Hammarlund HQ-180 Series Manual

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I COMMUNICATIONS
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T.CHNICAL
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OP.RATING
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INSTRUCTIONS
HAMMARLUND MANUFACTURING COMPANY, INC.
A Giannini Scientific Co.
73·88 Hammarlund Drive, Mara Hill, North Carolina
Export Department: 13 Eaat 40th Street, New York 16, N. Y.
52787-1
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In order that the Hammarlund Manufacturing Company may
more effectively process customer complaints and warranty, as
well as non-warranty repairs and modifications, a Customer
Service Group has been established at our factory, located in
Mars Hill, North Carolina.
The scope of this group will include all direct correspondence
with the customer and with warra.nty repair stations, jobbers and
representatives. It will also include factory repair facilities.
As you can see, this is a true "service" organization, inter-
e sted only in satisfying the custome r •
In the future, please address all correspondence of this nature
to:
Hammarlund Manufacturing Company
Mars Hill, North Carolina
Attention: Customer Service
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THE HQ-180 AND 180-A
SERIES OF COMMUNICATIONS
RECEIVERS
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THE HAMMARLUND 180 AND 180-A SERIES OF
COMMUNICATIONS
RECEIVERS
CONTENTS OF INSTRUCTION AND SERVICE MANUAL
Specifications
Circuit Description
Installation
Operation
Service and Maintenance
Removing and Replacing
The Chassis
Removing and Replacing
The Front Panel
Alignment Procedure
Tube Socket Voltages
Tube Socket Resistances
Parts List
Schematic Diagram
Page 3
Page 6
Page 9
Page 17
Page 24
Page 35
Page 37
Page 45
Pages 58,60,62,64
Pages 59,61,63,65
Page 66
Page 76
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HQ-180 AND 180:-"A" SERIES SPECIFICATIONS
Frequency Range Covered:
. 54-1. 05mc/s; 1. 05-2. 05 mc/s; 2.05-4.04
mc/s; 4.0-7.85 mc/s; 7.85-15.35 mc/s;
15.35-30. Q mc/s.
Bandspread Calibration:
Dial markings every 5 kc/s on 15, 20, 40
and 80 meter bands; every 10 kc/s on 10
meter band; plus arbitrary 0-100 logging
scale.
Maximum Audio Output:
1. 0 Watt (Undistorted)
Passband Tuning Range:
plus/minus 3 KCS with calibration every 1
KC. 8:1 vernier tuning ratio.
Output impedance:
3.2 Ohms (E lA Standard) plus 500 Ohms.
AVC Action:
Operates on RF and 3 1F stages. Provides
fast charge--adjustable discharge smooth
acting A VC. De layed AVC applied to the RF
stage. Better than. 001 second attack time
and. 01- .1-1 second decay time. Off
position.
Adjustable Selectivity and Selectable Side,
bands:
6 db bandwidths 'Upper sideband--1-2-3 kcs
Lower sideband--1-2-3 kcs Both sidebands· ,-
. 5-2-4-6 kcs
Sensitivity:
An average of 1. 5 microvolts produces 10:1
signal-to-noise ratio on AM approximately
. 7 uv on CW and SSB.
Antenna Input:
50 to 600 ohms; balanced or unbalanced.
Antenna Compensator:
Permits compensation for loading effects ot
various type antennas, or balanced trans-
mission line.
Beat Frequency Oscillator:
Variable from zero beat plus/minus 2 kcs
plus fixed position for SSB.
S
lot Filter:
Range plus/minus 5 kcs of center frequency.
Attenuation over plus/minus 5 kcs range
provides over 40 db. Calibrations every
1 kc. Maximum attenuation using slot
depth control is 60 db. 8:1 vernier tunln<}
ratio.
Tube Complement:
6BZ6 RF Amplifier
6BE6 1st Converter
6C4 HF Oscillator
6BE6 2nd Mixer-Crystal Osc.
6BA6 455 kc Gate
6BA6 455 kc IF Amp.
6BE6 3rd Mixer-Variable Osc.
6BAS 60 kc 1F Amp.
6BA6 60 kc 1F Amp.
6BV8 60 kc IF amp. AVC-AM Det.
