Hallicrafters SX-140 Training manual

OPERATING AND
SERVICE INSTRUCTIONS
COMMUNICATIONS RECEIVER
MODEL SX-140

"The Hallicrafter's Company warrants each new radio product manu-
factured by it to be free. from defective material and workmanship
and agrees to remedy any such defect
or to furnish a new part in ex-
change for any part of any unit of its manufacture which under nor-
mal installation, use and service discloses such defect, provided the
unit is delivered by the owner to our allthorized raclio dealer, whole-
saler, from whom purchased, or, authorized service center, illtact, for
examination, with all transportation charges prepaid within ninety
days from the date of sale to original purchaser and provided that
such examillation discloses in our judgment that it is thus defective.
This warranty does not extend to any
of our radio products which
have been subjected to misuse, neglect, accident, incorrect wiring not
our own, improper installation,
or to use in violation of instmctions
furnished by us, nor extended to units which have been repaired
or
altered outside of Ollr factory or authorized service center, nor to cases
where tile serial number thereof has been removed, defacedorchanged,
nor to accessories used therewith not of our own manufacture.
Any part of a unit al'l"oved for remedy or exchange hereunder will
be remedied
or exchanged by tile allthorized radio dealer or whole-
saler without charge to the owner.
This warranty
is in lieu of all other warranties expressed or implied
and no representative or I,erson is allthorized to aSSlime for liS allY
other liability in connection with the sale of our radio products:'

092- 010393
Figure 1. Hal/icrafters Model SX-140
SECTION I
GENERAL INFORMATION
The new Hallicrafters Mo del SX-140 is a
pr ec isi on built, hi g hl y sensitive, co mmuni ca ti o ns
r ec eiver pr o vidin g co ver ag e within the fr equen cy
r ang e of 3.5 me gacyc les to 54 me gacyc le s. For
ea se and fle x ibili ty of o perati on, a s in g le tunin g
co ntr ol is pr o vid ed which cov ers the eas y -to-
re ad slide-rule dial spe c ifi c all y ca libr a ted for the
80, 40 , 20, 15, 10 an d 6 me ter ba nds. Fi ve tube s
p
lu s two sili co n re c tifi e rs are empl oy ed in the
la test superheter odyne Circ uit and pr ov isi on is
made for the re c epti on of a mplitu de mo dul a ti on
(A M) , sin gle -sideband (S SB), and co ntinu ous wa ve
(CW) signa ls ov er the e ntire tunin g r an ge .
For
co ntr ol of sel ec ti v it y, a r ege ner a ti ve
int e rm e di a te-fre qu ency st ag e is e mpl oye d. This
co ntr ol of re g ener a ti on al so pr ovid es a boo st in
se nsiti v it y to brin g in w eak or d ist a nt st a ti o ns
that wo ul d o rdin a ril y be lo st in th e b ac kgr o und
nois e.
A c arri er le vel meter pr o vides an a id for
a
cc ur a te tunin g a nd a me a ns of determinin g the
r ela tive strength of re c ei v ed si gna ls.
The a li g nm e nt pr oc edure for th e r ec eiver
h as b ee n g reatl y simplifi ed with the use of a
b
uilt-in cr y st al osc ill ator c ir c uit to g en er ate th e
req uir ed signals for a li g nm e nt. A 1650-KC cr y s-
ta l (n ot supplied) , plu gge d int o th e cr ys tal ca libr a-
tor s
oc ket , will pe rmit th e IF tr a nsf o rm er s to be
a li g ned with th e us e of th e C ar ri er Level meter
as an o utput indi ca to r.
Othe r sp ec ial feat ur es inc lu de : auxi li ar y
• 1 •
switching, contr o llin g an a ntenna changeo ver re-
lay, turnin g on the transmitter, or sh o rtin g th e
speaker voice co il durin g tr a nsmittin g (with th e
FUNCTION co ntr ol set to STANDBY). The SELEC-
TI V ITY -BFO co ntr ol, with its as soc iated c ir c uitr y,
permits co ntinu o usl y v ari a ble sele c ti v it y on AM
re c epti on to th e po int wher e the BFO starts.
Be yon d this po int, the c ir c uitr y permits r ec epti on
of CW
and upper or lo wer SSB si g nals . The pitch
of a CW si g nal m ay be vari ed with this co ntr o l.
The cr y stal osc illat or ci r c uit utiliz es . a 3.5-MC
cr y st al whi ch p ermits th e o per ato r to se t the low
frequen cy end s of the 80, 40, 20, 15 and 10 meter
ban ds and 52.5 MC on the 6 meter ba nd.
NOTE
Careful a ttenti on sh o uld be dire c ted to
the INSTALLATION and OPERATION
instru c ti o ns. The y ha ve been pr ov ided
to insure satisf a ctory o per ati on fr om
this Ha lli c rafters pre ciSion built pr o-
du ct. The re ce iv er has an unusuall y
hi gh d eg ree of sensitivit y necessar y to
r
ece ive weak and distant st a tions.
Carele ss o per a ti on of ahi gh sensitivit y
r
ec ei ve r m ay r es ult in ex c essi ve no ise
or b ac kgr ound hiss. These undesir-
a ble eff ec ts ca n be held to a minimum
by care ful a djustment of the SELEC-
TIVITY , TUNING, AUDIO GAIN andRF
GAIN co ntr o ls as well as the proper
sel ec ti on and a rr ang ement of the an-
te nna.

SECTION II
TECHNICAL DATA
TECHNICAL SPECIFICATIONS
TUBES ......... 0 • , 0 ••••• 0 •••••• 0 0 0 Five, plus two Silicon Rectifiers
HEADPHONE OUTPUT . . . . . . . . . . . . . . . .. Low to medium impedance (see para. 3-6)
ANTENNA INPUT. . . . . . . . . . . . . . . . . . • .. Single wire or any 50-75 ohms, unbalanced
POWER CONSUMPTION .. . . • . . . . . . . . . •. 47 watts
AUDIO OUTPUT IMPEDANCE ............ 3.2 ohms
DIMENSIONS. . . . . . . . . . . . . . . . . . • . . . .. 13-3/8" wide, 8-1/4" deep, 7-3/16" high
NET WEIGHT ..•.................... 13.5 pounds
SHIPPING WEIGHT. . . . . . . . . . . . . . . . . . .. 14 pounds
RECEIVER FREQUENCY COVERAGE
BAND IN FREQUENCY INTERMEDIATE OSCILLATOR
METERS RANGE FREQUENCY FREQUENCY
RANGE
80
3.5-4.0 MC 1650 KC 5150-5650 KC
40 7;0-7.3 MC
1650 KC 8650-8950 KC
20 14.0-14.4 MC 1650 KC
15650-16050 KC
15
21.0-21.5 MC 1650 KC 11325-11575 KC
10 28.0-29.9 MC 1650 KC 14825-15775 KC
6
50.0-54.0 MC 1650 KC 24175-26175 KC
FCC BAND
LIMITS
3.5-4.0 MC
7.0-7.3 MC
14.0-14.35 MC
21.0-21.45 MC
28.0-29.7 MC
50.0-54.0 MC
On some bands the frequency range of the receiver has been extended above the actual FCC
band limits to include the reception of some of the special service frequencies.
