPACITOR VALUES ARE IN MF
/ DENOTES MECHANICAL ° MOM
e
G62
t.t
SO2
STANDBY SOCKET
2
VALUES tl TOLERENCES SHOWN ARE NOMINAL
is VARIATIONS MAY BE FOUND. IT IS RECOMMENDED
THAT THE VALUE OF ANY REPLACEMENT CORRESPOND
TO THE NOMINAL VALUE OF THE PART BEING REPLACED.
V2
6SA7
pi4-0 "0
U -7-0
!Xi r 014-
X V3
6SK7
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100,000
R OB
SWITCH 545 SHOWN
IN POSITION I.
PL
105 - 125 60 AC
1. 2,000
V4
6SK7
/t27
•7,000
Vs VG
V2 6SC7 61(6— CT
44
I 270
R 121
>MST
1000 ,/ R
TO HEATERS
•
1LT
V5
V2 6SC7
LAST R SYMBOL R-67
LAST G SYMBOL C-64
.01
IS
1100 349 - A
4
TONE SWITCH ON)
I-4 C OP/
t—HICH
4— LOW
REPRESENTS TRANSFORMERS T-1 TO T-10

A A
SI
II
IA
BAND SWITCH 3-1 IS SHOWN IN
POSITION FOR BAND 4.
,0
C33
CS!
.25
NOTE.
RESISTANCE VALUES ARE IN > me micA CAPACITOR
VALUES ARE IN IMF, PAPER CAPACITOR VALUES
ARE IN DECIMAL EQUIVALENTS OF MFD., ELECTROLYTIC
CAPACITOR VALUES ARE IN MF
/ DENOTES MECHANICAL CIANGING
V
6SG7 R4
33
sl E
53
C62
SO?
STANDBY SOCKET
o
VALUES 8 TOLERENCES SHOWN ARF Nom1 , 4ILL
8 VARIATIONS MAY BE FOUND. IT IS RECOMMENDED
THAT THE VALUE OF ANY REPLACEMENT CORRESPOND
TO THE NOMINAL VALUE OF THE PART BEING REPLACED.
riioi4 P4 C ro
I-
V
2 3
6SA7 65K7
Re
10,000
t 0.
,I 1 . 1:7c1
R64
330
m.•
1 28 01
100,300 $
R 58 e
c s4
DI
99 :7C ,, $ 48 SHOWN
IN POSITION I
Th
R 66
47,000
I.
R67
0,000
T 16
PL,
105 - 125 60 AC
•
. 03 I
It,000
4 or
•
j
1.4
65K7
-2 -• C50
, 30 0I
C38
V5 V6
1/2 6 SC7 6K6-GT
C.41
I 170
TO HEATERS
6116
I.
W
1300
•
51
TOUPD
V5
1/2 6SC7
LAST R SYMBOL R-67
LAST C SYMBOL C-64
•70
./$0t 11531 1
01
090349 -A
•
TONE SWITCR ( 910,0
I- A C OPT
t-RIC04
3- MEDIUM
4- LOW
REPRESENTS TRANSFORMERS T4 TO T-10

ERRATA SHEET FOR S- 40B
After printing this manual a circuit improvement was made by
adding Resistor R-68 to the Oscillator Circuit as illustrated
below.
26 , z!,
T7
IMO
"MO
Tg
R30
25
10
24
D
t
017
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9281408
94X697