12AU7 SSB Product Detector
6AL5 Noise Limiter
12AU7 BFO-"S" Meter Amplifier
6AV6 1st A F Amp. - Delayed AVC
Clamp
6AQ5 Audio Power Output
OA2 Voltage Regulator
6BZ6 Crystal Calibrator
6CW4 Crystal Oscillator
Semiconductor Complement:
Rectifier -- Two 800 P. I. V. at 1/2 amp .
Power Supply:
105-125 Volts 50-60 cps. a.c. power con-
sumption. 120 watts .
"S"
Meter:
Calibrated 1 to 9 in steps approximately
6 db. Also includes db scale, above 5-9
to plus 40 db. (Meter deflects on all types
of signals. )
Noise Limiter:
Adjustable series type provides both
positive and negative clipping.
'
-3 -
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Front Panel Equipment:
Main Tuning
Bandspread T ni
Vernier or Bandpa s Tuning
Sensitivity (RF Gain):
on/off switch
Selectivity: 0.5-1-2-3 Kcs.
(per sideband)
Sideband: Upper-lower-both
Audio Gain
Antenna Compensator
Tuning Range (Band Se lector)
Function Switch: AM-SSB-CW
Slot Freq. Calib.
CW Tone (BFO Pitch)
Noise Limiter, adjustable
-on/off switch
AVC
,
off-slow-medium-fast
Send- Recei ve -Cali brate
Phone Jack
"SI1 Meter
Dial Scale re set
Rear Panel Equipment:
Terminals for speaker connections
3.2 ohm for voice coil
500 ohm for line or VOX
Accessory socket for preamp, Q-multi-
plier or converter. System socket for
simplified associated transmitter /receiver
control.
S-meter controls.
Antenna input terminals plus S0239.
Dimensions:
10-1/2" H x 19" W x 13" D
Wt.
381bs.
Shipping- Wt. 45 lbs.
HQ-180AX
Universal model of the HQ-180A receiver
with provisions for 11 fixed-frequency
crystal controlled channels. Six of the
crystals are easily interchangeable from
the front panel--the balance are located
within the cabinet but are readily accessible
from the trap-door top. 3 kc vernier tun-
ing control permits compensation for minor
frequency varicltions of the crystals.
24 HOUR CLOCK-TIMER
Combination clod: and automatic timer.
Aids in meeting prearranged schedules.
Optional extra.
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IF ANIPLIFIER The 3035 KCS and 455 KCS
IF amplifiers provide eight tuned circuits in
three stages of amplification. Six tuned
circuits in the three-stage 60 KCS amplifier
provide either the second or third conversion
l
depending upon the operating band. All IF cir-
cuits employ iron-core permeability-tuned
transformers for the high performance and
retention of alignment accuracy. The 60 KCS
amplifier se ~ectivity is controlled from the
front panel by seven positions: 1-2-3 KCS on
either sideband, and. 5-2-4-6 KCS on both side-
bands. The skirt selectivity of this system ap-
proaches that of the mechanical filter. A separate
front pane 1 switch is used to select upper, lower,
or both sidebands, providing rapid, simple means
of sideband selection.
SLOT FILTER The slot filter provides a
notch of better than 60 db attenuation over the
entire range of -f 5 KCS from the center IF
(455 KCS) frequency. The slot filter control
provides 40 db attenuation, plus an additional
attenuation of up to 20 db obtainable by use of
the slot depth control at a particular frequency_
The 6 db width of the slot is approximately L 5
KCS.
Accurate frequency adjustment of the slot
is ()btained by means of an 8:1 vernier control.
The slot filter circuit consists of a Bifilar "T"
trap.
SEPARATE VERNIER TUNING -f 3 KCS
vernier tuning allows extra-fine passband
tuning between the 455 KCS IF and the 60
KCS
IF for additional selectivity and easy
tuning of the desired signal.
AVC An extremely fast-attack delayed AVe
circuit is employed. A four position cont:col
on
the front panel permits the selection of
OFF-AVC or SLOW-MEDIUM-FAST AVC
decay time for optimum results on various
signals. The AVe is taken from the high
selectivity 60 KCS IF.