The oscillator frequency on the 80, 40, and 20 meter bands is higher than the received sig-
nal by the IF frequency. On the 15 and 10 meter bands, the oscillator second harmonic is used
which is higher than the received signal by the IF frequency. On the 6 meter band,the oscillator
second harmonic is used which is lower than the received Signal by the IF frequency •
• 2·

SECTION III
INSTALLATION
3-1. UNPACKING
Mter unpacking the receiver, examine it
closely for damage which may have occurred in
transit. Should any sign of damage be apparent,
file a claim immediately with the carrier stating
the extent of damage. Carefully check all shipping
labels and tags for instructions before removing
or destroying them.
3-2. LOCATION
The receiver is equipped with rubber mount-
ing feet for table or shelf mounting. When locating
the receiver, avoid excessively warm locations
such as those near radiators and heating vents.
Allow at least one inch of clearance between the
back of the receiver and the wall for proper venti-
lation.
3-3. POWER SOURCE
The SX-140 Receiver is designed to operate
from a 105-125 volt, 60 cycle AC power source.
Power consumption is 47 watts.
NOTE
If in doubt about your power source,
contact your local power company prior
to inserting the power cord into an AC
power outlet. Connecting the receiver
to the wrong power source may cause
figure 2. Single Wire Antenna.
. J.
extensive damage to the unit and costly
repairs.
3-4. ANTENNAS
The RF input of the receiver is designed
for operation from either a single-wire antenna
(fig. 2), a half-wave doublet or other tuned antenna
with transmission line impedances from 50 to 75
ohms (fig.3 and 4.). Antenna connections are made
to a two-terminal strip at the rear of the receiver
marked A (antenna) and G (chassis ground).
The
single wire antenna (fig. 2) may be used
in an area where antenna space is limited. When
using this antenna, a ground lead from terminal
G to a water pipe or other earth ground will im-
prove reception.
For the best performance, however, a co-
axial-fed dipole, tuned to the center of the desired
band, is the recommended type of antenna to be
used (fig. 3). The impedance of this antenna is
approximately 75 ohms. When using this antenna,
the center conductor of the coax is connected to
terminal A and the outer conductor (braid shield)
is connected to terminal G.
For further information regarding antennas,
refer to the "A.R.R.L .. Antenna Book", pub-
lished by the American Radio Relay League, West
Hartford, Conn., U.S.A.
I 468.,j
4 LIFEET), FREOUENCYIMC) I
092-0092098
figure 3. Dipole Antenna Using Coaxial Lead-in.

468 1
r UFEETl· FREQUENCY IMC j
~ 50-750HM ~¥ 0 o~
TWIN LEAD
!NSULATOR [§fBi]
09Z-0092!OC
Figure 4. Dipole Antenna Using Twin Lead-in.
3-5. SPEAKER CONNECTION
The speaker terminal board is marked
SPKR and GND. Internally, the hot lead from the
output transformer is connected through the
PHONES jack (J1) to the SPKR terminal; the other
transformer lead is connected to chassis ground.
3-6. HEADPHONES
The headphone jack, marked PHONES, is
located on the front panel of the receiver (as seen
in figure 5) and is wired to automatically disable
the speaker when the headphones are plugged in.
The headphone output impedance is not critical,
and any commercial headphones may be used, in-
cluding crystal types, as no direct current flows
in
the headphone circuit. For maximum headphone
output, the
use of low-impedance magnetic phones
(50 to 1000 ohm) is recommended.
3-7. TYPICAL SYSTEM CONNECTION
A four terminal strip is provided at the
rear of the chassis to connect the Receiver into
a station control system (see figs. 6 and 7). With
the FUNCTION switch in the STANDBY position,
terminals 1 and 2 are shorted together as are
terminals 3 and 4, thus providing auxiliary switch-
ing functions. Figure 6 illustrates the receiver
controlling the antenna changeover relay and the
station transmitter (such as the HT-40). Figure
7 illustrates the Receiver controlling the station
speaker and available contacts for another auxi-
liary switching function.
SECTION IV
FUNCTION OF OPERATING CONTROLS
4-1. GENERAL
Each control of the receiver performs a
definite function which contributes to its reception
capabilities. Full appreciation of the receiver is
to be expected only after becoming familiar with
each of the controls and the effect each control
has on the performance of the receiver.
A brief description of each control is con-
tained in the following paragraphs (see figure 5).
4-2. FUNCTION CONTROL
The FUNCTION control, a four-position ro-
tary switch, is used to select the desired operating
condition of the receiver. Auxiliary switching
functions are also controlled by this switch, refer
to paragraph 3-7. Operating conditions for each
switch position are as follows:
1. In the OFF position, no power is applied.
2. In the STANDBY position,power is ap-
plied to the receiver; however, a high
negative bias is applied to the RF tube
(VIA) grid to prevent the reception of
signals.
.4 •
3. In the AMposition, amplitude modulated
signals may be received and the AVC
circuit is activated.
4. In the CW -SSB position, continuous
wave and single-sideband signals may
be received. The AVC is reduced for
CW and SSB reception. The carrier
level meter is disabled to prevent
damage by a strong signal.
4-3. BAND SELECTOR CONTROL
The BAND SELECTOR control is a six-posi-
tion rotary switch, permitting the receiver
to receive Signals on either the 80,40,20, 15, 10,
or 6 meter band.
4-4. CAL-OFF CONTROL
The CAL-OFF control is a DPDT slide
switch. In the CAL position, the 3.5-MC crystal
marker circuit is actuated and provides beat sig-
nals at 3.5, 7.0, 14.0, 21.0, 28.0, and 52.5 MC.
With
the switch in the OFF pOSition, the crystal
marker circuit is disabled and no beat notes
will be heard.

PO NT
T r- I ER ALIGNMEN MARK
\\
CARRIER LEVEL
MAIN TUNING
FREQUENCY IN MEGACYCLES 80 M FREQUENCY IN MEGACYCLES
::n
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...
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...
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3;5 3,,6
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3;8
3.9 4.0
40 M
(Q),I
II SIINITS DB OYER sa
7.0
7
il
7.2 7.3
10 M
14
iO
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I
1~3
14.4
ANT TRIM
CAL RESET
15 M
• •
2~0
2~.1
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21.3
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2~5
0 0
10 M
• • •
21
0
2~5
29
2~.5
29.9
RECEIVER
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51.0
65 P
53.0
5~0
the hallicrafters CD.
MODEL 5X-140
'"tI
Q FUNCTION
PHONES
BAND SELECTOR
CAL R.F. GAIN ANL SELECTIVITY
AUDIO GAIN
::J
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20
15
B. F. O.
, .. -55"0
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0 0 ® 0
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STAND BY
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OFF OFF
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092-0095598

S)(-140 RECEIVER
CONTACTS OF
FUNCTION SWITCH
~AM.CW-SSB
1-', --"';> STANDBY
,--,--.-...
I ~~ ~O ~~~H~ ~~ ~~ 0 0e ~G~ 0
!