the hallicrafters co.
SERVICE BULLETIN FOR MODEL S- 40B
GENERAL
Tubes Seven plus rectifier
Speaker 5- inch PM
Speaker V.C. Impedance.
Headset Output
Antenna
Tuning
Tuning Range
3.2 ohms
Low Impedance
Provision for external antenna
Manual
Band Selector Frequency
Position Range
1. 540 kc - 1680 kc
2. 1680 kc - 5.4 mc
3. 5.3 mc - 15.5 mc
4. 15.5 mc - 44 mc
Intermediate Frequency . 455 kc.
Power Supply Standard Model 105-125 V. 60
cycles AC
Universal Model 105-250 V.
25/135 cycles AC
Power Consumption . . . 75 Watts
RESTRINGING DIAL CORD
To restring the general coverage tuning dial cord, cut an
18- inch length of 30 lb. test dial cord and tie one end to the
tension spring of the main tuning capacitor drive pulley at
position " 1" on the diagram. Follow the numbers " 1" through
"4", and at position " 4" stretch the tension spring and tie the
cord securely.
To restring the band spread tuning dial cord cut a 36- inch
length of dial cord and follow the procedure as above, starting
at position " A" on the diagram. Note that the tuning drive
shafts are wrapped with two and a fraction turns of dial cord
for proper traction.
REPLACING LAMPS
Refer to Fig. 7 for the location of the two dial lamps used in
the receiver. To gain access to defective lamps, reach in
through cabinet cover and unclip the dial lamp sockets. The
TWO LOOPS THRU
H FLANGE HOLES At E.
NOTE PULLEY POSIT IONS
SHOWN FOR MAR.
GANG CAPACITY.
Fié 1. Dial cable strtnétné procedure
SENSITIVITY
CONTROL
.7 /
1050
FORM 91 IX587
RUN NO. I
SEE CHASS IS
STAMP
SI ANDSY
RECEIVE
SWITCH
SAND TUNING VOLUME A.V.C. CW/AM NOISE BANDSPREPD TONE PITCH
SELECTOR CONTROL CONTROL SWITCH SWITCH LIMITER TUNING CONTROL CONTROL
SWITCH
92%1840
sockets may then be brought out into the open to change the
defective lamp. Replace lamps with 6-8 V. Mazda # 44 ( Blue
bead) lamps or equivalent.
ALIGNMENT PROCEDURE
For I- F amplifier alignment it will be necessary to remove
the receiver chassis from the cabinet. The chassis is held in
the cabinet by three screws along both the bottom edge of the
front panel and the rear of the cabinet, and two screws on
either side of the front panel.
NOTE - R- F alignment should be accomplished through the
holes provided in the cabinet bottom as the oscillator calibra-
tion will be effected slightly by changes in the capacity between
the cabinet bottom and the r- f coils and wiring.
Before starting the alignment procedure, check the position
of the general coverage dial index marker on the low frequency
end of the range and the bandspread dial on zero position. The
general coverage condenser should index at max. capacity, and
the bandspread condenser at min. capacity.
The standard RMA dummy antenna mentioned in the align-
ment chart consists of a 200 mmf. condenser in series with a
20 oh r- f choke which is shunted by a 400 minf con,denser in
series with a 400 ohm carbon resistor.
Set the following controls before alignment.
SENSITIVITY Set at Maximum
VOLUME Set at maximum
AVC switch Set at OFF
BAND SPREAD Set at zero
CW/AM Set at AM ( See Step 2)
NOISE LIMITER Set at OFF
STANDBY RECEIVE Set at RECEIVE
TONE SWITCH Set at HIGH
For the settings lthe remaining controls, see alignment chart.

ALIGNMENT CHART
Signal Signal Band Receiver
Dummy Generator Generator Switch Dial
Step Antenna Coupling Frequency Setting Setting Adjust
Remarks
1 None Stator plates in center 455 kc
section of tuning gang.
"1"
1000 kc Sl,S2,S3 Maximum audio output at
S4,S5,S6 speaker voice coil. Use just
enough signal generator out-
put to obtain a 50 MW signal
level.
2 None See step 1
455 kc
(No modulation)
"1"
1000 kc S7 With the CW/AM switch set
at CW, remove the pitch
control knob and adjust Si
for zero beat. Replace the
knobwith the dot in the cent-
er position.
3 Std RMA " Al" on antenna strip.
dummy Jumper connected be-
tween " A2" and " G".
4 Std RMA See step 3
dummy
38 mc
1,411
36 mc * A, B, C Maximum output as in step 1
18 mc 18 mc * S8,S9,S10
14 mc " 3" 14 mc * D, E, F Maximum output as in step 1
10 mc 10 mc * S11,S12,S13
5 Std RMA See step 3
dummy
5 mc " 2" 5 mc * G. H, I Maximum output as in step 1
1.8 mc 1.8 mc * S14
6 Std RMA See step 3 1500 kc
dummy
600 kc
1500 kc * J, K, L Maximum output as in step 1
600 kc * M
*Note - Calibration adjustments.
92D1132
Fié. 2. Top view, alignment points