S-METER Readings of signal strength
and "on- the-pomt." tumng indications are
p:covidec;. on all types of signals by a high-
response C3 meter circuit. The scale is
calibrated to 40 db over S-9 and is factory-
calibrated so a signal of approximately 50
microvolts reads S-9. Each S-unit indi-
cates app:roximately a 6 db increase,
equivaleilt to doubling the signal strength.
S-meter js extremely effective on SSB and
CW when using slow decay AVC.
AUDTO The HQ--180A features the ex-
clUSive Hamma:dund Auto-Response which
automatically adjusts the audio passband
to best meet the receiving conditions.. A
(6AQ5)
provides 1. 0 watt for maximum
undistorted output. The Auto-Response
circuit employs controlled feedback which
is decreased as the gain control is turned
up, thus narrowing the audio passband.
As the gain is decreased, the feedback
Increases, thus permitting a greater fre-
quency response in the audio output. The
result is crisper, easier to read sound on
weaker signals, and broader, more real-
istic reproduction on stronger signals.
The audio output may be used with
either earphones or loudspeaker. The
phone plug automatically silences the
speaker upon insertion. The Audio-Re-
sponse permits tops in listening pleasure
of AM, SSB, and CW reception.
- 5 -
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HQ-180A DESCRIPTION
Starting with the front panel layout, the care-
ful selection of high-reliability components,
the craftsmanship of skilled technicians, and
the addition of engineering leadership result
in a receiver worthy of the Hammarlund name
in quality and performance.
The HQ-180A offers the listener a prac-
tically endless combination of tuning techniques
whereby reception of SSB/CW and AM/MCW
may be achieved. Through the use of the
vernier tuning, adjustable bandwidth, and the
basic, precision front-end of the HQ-180A
the user has full control over SSB signals as
well as adjacent, or co-channel signals. If
there's a signal to be received, the HQ-180A
can ferret it out. ..
The HQ-180A is a "hot" receiver. It ~Nill
provide 10 db signal-to-noise ratio at 1. 5
uvolt AM or approximately. 5 uvolt CW, or
better depending on bandwidth. The front end
provides continuous tuning. 54 mc/s to 30
mc/s. The receiver is designed for use with
a single wire flat top, a folded dipole, or
doublet antenna.
CIRCUITRY The HQ-180 is an eighteen
tube triple conversion superheterodyne re-
ceiver (double conversion, . $4 to 7.85
megacyc 'es) that has been designed to provide
the best possible performance for reception
of AM, SSB and CW signals. The most impor,-
tant performance characteristics of a com-
munications receiver have been made adjust-
able by means of the front panel knobs.
The RF tuning system covers the follow-
ing bands:
MAIN TUNING DIAL
.54 to 1. 05 me cal in
10 kc divs.
1. 05 to
2. 05 me cal in
10 kc divs.
2.05 to
4. 04 me, .. cal in
20 kc divs.
4.0 to
7.85 me cal in
50 kc divs.
7.85 to
15.35 Inc cal in
100 kc divs.
15.35 to
30.0 me cal in
100 kc divs.
BAND SPREAD TUNING DIAL
Arbitrary scale 0 to 100 divs.
3.44 to 4.040 me .. cal in 5 kc divs.
6.810 to 7.3 me .. cal in 5 kc divs.
13.980 to 14.425
me .. cal in 5 kc divs.
20.925 to 21. 60 me .. cal in 5 kc divs.
27.
890 to 29. 7 me .. cal in 10 kc divs.
A built-in 100 kcs crystal calibrator
provides marker signals at every 100 kcs
on all bands for checking dial calibration
accuracy.
The dial calibration reset knob enables
you to adjust the frequency calibration to
approach frequency meter standards on
each amateur band.
Starting at the front-end, the HQ-180A
utilizes a (6BZ6) tuned RF amplifier and
a separate mixer (6BE6) and oscillator
(6C4) for a high degree of stabil ity. Ad-
vanced design and modern tube types
account for the very high gain and low
noise factor. Refer to page one for com-
plete listing of the many possible functions
and the complete tube hneup_
Low-loss, coil forms, and bandswitch
wafers, plus temperature -compens ating
capacitors, and the appllcation of regula-
ted power to the oscillator circuit provide
a high degree of sta,bility.