EXTERNAL
POWER SOURCE
'\[7
I-IT- 40 TRANSMITTER
SWITCH CONT.e.CTS SHOWN IN NORMAL
OR RECEIVING POSITION
Figure 6.
Station Control, Receiver Controlling Antenna Relay and Transmitter.
sx - 140 RECEIVER
CONTACTS OF
FUNCTION SWITCH
AN, CW-SSB
AUXILIARY
SWITCH'''G
CONTACTS
SWITCH CONTACTS SHOWN
IN NORMAL
OR RECEIVING POSITION
HT - 40 TRANSMITTER
CONTACTS OF
FUNCTION SWITCH
~
STANDBY
ElCTERNAl.
Pa..'ER SOURCE
Figure 7.
Station Control, Transmitter Controlling Antenna Relay.
- 6 -
092-0096298

4-5. ANL-OFF CONTROL
The ANL-OFF control is a SPDT slide
switch. When the ANL-OFF switch is in the ANL
position, the noise reducing circuit is actuated to
improve reception of signals in the presence of
high
noise level, such as, ignition noise, atmos-
pheric static, etc. When placed in the OFF posi-
tion, the receiver resumes its normal reception
of signals.
4-6. RF GAIN CONTROL
The RF GAIN control is a variable resistor
in series with the cathode of the RF tube VlA. In
the
extreme counterclockwise position, maximum
resistance is introduced into the cathode circuit
thus developing maximum cathode bias to cut off
the
plate current. In the clockwise position, mini-
mum cathode bias is developed, plate current in-
creases,and RF gain is maximum.
4-7. AUDIO GAIN CONTROL
The AUDIO GAIN control, a variable resis-
tor, regulates the receiver volume. Clockwise
rotation increases the volume; counterclockwise
rotation decreases the volume.
4-8. SELECTIVITY-BFO CONTROL
The SELECTIVITY -BFO controls the ef-
fective resistance connected between the IF tube
(V3) suppressor and chassis ground. This control
varies the regeneration capabilities ofthe IF stage
up to and beyond the point of oscillation. During
the reception of AM signals, the selectivity ofthe
IF stage can be varied from approximately 8 KC
(control fully counterclockwise) to approximately
2 KC (control advanced to the point just below the
point of oscillation). For the reception of CW and
SSB signals, advance the control to the point of
oscillation or beyond. By varying the control
beyond the point of oscillation, the pitch of a CW
signal may be varied as desired.
4-9. MAIN TUNING CONTROL
The MAIN TUNING control is a variable
capacitor which determines the oscillator fre-
quency. It engages and moves the pointer on the
slide-rule dial when tuning in stations.
4-10. CAL RESET CONTROL
The CAL RESET control is a variable
capacitor connected in parallel with the MAIN
TUNING capacitor to permit recalibration of the
dial pointer on each band. This may be considered
as an electrical pointer reset. It is used primarily
in connection with the CAL-OFF switch when
setting the low frequency limits of each band and
the 52.5
MC point on the 6 meter band.
. 7.
4-11. ANT TRIM CONTROL
The ANT TRIM control is a variable capa-
citor which is connected across the secondary
of the antenna coils as each coil is switched into
the
circuit. It maintains perfect tracking of signals
on all frequencies of each band.
4-12. USE OF THE CARRIER LEVEL METER
The carrier level meter is useful onlywhen
the FUNCTION switch is set in the AM position
and permits the operator to obtain a relative
signal strength indication of the AM signals
received. When the FUNCTION switch is set to
the CW-SSB
position, the carrier level meter is
disabled to prevent the pointer from being abused.
In the AM position, the carrier level meter
is very sensitive and will permit an excellent
visual display of the relative strength of the in-
coming signals.
4-13. SERVICE OR OPERATIONS QUESTIONS
For any further information regarding
operation or servicing of the receiver, contact
The Hallicrafters dealer from which the receiver
was purchased. The Hallicrafters Company
maintains an extensive system of authorized
service centers where any required service will
be performed promptly and efficiently at a nominal
charge. All Hallicrafters Authorized Service
Centers display the sign shown below. For the
location of the one nearest you, consult the tele-
phone directory.
commu nlcotlonl
equipment
Do not make any service shipments to the
factory unless instructed to do so by letter. The
Hallicrafters Company will not accept the respon-
sibility for any unauthorized shipments.
The Hallicrafters Company reserves the
privilege of making revisions in current produc-
tion of equipment and assumes no obligation to
incorporate these revisions in earlier models .

SECTION V
RECEIVER OPERATION
5-1. STANDBY
Rot ate the FUNCTION contro l to the STAND-
BY po
sition . In this p os ition ,po wer is app li ed to
the re ce iver, as indi ca ted by illumination of the
t uning dial, thus allowing the r eceiver towarm up
prior to ca libr ation or normal ope ration (reception
of AM, CW or SSB si gna ls).
5-2. CALIBRATION
A specia l crystal oscillator circ uit (with
cr ysta l) has been inc or po r ated int o the re ce iver
to enab le the o perat or to accurately ca libr ate eac h
ba nd. A 3.5-MC cr y stal ins erted int o the crystal
socket (see fig. 8) pr ov id es a signa l that will zero-
beat wit h the l oca l osc illator to pr ov id e a ca li bra -
tion marker at the low frequen cy edge of the 80,
40, 20, 15 a nd 10 meter bands and at 52.5 MC on
t he 6 meter band . For ca libr ation of the re c ei ve r
pr eset the co ntr o ls as in di ca ted:
TI
CI
ANTENNA---
TRIM
C41
CAL
RESET
V2
6U8A
C42
ANT TRIM . . . . ... . .. C en ter of ran ge
FUNCTION ... .... ... CW -SSB
CAL-OFF . ... ....... CAL
ANL-OFF ..... ..... OFF
RF GAIN ... ... .. ... Maximum co unt er -
cl
oc kwise
AUDIO GAIN .... . . .. Maximum clockwise
BAND SE LECTOR . .... 80
MAIN TUNING ....... 3.5 MC
SELECTIVITY -BFO .... Maxim um cl oc kwise
The band edge ca libr atio n po ints for the 80,
40, 20 , 15 and 10 meter bands are 3.5, 7.0 , 14.0 ,
21.0, a nd 28.0 MC resp ective ly. These Signals ar e
V5
6AW8A
V4
~+----6T8
T3
MI LMI MAIN TUNING
V3
T2 6BA6
LM2
092-01 1 237
Figure 8. Top View Alignments .
· 8 ·

available from the fundamental and even har-
monics of the 3.5-MC crystal oscillator. Since no
even harmonic of 3.5 MC will fall in the 6 meter
band, an odd harmonic, 52.5 MC is used.
Beginning with the 80 meter band at 3.5 MC,
rotate the CAL RESET control until a beat note
is heard. It may be necessary to advance the RF
GAIN control clockwise until the beat note is
audible. Adjust the CAL RESET control to obtain
a zero-beat which completes the calibration of the
80 meter band. As each band is calibrated from
the 80 to the 6 meter band, it will be found that
the harmonics become weaker, thus necessitating
further advance of the RF GAIN control.