TRIPLE CONVERSION The HQ-180A
offers triple conversion with IF frequen-
cies of 3035 KCS, 455 KCS, and 60 KCS,
providing excellent rejection of image-
re sponse. The second IF is heterodyned
with a crystal-controlled oscillator. The
third IF i.s heterodyned with a high sta-
bility, adjustable oscillator which contains
micro-accurate vernier tuning control,
located on the front panel.
- 6 -
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The HQ-180A Series differs from the 180 Series in the following respects:
1. The powe:r supply is designed for 115/230 v. 50, 60 cycle AC opera-
tion. This applies to the power transformer T-30 and the new filament trans-
former T22.
2. A separate filament transformer is employed, T-22 in the schematic
diagram. This transformer provides 24 hour a day operation of the heaters of
the high frequency oscil.lator and first converter, to reduce initial warm up drift.
In addition, this transformer also supplies the systems socket which is a new
added feature. If the receiver is not to be operated for long p$riods (upwards
of 3 days) the line cord should be removed from the socket.
3. A new accessory socket plus a systems socket has been added. The
accessory socket may be used to power most 6 and 2 meter converters. The
systems socket will be found convenient when the HQ-180AX series of receiver
is employed in conjunction with a transmitter since all of the necessary VOX
anti trip and/or relay connections are available from this socket. This also pro-
vides a rapid disconnect without the need of tools once the installation has been
completed properly. A Coordination Cable is available for use with the HQ-180A
or HQ-170A series of receivers designed primarily for use with the HX-50
Hammarlund transmitter but useable with other transmitters as well. This is
part #PL39286-G1 at $8.50.
4. A new three (3) position BFO switch is provided enabling the BFO to
be
in the off position, SSB, where the BFO is fixed for optimum SSB audio
response with reference to the passband. The CW position enables the BFO to
De adjusted plus or minus 2 KC thus providing the usual pitch control adjustment.
For CW reception, the BFO should always be set plus or minus 500 cycles to
1000
cycles especially in the. 5 KC selectivity position so as to prevent detuning
of the desired signal for the desired pitch.
5. 3.2 ohms and 500 ohms output terminatioQ.s are now provided for voice
coil or line operation. The 500 ohm line termination will be found very advan-
tageous for phone patch and improved anti trip operation of most VOX circuits.
6. The 5U4G tube formerly used in the HQ-180 has now been replaced
with two (2) silicon diode rectifiers thus providing cooler operation and better
regulation from the power supply.
7. The HQ-180AX series of receivers provides an 11 position fixed fre-
quency crystal oscillator assembly which is factory installed in the panel space
provided for the 24 hour clock timer. The knob on this assembly allows selec-
tion of normal variable frequency tuning or anyone of eleven fixed frequencies
crystal controlled. Six crystals are mounted on the front plate of the oscillator
assembly and may be changed quite readily to shift frequency. The remaining
- 7 -
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5 crystals are mounted behind the front panel on the oscillator box and may be
changed by lifting t e top cover of the cabinet. It is intended that the five inside
crystals will be for commonly used channels not subject to being changed very
often. The receiver can be zeroed into the channel frequency by manipulating
the vernier tuning control on the front panel. This will correct for frequency
discrepancy due to crystal toleranc8 and assure accurate "netting".
The use of the crystal controlled oscillator will permit the highly stable
reception of signals on the eleven channels selected. The only operation re-
quired beside turning the selector switch to the desired crystal position is to
turn the band switch to the required position and tune the main dial to the ap-
proximate frequency rocking the knob finally for maximum "S" meter indicatiLm.
In order to ensure proper operation the crystals should be ordered from
your local authorized Hammarlund distributor.
The oscillator or actual crystal frequency for a given signal frequency
shall be determined from the following:
SIGNAL FREQUENCY
ADD IF ----- ._-
SUBTRACT IF-
MODE OF
RANGE mc FREQUENCY mc
FREQUENCY mc
OPERATION
.54 to 1.
05 me ,455000
Fundamental
1. 05
to 2.05 me
.455000
Fundamental
2.05 to 4. mc .455000
Fundamental
4.0
to 7.85 me .455000
Fundamental
7.85 to 15.35
me
3.035
Fundamental
15.35 to 20.662
me
3.035
Fundamental
20.662 to 30.000 me
3.035 2nd Harmonic
NOTE: WHERE LOW SIDE lliJECTION IS SPECIFIED, HIGH SIDE lliJECTION
MAY BE USED AT REDUCED SENSITWITY.