If on any band, duringthecalibrationproce-
dure, no beat note is heard with any setting of the
CAL
RESET control, it is assumed that this band
is out of alignment and the alignment procedure
should be followed (see section VI).
NOTE
Since all bands are calibrated with
the CAL RESET control, only the last
band calibrated is in proper calibration.
Each time the receiver is switched to a
different band for reception, the band
calibration should be checked.
5-3. CW RECEPTION
1. For CW reception set the receiver con-
trols as follows:
FUNCTION ......•. CW-SSB
BAND SELECTOR. .. Desired band
CAL-OFF . . . . . . .. OFF
RF GAIN . . . . . . . .. Maximum clock-
wise
ANL-OFF . . . . . . .. OFF
SELECTIVITY -BFO.. Maximum clock-
wise
AUDIO GAIN. . • . . .. Center of range
ANT TRIM. . . . . . •. For maximum
background noise
CAL RESET. . . . . •. Previously set
(para. 5-2)
NOTE
For practice in tuning in a' CW signal,
the 40 meter band is recommended as
there are usually an abundance of CW
stations on the air at all times of the
day or night.
2. Starting at the lower frequency end of
the
band, rotate the MAIN TUNING con-
trol until a CW signal is located. Reduce
or increase the volume if necessary
(see step 3). Continue tuning until the
zero-beat of the signal is reached.
Either side of the zero-beat point may
be used for the reception of CW sig-
nals. Signal pitch may be varied to a
comfortable listening level by tuning
nearer to or further from the zero-
beat.
3. Rotate the AUDIO GAIN control to main-
tain a comfortable listening level
throughout the tuning procedure.
4. Rotate the SELECTIVITY-BFO control
counterclockwise to the point just above
the point where the circuit drops out of
oscillation. At this point, the receiver
will have maximum selectivity for sep-
arating stations operating on frequen-
cies near the frequency of the desired
station. Slight readjustment of the MAIN
TUNING control may be required.
5. Rotate the RF GAIN control counter-
clockwise to reduce background noise
to a minimum while maintaining an ad-
equate listening level.
6. Rock the ANT TRIM control to obtain
maximum signal level.
5-4. SSB RECEPTION
The procedure for tuning in an SSB signal
is identical to the above procedure for tuning a
CW signal, with one important difference. Only one
side of the zero-beat or zero signal point may be
used for the reception of the SSB signal. When the
transmitting station is operating on the lower
sideband it will be necessary to use the high fre-
quency side of the zero signal point; and con-
versely, when the transmitter is transmitting on
the upper sideband the low frequency side of the
zero-signal point must be used.
As a typical example, with controls set the
same as outlined for the reception of a CW signal,
rotate the MAIN TUNING knob until unintelligible
speech is heard. Rotate the knob further, through
zero-beat if necessary, until the speech becomes
intelligible. Some stations will be intelligible on
the high
side of the zero-signal while others will
be intelligible on the low side of the zero-signal
point.
NOTE
It will be found that, on the average, the
SSB stations on40 meter s will be tr ans-
mitting lower sideband signals, while on
the 20 and 80 meter bands, the stations
will be transmitting on the upper side-
band.

5-5. AM RECEPTION
1. For AM reception, set the receiver con-
trols as follows:
FUNCTION . . . . .
.. AM
BAND SELECTOR. .. Desired band
CAL-OFF . . . . . . .. OFF
RF GAIN . . . • . . . .. Maximum clock-
wise
ANL-OFF . . . . . • .. OFF
SELECTIVITY-BFa.. Maximum counter-
clockwise
AUDIO GAIN ....... Maximum clock-
wise
ANT TRIM. . . . . . .. For maximum
background noise
CAL RESET. . . . . .• Previously set
(para. 5-2)
2.
Rotate the MAIN TUNING control to
locate an AM Signal. Reduce the volume
as required (see step 3). Tune the MAIN
TUNING control for maximum indica-
tion on the carrier level meter.
3. Rotate the AUDIO GAIN control to main-
tain the desired listening level through-
out the tuning process.
4. The selectivity of the receiver may be
increased by rotating the SELEC-
TIVITY-BFa control clockwise. Maxi-
mum selectivity is attained at a point
just below the point where the circuit
begins to oscillate.
5. Rotate the RF GAIN control counter-
clockwise to reduce background noise
to a minimum while maintaining an
adequate listening level.
6.
Rock the ANT TRIM control for maxi-
mum indication on the carrier level
meter.
7. To reduce excessive noise, such as
atmospheric static and ignition noise,
set the ANL-OFF switch to the ANL
position.
SECTION VI
SERVICE DATA
6-1. TUBE AND DIAL LAMP REPLACEMENT
To gain access to the tubes and dial lamps,
remove the chassis from the cabinet (see para.
6-2). The location of the tubes and diallamps are
shown in figure 8.
6-2. CHASSIS REMOVAL
The chassis may be removed from the cabi-
net by removing the four screws from the rear of
the cabinet. When removing the chassis from the
cabinet,care should be taken not to damage any of
the components.
6-3. CARRIER LEVEL METER ADJUSTMENT
To adjust the carrier level meter, discon-
nect antenna and short the antenna terminal to
the ground terminal. Set thE; RF GAIN maximum
clockwise, and the SELECTIVITY-BFa control
maximum counterclockwise. Set the ANL-OFF
switch to the OFF position and turn the receiver
on by rotating the FUNCTION control to the AM
position, allowing approximately five minutes to
warm-up. Adjust the carrier level meter contro>
70
on the rear of the chassis (see figure 9) until the
carrier level meter reads "0".
6-4. DIAL CORD RESTRINGING
Remove the chassis from the cabinet to re-
string the dial cord (see paragraph 6-2). Rotate
the tuning drum fully clockwise (tuning capacitor
plates open). Care should be taken not to damage
the capacitor plates. Referring tofigurel0for the
stringing procedure, tie the dial cord to the dial
cord spring and follow the arrows andthe number
sequence to restring the dial cord. Keep just
enough tension on the dial cord during stringing to
prevent it from slipping off the tuning drum or
idler pulleys. When the other end of the dial cord
is tied to the dial cord spring, the spring should
be expanded about 1/4 inch.
Place the pointer on the pointer rail and en-
gage the dial cord, but do not crimp the clips.
Rotate the MAIN TUNING control fully coun~r-
/
clockwise to close the tuning capacitor. Keeping
the tuning capacitor closed, align the pointer with
the mark approximately 5/16 inch to the left of the
50-MC mark on the 6 meter band. Crimp the clips
to prevent slippage. Replace the chassis in the
cabinet.

V5
:!!
co
c:
.,
It
:0
V4
til
0
-
SlC
-
0
-3
-
<:
it"
T3
~
l>
V3
c.Q"
:l
T2
3
It
:l
-
'"
R40
METER ADJ
LIS
(SOM)
RI7
S
EL ECTIVITY
V2
BFO S4
AN L-OFF
Vl SlO Ll{SOM) SIF L3(2 0M)
- L4(i5M)
L5 (1 0M)
L6(6M)
L2(40M)
SlE
L9(i5M)
LIO(20M)
LS (10M)
lI2(SO-40M)
- L7(6M)
SIB
L13(6M)
Ll4(10M)
Ll6(20M)
1I5(15M)
R4 S3 SI JI S2
RF CAL-OFF BA ND F U N C ~ON
GA IN Ll7 SELEC
TO R S lA
(40M)
092 - 0\ \238

o 3
__ ~L------~~ //
~~~~~/
'-''''-
r 092-009'562
Figure 10. Dial Restringing.