- 8 -
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HQ-180A mSTALLATION
Your Hammarlund Receiver is designed to give you the very best results.
A few minutes to be sure it is installed correctly is worth while. Even though we
have developed the most sensitive circuitry to select and amplify the signal you
want to hear, remember that it can work only on the RF you feed it from your
antenna. It is to obtain the most satisfaction in its operation that we urge you to
put up the best antenna system you can. The HQ-l80A will work very well with
a temporary wire strung out of a window, but only use this method while con-
structing or having constructed a proper antenna system. Finally, a good ground,
serves many purposes; one, it eliminates tendencies towards AC hum pickup,
often straying through homes or apartments; two, it minimizes atmospheric and
man-made noise; three, it ensures a safe path for any voltage coming- fro m a
possible short or from an associated transmitter. Wh<?n using an outside antenna,
it is always best to install a lightning arrestor. Such a device drains off the
atmospheric charge in a safe manner, pr~tecting you, and the Receiver.
Note that all of the Receiver connections are at the rear of the set, and
that there are a variety of very useful terminal points, permitting a number of
important system connections to be permanently attached in a neat manner. The
illustrations belbw show you all of them, allowing you full freedom to use those
that are most useful to you, whether you are only listening or are operating with
a transmitter. The Accessory and System sockets, are all for special applica-
tions associated with reception, but not necessary for ordinary operation. The
speaker and antenna connections are required in any case.
SPKR.
FUSE
ANT 3.2 OHMS o
METER ADJ o
Fl EXT
§ ~
°lea:::Blo
01 @ @ @ 10
EJ RELAY
SENS ZERO o
~
HQ-180 SERIES
ACCESS SOC
B+~ METER ADJ.
o @ @
SENS ZERO
FI~ GND
~
o
o
o 0
ANT SPEAKER
0 I@ €rn 10 0 [@ @ @ @ I 0
G 3.2n5001l.
FUSE
0
JJ
~
~ 8
SYSTEM SOC
HQ-180A SERIES
RECEIVER REAR CONNECTIONS
- 9 -
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Connect a suitable 3. 2-ohm loudspeaker to the 3. 2-ohm terminal screws
as shown in the diagram. Use a Hammarlund S-200 Speaker for best results,
but any equivalent speaker in a cabinet will operate satisfactorily. Do not place
the speaker cabinet on top of the Receiver, because the HQ-180A is a very sen-
sitive set, and speaker vibration can cause regenerative oscillation electroni-
cally, impairing reception. Note that a jack is provided in the lower left corner
of the front of the Receiver for headphone plug insertion. The loudspeaker is
automatically disconnected when the phone plug is inserted.
HEADPHONES
High
impedance magnetic phones will usually be found satisfactory wher
the headphone jack is employed. The phones are deliberately mismatched to
reduce the level into them. If more level or volume is desirable, low impedance
phones may be employed. These may be any of the popular imperiances such as
8, 16 or 24 ohms. If you do not have headphones and desire to purchase a pair,
the low impedance type is suggested since it will always be possible to reduce
the volume by making use of the audio volume control.
Another alternative, if high impedance phones are available, is to perman-
ently connect these to the 500 ohm line output terminals on the rear of the re-
ceiver. The se wi 1 provide more volume than the headphone jack since the head-
phone jack impedance is 3. 2 ohms or the same as the speaker. ("A II Series only. )
d
TO
SPEAKER
3.2Q
SPEAKER
£~
CONNECTION
GNO 3.21l 50 on
0
@®@
o ]
1
6
TO LINE
5000
h
~
LINE
CONNECTION
GNO 3.2n 500n
0
@@@
0
1
3.2l1. SPEAKER 8 500n.. LINE
CONNECTIONS
- 10 -
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The Receiver connections for the antenna and ground are clearly illus-
trated on these pages, and a few hints are given for antenna installation, but
the HQ-180A owner is urged to read a good antenna book to select the best
type for his purpose. The Amateur Radio Relay League publishes this type
of information. Its Antenna Book provides all you need to know about antennas
for both reception and transmission. Other publishers produce equivalent
books on this subject.
After selecting the antenna desired, consult the diagrams in this Manual
to
make the proper connections to the receiver. Following are some tips on
antenna system selection and installation. .
Either a single-wire or a balanced antenna may be used with the HQ-180A.
The front panel antenna trimmer control is designed to permit a good match
to almost all antenna systems of 50 to 600 ohms, balanced or unbalanced. The
coaxial connector is intended to be used for 50-ohms types, the terminal strip
for up to 300 ohms. While general coverage can be obtained from a short wire
of 20 to 50 feet, much improved reception will be developed from an outdoor
single-wire system of 50 to 150 feet in length. It is recommended that the
antenna be isolated as much as possible from near-by objects, buildings, trees,
etc., and that it be located at right angles to power lines or busy highways.
This will minimize interference pickup from the lines or from passing vehicles.
- 11 -
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i 5 (H50FEET
LUG
SINGLE WIRE ANTENNA
~1/2 WAVE •
50 OHM
~-COAXIAL
CABLE
1/2 WAVE LEN61H
= 468
FREQ (MCS)
~l6- COAX PLUG
DIPOLE
75 OHM
TWIN LEAD
...--- (USE 300 OHM
TWIN LEAD FOR
FOLDED DIPOLE)
LUGS
ANTENNA
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The first antenna connection illustration shows the simplest system.
This arrangement provides gooe overall coverage, but if a particular band is
intended to be used consistantly, the use of a dipole tuned to that band is recom-
mended. The illustrations show how such an antenna is made and what Receiver
connections are necessary. For all antennas, the shielded or twin-lead methods
are a decided improvement over the single wire to minimize man-made inter-
ference and noise signals. In especially noisy areas, this may be the only way
to
develop an acceptable signal.
Each of the antenna connection schemes require very little wiring com-
plications or soldering technique. For those familiar with soldering, no trouble
will appear. For those who have never $oldered, it is recommended that some
practice be obtained before attaching a plug to a shielded cable. However, the
experience gained from work on even one hi-fit kit or Joadio is ample for this
work. For convenience, some simple instructions in plug and cable installation
are included in this book. Remember not to apply too much heat, just enough to
allow solder flow ° Excess heat will melt some plastic insulations, possibly
causing a short between the center conductor and the shield.
TO
DIPOLE
TO
SINGLE -WIRE
ANTENNA
MOUNT ARRESTOR
OUTSIDE OF
HOUSE
IF
ANTENNA
POSSIBLE
A
A
© ~r---_~ TO RECEIVER
ANTENNA 6
GROUND
© d>r----- CONNECTIONS
G
LIGHTNING ARRESTOR
(SINGLE TYPE)
STAKE IN GROUND
OR WATER PI PE IN
CELLAR
TYPICAL LIGHTNING
Q
~} RE~~IVER
---------, ANTENNA
AO GO Ate) d>--
AND
~~ GROUND
~ • CONNECTIONS
~HTNING ARRESTOR
(DUAL TYPE)
CLAMP
~t d.':' STAKE IN GROUND
".:;., OR WATER PIPE
1N
CELLAR
ARRESTOR INSTALLATIONS
-13 -
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FOR
SINGLE- WIRE
ANTENNA
SYSTEM
TO GOOD
EXTERNAL
GROUND
LINK
CLOSED
*INTERNAL CONNECTION
ANTENNA CONNECTIONS FOR SINGLE WIRE
ANTENNA
---.
COAXIAL CAB LE TWIN
LEAD
FOR 50-OHM
FOR DIPOLE
ANTENNA
ANTENNA
CONNECTION
TO GOOD
----. EXTERNAL
GROUND
NOTE: WHEN COAX IS
USED LINK MUST BE
CLOSED BETWEEN A
a G. THIS LINK IS ONLY
OPEN WHEN TWIN LEAD
OR BALANCE ANTENNA
IS EMPLOYED.
I I
\ I
..... _----_../
ANTENNA CONNECTIONS FOR DIPOLE
ANTENNA
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d
h
I. STRIP INSULATION.
2.
CUT AND SPREAD SHIELD.
3. INSERT CABLE INTO PLUG.
CENTER CONDUCTOR THRU
PIN. SOLDER CENTER
CONDUCTOR. CUT OFF
EXCESS.