TROUBLESHOOTING CHART
Symptom
No reception of any signals on
any
band on speaker or phones
but with tubes and pilot lights
lighting.
Reception of AM signals but
no reception of intelligible CW
or SSB signals.
No signals on anyone band.
Probable Cause
vt, V2, V3, V4, V5 defective;
CR2, CR3 defective. Open
AudioTransformer. C52, C53,
C54
shorted. Open Filter Re-
sistor R46.
Any component
associated with
vt, V2, V3, V4, and/or V5
that may become defective and
open
or short the signal cir-
cuit.
Triode ()scillator section of
V2 6U8A defective.
Antenna coils Lt, L2, L3, L4,
L5 and/or L6 open or shorted.
RF coils L7, L8, L9, LtO,
and/or Lt2 shorted or open.
Oscillator coils Lt3, Lt4,
L15, L16, L17, and/or L18
open
or shorted •
• 12 •
Suggested Remedy
Replace defective tube. Re-
place defective diode rectifier.
Replace Audio Transformer.
Replace defective capacitor.
Replace resistor.
Replace defective component
after determining cause by re-
ferring to the voltage chart
(figure 11) and the schematic
diagram (figure 12), measur-
ing voltages at various signi-
ficant points, etc.
Replace 6U8A tube.
Replace defective coil.
Replace defective coil.
Replace defective coil.

TROUBLESHOOTING CHART
Cont.
Symptom
Probable Cause Suggested Remedy
No signals
on anyone
band
Also open or shorted capaci-
Replace defective capacitor.
(cont.) .
tors associated in the circuit
with the above Antenna, RF,
or Oscillator coils (Refer to
Schematic Diagram).
Defective Bandswitch
contact
Replace defective section.
on one or more wafers.
Weak signals on all bands.
VI, V2, V3, V4, and/or V5 de-
Replace defective tube.
fective.
Numerous
obscure
troubles which
may occur with any well-designed electrical equipment
may occur in this receiver as well. Therefore, should any trouble occur that may not be readily
corrected with the suggestions contained in the above trouble shooting chart, refer to service and
operating questions, paragraph 4-13.
S METER AMP AND
AUDIO OUTPUT
VS 6AW8A
AVC .DET. ANL
AND FIRST AUDIO
NOTES:
CONTROL
FUNCTION
BAND SELECTOR
CAL-OFF
RF
GAIN
ANL
OFF
SELECTIVITY BFO
AUDIO GAIN
IF AMP
V3 CiBA6
SETTING
CW SSB (AVC OFF)
15 METER
OFF
MAXIMUM CLOCKWISE
OFF
MAXIMUM
COUNTERCLOCKWISE
MAXIMUM CLOCKWISE
* READINGS VARY WITH BAND SELECTION.
n·2S VOLTS WITH CAL-OFF SWITCH IN
·CAL" POSITION.
VOLTAGE READINGS TAKEN UNDER THE FOLLOWING CONDITIONS
I. LINE VOLTAGE ; 117 VOLTS, 60 CPS. A.C.
2. ALL VOLTAGES MEASURED BETWEEN TUBE. SOCKET TERMINALS
AND CHASSIS UNLESS OTHERWISE SPECIFIED.
3.
ALL VOLTAGES ARE D.C. AND POSITIVE UNLESS OTHERWISE
INDICATED
D.C. AND A.C. VOLTAGES MEASURED WITH A
20,000 OHMS -PER-VOLT METER.
Figure lJ. Voltage Chart .
• 13 •
RF AMP AND
MIXER OSCILLATOR
092 -009066

SECTION VII
ALIGNMENT
7-1. GENERAL
This receiver has been carefully aligned at
the factory by specially trained personnel using
precision equipment. Alignment of the receiver
should not be required unless the receiver has
been tampered with or component parts have been
replaced in the IF or oscillator stages.
Two methods of aligning the IF and oscil-
lator stages are described in the following para-
graphs of this alignment procedure. Method one
requires only a non-metallic alignment tool for
adjusting the slugs in the IF transformers and a
1650-KC crystal inserted into the crystal socket
for IF alignment. A Similar non-metallic align-
ment tool for adjusting the slugs in the oscillator
coils and a 3.5-MC crystal inserted into the crys-
tal socket provides an accurate method of oscil-
lator alignment on all bands. Methodtwo requires
the same non-metallic alignment tools for adjust-
ing the slugs in the IF transformers and oscil-
lator coils, a signal generator , a 0.02-mfd capa-
citor, a 27 -ohm resistor and an output meter (AC
scale of a VTVM or a conventional output meter).
7-2. IF ALIGNMENT, METHOD ONE
EQUIPMENT REQUIRED
1. 1650-KC crystal
2. Non-metallic alignment tool for IF
transformers
PROCEDURE
1. Disconnect antenna and remove the
chassis from the cabinet (see para.
6-2).
2. Insert 1650-KC crystal in crystal socket
(see fig. 8).
3.
Set controls as follows:
ANT
TRIM. . . . . •. Center of range
CAL RESET. . . . .. Center of range
FUNCTION. . . . . .. AM
BAND
SELECTOR .. 10
MAIN TUNING. . . •• 29.0 MC
CAL-OFF ...•.•.. CAL
RF GAIN • . . . . • •• Center of range
• 14.
ANL-OFF ...
OFF
SELECTIVITY-BFO .. Maximum counter-
clockwise
AUDIO GAIN ...•... Any position
4. Adjust RF GAIN control until carrier
level meter reads approximately 89.
5. Adjust the slugs in the IF transformers,
T3 and '1'2 (see figures 8 and 9), for
maximum deflection on the carrier
level meter; make adjustments in the
following
order.
NOTE: Mter each adjustment, bring
the meter reading back to 89.
T3 secondary (top of can)
T3
primary (bottom of can)
T2
secondary (top of can)
T2
primary (bottom of can)
6. Repeat step 5 for final peaking of IF
transformers.
7. Set the CAL-OFF switch to the OFF
position and remove the 1650-KC crys-
tal.
7-3. OSCILLATOR ALIGNMENT,
METHOD ONE
EQUIPMENT REQUIRED
1. 3.5-MC crystal
2. 2.2K ohm test resistor
3. Non-metallic alignment tool for tIle
oscillator coils.
PROCEDURE
1.. Insert 3.5-MC crystalin crystal socket.