4. SOLDER SHIELD AROUND
OUTER NECK OF BODY.
CAUTION: DO NOT USE TOO
MUCH HEAT, CENTER
CONDUCTOR INSULATION
MELTS
EASILY!
ATTACHING SHI ELDED CABLE TO PHONO TYPE
CONNECTOR
ASSEMBLY
OF CABLES TO 83-1 SP PLUG USING ADAPTER 83-168 OR 83-185
CUT END OF CABLE EVEN. REMOVE VINYL JACKET 3/4'~
SLIDE COUPLING RING AND ADAPTER ON CABLE.
FAN BRAID SLIGHTLY AND FOLD BACK AS SHOWN.
POSITION ADAPTER TO DIMENSION SHOWN. PRESS
BRAID
DOWN OVER BODY OF ADAPTER AND TRIM TO 3/B~'
'-Jlli-+. L BARE 5/S" OF CONDUCTOR. TIN EXPOSED CENTER CONDUCTOR.
8
SCREW PLUG SUB~ASSEMBLY ON ADAPTER. SOLDER BRAID TO
-=':JI~;jm Cl SHELL THROUGH SOLDER HOLES. USE ENOUGH HEAT TO
CREATE BOND OF BRAID TO SHELL. SOLDER CONDUCTOR TO CONTACT'
I
•
ii- •. ~ .. ;.... .....
[J ;..
" .. ~
FOR FINAL ASSEMBLY, SCREW
SUB-ASSEMBLY.
COUPLING RING ON PLUG
ASSEMBLY OF CABLES TO 83-ISP PLUG
;S- •••••• Mn'MW CUT END OF CABLE EVEN. REMOVE VINYL JACKET 11'8."
~Il.-.I
8 I II
~~ is BARE 5/8 OF CENTER CONDUCTOR. TRIM BRAIDED SHIELD.
_. _: .iiiii'tiJJSLIDE COUPLING RING ON CABLE. TIN EXPOSED CENTER
~
5 CONDUCTOR AND BRAID.
S
SCREW THE PLUG SUB -ASSEMBLY ON CABLE. SOLDER
ASSEMBLY TO BRAID THROUGH SOLDER HOLES. USE ENOUGH
HEAT TO CREATE BOND OF BRAID TO SHELL. SOLDER CENTER
CONDUCTOR TO CONTACT.
iiiiiiiiii.ii·--.:i~l:;,~·~~C FOR FINAL ASSEMBLY SCREW COUPLING RING ON PLUG
. L SUB-ASSEMBLY.
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Using 6 and 2 meter converters with the HQ-180 and "A" series receivers
When building or purchasing a converter for 6 or 2 meters, we recommend
using an IF frequency of 10.0 to 14.0 mc/s. In the "A" series of receivers the
accessory socket may be used for convenience in supplying power to the converter.
Consult the Accessory Socket Connections Diagram for the proper plug wiring"
r--+ B+
VI EW FROM WIRING
SIDE
OF SOCKET, OR
FROM PIN END OF PLUG.
SWITCHED
6.3 VAC
FOR FIL.
L..--_.GROUND
ACCESSORY SOCKET CONNECTIONS
The system socket connections provide for a variety of uses, depending
upon the transmitter system installed. (Compatibility with Hammarlund HX-50
or HX-500 Transmitters included. See their instruction manuals for details).
VIEW FROM WIRING
SIDE
OF SOCKET, OR
6.3 VAC
FROM PIN END OF PLUG.
.-----------. FROM RECEIVER *
~~----. 500.n.
H--. RECEIVER GRID
BLOCK BIAS
MUTING RELAY
j---;,"'------.......
}
CO N TA CTS
* ALWAYS ON IF
RECEIVER 3.2Jl. }
L....-------.SOOn. SPEAKER OR
PLUGGED
INTO
LIVE POWER.
l...---------.GND. LINE CONN.
SYSTEM SOCKET CONNECTIONS
nAil SERIES ONLY
-16 -
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HQ-180A OPERATION
With
the antenna, speaker and any accessories installed, you are ready
to receive transmissions on the amateur bands. These pages are intended to
show you
the operating methods that will permit the Receiver to give you the
best audible signal possible, considering atmospherics and man-made noise.