2. Set controls as follows:
ANT TRIM
........ Center of range
CAL RESET . . . . . . . Center of range
FUNCTION ...•... '. CW-SSB
BAND SELECTOR ... As indicated in
step 4
CAL-OFF ......•.. CAL
RF GAIN . . . . . . . . • Center of range
ANL-OFF ......... OFF
SELECTIVITY -BFO. . Maximum clock-
wise
AUDIO GAIN. . . . . . . Maximum clock::'
wise
MAIN TUNING ...... As indicated in
step 4

3. Set the indicated controls and install the
2.2K
ohm test resistor across the 47K
ohm resistor, R34. This resistor is
connected between terminal 2 on crys-
tal socket XYI and GND lug 3 on tube
socket XV1.
NOTE
The 2.2K ohm test resistor must
be removed before calibrating the
oscillator on the 15, 10, and 6
meter bands.
4. Slowly adjust the slug in each oscillator
coil as indicated in the following table.
Readjustment of the RF GAIN control
will be required to maintain a comfort-
able listening level.
5. Set the RF GAIN control fully clockwise
when adjusting the 15, 10 and 6 meter
oscillator coils. Refer to Figure 9 for
location of the oscillator coils. All
oscillator coils should be adjusted for
the loudest zero-beat signal.
6. Connect an antenna to the receiver and
check each band's approximate calibra-
tion. Should any band's calibration not
test correctly, you have selected an im-
age zero beat and it will be necessary
to recalibrate the band in error.
7. Set the CAL-OFF switch to OFF.
B. Connect the antenna; adjust the RF coils
L7, LB, and L9 for maximum noise while
readjusting the RF GAIN control as nec-
essary to maintain a comfortable lis-
tening level.
BAND MAIN ADJUSTMENT
SELECTOR TUNING
BO(OSC) 3.5 MC
40(OSC)
7.0MC
20(OSC)
14.0 MC
15(OSC) 21.0 MC
15(RF) 21.25 MC
10(OSC) 2B.0 MC
10(RF) 2B.75 MC
6(OSC)
52.5 MC
6(RF)
51.5 MC
7-4.
IF ALIGNMENT, METHOD TWO
EQUIPMENT REQUIRED
1.
Signal generator
2. Output meter
3. 0.02 mfd capacitor
4. A non-metallic alignment tool for IF
transformer slugs.
PROCEDURE
1. Disconnect the antenna and remove the
chassis from the cabinet (see para.
6-2).
2. Preset the controls as follows:
ANT TRIM
CAL
RESET
FUNCTION
BAND
SELECTOR
MAIN TUNING
CAL-OFF
RF GAIN
ANL-OFF
SELECTIVITY -BFO
AUDIO GAIN
Center of range
Center of range
CW-SSB
10
29.0 MC
OFF
Maximum clock-
wise
OFF
Maximum count-
erclockwise
Maximum clock-
wise
3. Connect the high side ofthe signal gene-
rator through the 0.02 mfd capacitor to
pin 2 of the oscillator mixer tube (V2A)
and the ground side to the chassis (see
figures B and 9).
4.
Set the signal generator frequency to
SLUG IN
LiB
L17
L16
L15
L9
L14
L8
L13
L7
ADJUST FOR
Zero-Beat
Same as above
Same as above
Same as above
Maximum Noise
Zero-Beat
Maximum Noise
Zero-Beat
Maximum Noise
1650 KC (1.65 MC).
5.
Connect the output meter across the
SPKR terminals with speaker connected
and adjust the signal generator output
(modulated 400 CPS) for adequate indi-
cation on the output meter, approxi-
mately 25 milliwatts.
6. Adjust IF transformer (T3 and T2) slugs
for maximum indication on the output
meter in the order listed below, re-
adjusting signal generator output, if
necessary, to maintain an indication on
the output meter, of approximately 25
milliwatts.
T3 secondary (top of can)
T3
primary (bottom of can)
T2
secondary (top of can)
T2 primary (bottom of can)
7.
Repeat step 6 for final peaking of IF
transformers.
B. Disconnect the signal generator and the
0.02 mfd capacitor.
7-5. OSCILLATOR ALIGNMENT,
METHOD TWO
EQUIPMENT REQUIRED
1.
Signal generator
- 75 -

2. Output meter
3. 27-ohm resistor
4. A non-metallic alignment tool for the
oscillator coil slugs.
PROCEDURE
1. Preset the controls as follows:
ANT TRIM
Center of range
CAL RESET
Center of range
FUNCTION CW-SSB
BAND SELECTOR 80
MAIN TUNING 3.5
MC
CAL-OFF
OFF
RF GAIN
Maximum clock-
wise
ANL-OFF
OFF
SELECTIVITY-BFO
Maximum counter-
clockwise
AUDIO GAIN
Maximum clock-
wise
2. Connect the high side oi the signal
generator through the 27 -ohm resis-
tor to the antenna terminal and the.
ground side to chassis.
3. The output meter should still be con-
nected across the SPKR terminals.
4. Set the signal generator frequency to
3.5 MC.
5. Adjust the signal generator output
(modulated 400CPS) for adequate output
indication on the output meter, approxi-
mately 25 milliwatts.
BAND MAIN SIG. GEN.
SELECTOR TUNING FREQUENCY
80 3.5
MC 3.5 MC
40 7.0 MC 7.0 MC
20
14.0 MC 14.0 MC
15 21.0 MC
21.0MC
10 28.0
MC
28.0 MC
6 *50,0 MC 50,0
MC
6. Rotate the slug in oscillator coil L18
counterclockwise to end of travel; ro-
tate the slug clockwise until the 400
CPS audio
signal is heard in the
speaker. Rock slug slowly back and
forth until maximum deflection is indi-
cated on the output meter, and the
speaker audio level is maximum.
7. . Adjust the oscillator coils for the re-
maining bands by setting the controls
and making adjustments as indicated in
the following table. Readjust signal
generator output, if necessary, to main-
tain a reading of approximately 25 mil-
liwatts on the output meter.
8. RF Alignment on 6, 10, and 15 meters.
15 meters: After the oscillator alignment
has been complettld, set MAIN
TUNING control to 21.25 MC.
Ttine Signal
gener ator until
maximum output is noted at
SPKR jack. Adjust the ANT
TRIM
for maximum outputwhile
slightly rocking the signal gene-
rator output back and forth. Ad-
just L9 for maximum output
while slightly rocking signal
generator output.
10 meters: Same as above; adjust L8 with
main tuning and signal gene-
rator at 28.75 MC.
6 meters: Same as above; adjust L7 with
main tuning and Signal gene-
rator at 51.5 MC.
ADJUST ADJUST FOR
L18 Maximum deflec-
tion on the output
meter.
L17
Same as above
L16
Same as above
L15
Same as above
L14
Same as above
L13
Same as above
*If
the signal generator to be used is not calibrated to 50 MC,it may be set
to 25 MC, thus utilizing the second harmonic which is 50 MC.
- 16.

VIA
1/2 GAZ8
RF AMPL
/60 V
V2A
1/2 GU8A
MIXER
/70V
V3
6BA6
IF AMPL
/SOV
V4
6T8A
Ave, DET.,ANl.,
1ST-AUDIO
OOV
60V
~6l[
.-------,l r SIE
I
R2
r-~2~2 __ -. __ ~~s~rr:::~2~~90~V--~~
1
o.ov m---< l;RS l.C7
;f' C2 3 5 4 ~33K 1_ .01
47MMF O.65V ~
4~,~MF O.OV 2 --~ 3 SOV ~~ r~o- 2.S~K~ -'f~s 8SV
i
IO~ .!.s1(~!~ ~ r-IA-N-L-'-S°"-4F--F---'1 .--_..:;o~.~"'-'-~ ~~_~r __ )8 -O.IV
..... 4
JIl
j--.,.......:.;.;....,...::. ... \!:,;:- I ~ I ~: oolv\i:.-~ 1: : R22 R23 ANL .-~ ,----.
7Q2V RI2 .bCIS I I) kI . 1.8V 7 2R22~ IC'9 I ~I IMEG I MEG 10 L 3 1
L-- 33K T·
O' I W I
.01 1 L.... ..... ..:.I::-1'-'VVO'-_---'l---_.::.3~/ ov 7 ov
RII~CI3 ~ L4--2~ q~6T ~ L4 --
C
:-'r=- C241 +-_O_F_F __ + ____ ....
R30
220K
hC28
ANT~~:R ~6 .U- W
REAR
~ I L3 .----H-h ~ \S
12 }- 3 20 ~ !r f>3
4\
rrv
0))S::; 54 '- r-:-- ~
~~51 T~ ~r---I-++-...J 2'r'12
L---~~L- /1 \---
RI
I MEG
C3 I
.
01
1
D
T5 ~ It. CI
L----.:.:::.--t L- 11' ANTENNA
~S ~
NOTES:
I. UNLESS OTHERWISE SPECIFIED:
ALL RESISTORS ARE IN OHMS,! 10%,1/2WATT,
ALL CAPACITORS ARE IN MFD,
VOLTAGES ARE DC READ FROM POINT INDICATED
TO CHASSIS.
2. BAN D SELECTOR SWITCH SI SHOWN IN BO
METER POSITION.
3. FUNCTION SWITCH S2 SHOWN IN OFF POSITION.
TRIMMER
>--
C4
.01 r
~c
R4
12K
R5
10K
R3
SB
r1C5
r·
OOS
C29
-,. 2~¥MF
Ll3P~
6
4. SEE FIGURE OF CHASSIS BOTTOM VIEW, FOR ~gl~MF
LOCATION OF ROTARY SWITCH SECTIONS. Ll4 h
5. ARROW ON POTENTIOMETER INDICATES 10 .~
R4 MAXIMUM RF GAIN ~ C33
RI7 MAXIMUM SENSITIVITY
r++-_-+---'~IMMF
R2B MAXIMUM AUDIO GAIN 12:~2 Ll5y 'h
6.FOR FREQUENCY OF CRYSTAL USED,aOPERATION l~ 1
15
- " -
OF CRYSTAL OSCILLATOR CIRCUIT REFER TO ~ ~ ~ ~ C35
(I) CALIBRATION PROCEDURE PARAGRAPH. ~~~ '-+-+-+---+--S-, ~ 2S
i5MMF
(2) ALIGNMENT PROCEDURE SECTION. SIB 5 f-- ~b:V J-'lF
7. "* CHASSIS GROUND REAR S W I~~~MF
~~p~
~
U
Ll2
80
RB
IK
~
J C.39
SIA 159MMF
-Z~1
~1f I
~ I
SIA I
REAR)
56 /
4~/// II ~
3@ C41)f ~r~C42
2" rcALl 1 MAIN
I 12 ~ ~ TUNING
~
LIB~
BO:;.-yr-- __________ --'
W
TI GREEN
8LACK
6.3
VAC
VI?, V2 :
4
V3
3
S
V4
4
4
V5
S
LM2
R9
lOOK
S8 I .01 "*c~ RIS RIB JIOO 1 0.1 r
.01 RI4 l±.J,c,. 22K t_ C~I R4274K
~ rCI4 I.SK 82 %Irr R21 MMF - TJ,~1 ~2J\ hI..
IK 'c7~ J- I
R31
47K
ro.1
CI2
CAL 3 OFF
10
MMF
,.,1 5*
2
RIO
47K
~
~
4 6 S3
ICAL-OFF I
V2B
1/2 GU8A
ose
100V
C43 II
47M,MF -o.sv ~
R32
22K
IO,5QV- ~ ~ 250V R2S R28 1------4
270K SOOK C27
-! RI7
RI9
2K
lOOK
I--t---r-I-I..",..-T----;I~A-U-D-IO--,I- .005
GAIN
C22 1 R2S R27
100 I I
MEG
150K
R29
10MEG
! SELECTIVITY!
MMF ~
BFO
&~f
10
~~
Rls<i
47K
S2
FRONT
R.36
I MEG
R3S V5A
C5B C46 lOOK 1/2 6AW8A
56MMF .O~L
°1 ]0-- VIB METER AMPL
,", 112 6AZ8 c1~ I60V
YI 0.0. CRYSTAL .01.;!i-'R38
CRYSTAL c:::J 8 2~.3 I.BK
(SEE NOTES)
9?-~ OSC
I a/v 7 -~~ C55 ~Hf---<~~""·~!;,7f-1--~
C45; 1t R34 .02 ~ MEG
27 47K ~
MMF ~
R.39
560
C
R40
2K
METER
ADJ.
\ MI
+
AVC
1"::-
i~
~~+_------------------------2~~~ FOR
3 _ AUXILIARY
r--+-I--+---I--------------------------4:(I;) ~ FUNCTIONS
41 ......
2 2
11\ 3
(J~
La'17 S2
REAR
R42
10 MEG
R41
470K
V58
1/26AW8A
AUDIO OUTPUT
WHITE
C48.L
000S1
~/5V
T4 II
Ir-~ /7SV 8, ___
OV
7\.;-~
63.
8V
R43
IBO
i:,!;,-C49
':-1' 10
z
~
0
a::
ID
JI
I PHONES I
YEL
R44
27
IW
'-
BLK
{;
~ R45 CR2 R46
cso.J,. 10 IN.325~ 225V B20,2W /75 V /7SV
PLI .01 P r~r~~--~~~~~~--~----~Z~2~5~V~---------------------------------------------------------- ~--------------------------------~------~2~2~5~V~------~
'- ____ + ...... 50V
II7 VAC
ON REAR
C52 +
40
-+ C54 R47
150V
-
40
lOOK
250V
IW
+ C53
~
40
CR3
ISOV
IN.3~~4
FUNCTION SWITCH
60""
C51 ~ llJ8SVAC
.01
2 I
rR=ED~ ______ ~
ON/OFF SWITCH 089-002022 E
~
Figure J2. Schematic Drawing.

SERVICE PARTS LIST
Schematic Hallicrafters Schematic Hallicraiters Schematic Halhcraiters
Symbol
Description Part Number Symbol Description Part Number
Symbol Description
P~lrt NurniJpr
CAPACITORS
"RESISTORS (cont.) SWITCHES
Cl 5.2-25.8 mm!., ANT TRIM 048-000492 RIO, 15, 24, 31, 34
SI SNitch, Rotary. BAND
060-002388
C2, 9, 43 47 mrnf., 500V, 2%; Dura- 482-151470 47K ohm 451-252473 SELECTOR
mica
R13 15K ohm 451-252153
S2 Switch, Rotary. FUNCTION 060-002267
C3, 4, 7, 13, 14, 15, 17, 18, 19. 47, 56 R16 1.5K ohm 451-252152
S3 S\·:itch.
DPDT. CAL-OFF 060-002260
.01 mId., 500V, 20%; Cer. 047-100224
R17 Resistor, Var., SELEC-
025-001944
S4 Switch, SPOT. ANL-OFF 060-200967
Disc TIVITY; 2K ohm
C5, 8, 27,46,48 R18 82 ohm 451-252820
.005 mId.,
500V, 20%; Cer .
047-100442
R20,32 22K ohm
451-252223
JACKS. PLUGS. AND SOCKETS
Disc R21 2. 2K ohm 451-252222
C6, 23, 24 .1 rnfd., 200V, 20%; 499-014104 R26 270K ohm 451-252274 Jl Jack. Phone
036-100002
Moulded Paper
R27 150K ohm
451-252154
PLI Line Cord and Plug-
087-10J078
CI0, 11,44,55 R28 Resistor, Var., AUDIO
025-001942
XV3 Socket. Tube; 7 pin min.
006-000946
.02 rnfd., 500V, +80-20%; 047-100242 GAIN; 500K ohm
XVI. 2, 4. 5
eer. Disc
R29,42
10 megohm 451-252106
Socket. Tube: 9 pin min.
006-000947
C12 10 mrnf., 500V, 2%; Dura- 482-131100 R30 220K ohm 451-252224 XYI
Socket.
Crystal
006-100346
mica
R33 10K ohm, 10%; lW
451-352103
Socket. Pilot light. left
086-000541
C16,49
10 rnfd., 50 V; Electrolytic 045-000724 R37 2.2 megohm 451-252225 Socket, PIlot light. right
086-000542
C20, 22 100
mrnf., 500V; 10%; Cer.
047 -201182
R38
1.8K ohm 451-252182
Disc
R39 560 ohm
451-252561
C21 8
mId., 250V; Electrolytic 045-000721 R40 Resistor, VaT., (Carrier
025-001943
TUBES AND LAMPS
C25,26 .001 mId., 500V, GMV; Cer. 047-200230 Level Meter); 2K ohm
Disc
R4\
470K ohm 451-252474 VI 6AZ8; HF Amplifier.
090-901417
C28 .1 rnfd., 400V, 20%; Moulded 499-024104
R43
180 ohm 451-252181 Crystal Marker
Paper R44 27 ohm, 10%; lW
451- 352270
V2
6U8A; Mixer, Oscillator 090-901285
C29 22 mmf., 500V,
2%; Dura- 482-151220
R45 10 ohm 451-252100 V3 6BA6; IF Amplifier
090-901112
mica R46
820 ohm, 10')(.; 2W 451-652821
V4 6T8A; AVC. Det. ANL.
090-901403
C31 56
mrnf., 500V, 2%; Dura-
482-161560
R47 lOOK ohm, 10%; 1W
451-352104 1st Audio Ampllfier
mica V5 6AW8A; Carrier Level Meter 090-901103
C33 330 mrnf., 500V, 2%; Dura- 482-161331 "All RESISTORS are 10')(, 1 2 watt, carbon type,
Amplifier, Audio Output
mica
unless otherwise specified. LM1,2 Pilot Lamp #47
039-100019
C35 265 mrnf., 500V,
2%;
493-122650-334
Duramica TRANSFORMERS
MISCELLANEOUS PARTS
C37 175 mrnf. , 500V,
2%;
493-121750-334
Duramica Tl Transf ormer, Power
052-000853
Cabinet Weld Assembly
150-900785
C39 59 mm!., 500V, ±2%;
491-104590-83
T2,3
Transformer,
IF
050-000751
Clip, IF Transformer 076-100385
N470; Cer. Tub.
T4
Transformer, Audio Output 055-000460
Mountl!1g
C41
Capacitor, Var.; CAL RE-
048-000510 CRl
Diode, Silicon
019-102354
SET
CH2,3 Rectifier, Silicon, IN3254
019-002939-02
C42
CapaCitor,
Var.; MAIN 048-000494
COILS
Dial Cord
038-000049
TUNING
Dial Plate
063-005042
C45 27 mmf., 500V, 2%; Dura- 482-151270 Ll Coil, Antenna (80 Meter Band) 051-002970
Dial Window (c.llibrated)
083-000915
mlca
L2
Coil, Antenna (40 Meter Band) 051-002971
Front Panel We ld Assembly 150-000509
C50,51 .01 rnfd., 1400V, GMV; Cer. 047-200752
L3 Coil, Antenna (20 Meter Band) 051-002972 Knob. ANT TRlM.
CAL
015-001564
Disc L4
Coil, Antenna (15 Meter Band) 051-002973 RESET
C52,53 40 rnfd., 150V; Electrolytic 045-000725
L5
Coil, Antenna (10 Meter Band) 051-002974
Knob. FUNCTION. BAND
015-001725
C54 40
rnfd., 250V; Electrolytic 045-000722
L6 Coil, Antenna (6 Meter Band) 051-002975
SELECTOR
C58 56 mm!., N750, 5%; Cer. 491-105560-95 L7 Coil, RF (6 Meter Band) 051-003156 Knob, R. F. GAIN. AUDIO
015-001464
Tub. L8 Coil, RF (10 Meter Band)
051-003157 GAIN. SELECTIVITY -BFO
L9 Coil, RF (15 Meter Band)
051-003158 Knob. MAIN TUNING
015-001736
"RESISTORS LI0 Coil, RF (20 Meter Band) 051-002966 Lock, Line Cord 076-200397
L12
Coil, HF (80 Meter Band) 051-002964
POinter, Main Tuning
082-000489
Rl, 22, 23, 25, 36 L13 Coil, Oscillator (6 Meter 051-002963 POinter, Track Assembly
150-000711
1 megohm 451-252105 Band) Ring, Retaining 076-100883
R2 22 ohm
451-252220
L14 Coil, Oscillator (10 Meter 051-002962 Ml Carrier Level Meter 082-000492
R3,11 68 ohm 451-252680 Band)
Shaft, Main Tuning
074-002451
R4 ReSistor, Var., R.F. GAIN, 025-002040 L15 Coil, Oscillator (15 Meter
051-002961
Shield, Pilot Lamp
086-100037
12K ohm Band)
Spacer, Track
073-003695
R5 10K ohm
451-252103
L16 Coil, Oscillator (20 Meter 051-002960 Spring, Dial Cord 075-000838
R6,12 33K ohm
451-252333 Band)
Terminal Board, Antenna
088-202026
R7 15K ohm,
10%,
lW 451-352153 L17 Coil, Oscillator (40 Meter 051-002959 Terminal Board, 4 contact
088-002411
R8,14 lK ohm 451-252102 Band)
Terminal Board, Speaker
088-002412
R9, 19, 35 L18 Coil, Oscillator (80 Meter
051-002958
Washer, Spring 004-002408
lOOK ohm 451-252104 Band)
Yl
Crystal, Quartz (OSCillator) 019-002720