Three most important reminders:
1. Check the listening aids like the noise limiter and slot
frequency control -- be sure incorrect setting is not
reducing Receiver capability.
2. Always tune the Receiver properly to produce the maxi-
mum signal.
3. Don't forget the antenna trimmer -- it requires a different
setting on each band. This is because antenna impedance
changes with frequency; the trimmer is there to allow for
a maximum match at all frequencies.
Plug the Receiver line cord into a 117 -volt, 60-cycle line (the export
model HQ-180A -E will accommodate 117 or 230 volts, 50 or 60 cycles). Turn
the Receiver on, using the RF gain control and the c Lock timer switch if in-
stalled. Check that all tubes are lit. Note that the high-irequency oscillator
and mixer tube filaments remain heated at all times, (in the HQ-180A series)
if the line cord is left inserted into a source of AC power. Heating of these
tubes eliminate drift that occurs in all oscillator circuits as they heat up.
Tube life is not reduced through continuous operation. In fact, its life is often
extended to many times normal because it is not subjected to the hardships of
physical expansion and contraction due to heating and cooling when power is
applied and removed. If the receiver is not to be used for extended periods
(upwards of 3 days) the line cord should be removed from the power socket.
If the oscillator has not been maintained heated, then allow one hour for the
Receiver to settle down to a steady tuned condition. Readjust tuning as neces-
sary during this period. Do not attempt to calibrate or set the S-meter until
drifting has stopped.
The HQ-180 and "A" Series Receiver is arranged to provide t.he best
reception for AM (voice), for Code (modulated or unmodulated CW), and for
SSB (single sideband) operation. To be sure of the best results and the
clearest reception, read all of the instructions presented here. Set the con-
trols as shown in each illustration for normal operation, and follow the guide-
lines to improve performance and to tune over the bands. Become familiar
with each control and see what each can do for you. Even after you are familiar
in every way with the controls, refer occasionally to these instructions to
check that you are still getting the mo st out of the many features of the HQ-180A.
Finally, your particular location and installation will affect operation;
experiment with control settings to obtain the best results. And consult with
us if there are any problems. The Receiver is for your enjoyment use it
correctly and it will give you years of service. '
-17 -
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The Carrier Level S-meter has been adjusted at the factory for correct
and calibrated operation, however, two zero adjustments should be checked and
reset if necessary; one is mechanical, the other, electrical.
L With
the Receiver turned off, adjust the meter pointer screw
on the front face of the meter to set the needle exactly over
the zero mark on the scale.
Turn on the Receiver; be sure to allow a 1/2 hour warm-up
before proceeding further. £EJt the HQ-180A to "Receive",
and set the RF Gain control fully counterclockwise, without
actually turning the set off.
3, Now
adjust the meter zero control at the rear of the Receiver
chassis again for zero on the meter. A small screwdriver
inserted through the chassis is required for this setting. Do
NOT adjust the meter sensitivity, this requires a special
technique and an in pat signal generator, not normally avail-
able for home use. Check carefully with the rear of chassis
illustration to be sure of the location of the meter zero adjust.
HOW TO USE THE BAND SPREAD DIAL
The main dial is provided with markers, just below the scales at 4.04,
7.3,14.425,21.6 and 29.7 mcs, to establish points for the approximate set-
tings of the main dial when using the band spread scales.
Please remember that we do not claim frequency meter accuracy; also
that the high frequency markers, mentioned above, are approximate settings
of the main dial to be used in setting up the amateur scales of the band spread
dial.
Set the band spread dial at the 100 kcs point at, or nearest to, the high
frequency end of the desired amateur band. The main dial should then be
carefully adjusted, close to the high frequency band edge marker, to obtain
zero beat with the 100 kcs calibrator. Care must be taken that the proper
100 kcs point is employed in order to prevent setting the main dial 100 kcs
higher or lower than the amateur band. Next turn the band spread dial to the
100 kcs marker nearest the desired operating frequency. It may be found that
this 100 kcs marker is slightly off the exact dial marker. The dial indicator
is set to the exact 100 kcs marker, with the small knob to the right of the
band spread dial.
If it Is desired to use the band spread dial for other, limited frequency
ranges than those for which scales are provided, set the band spread dial at
the 100 marker of 0 to 100 arbitrary scale and adjust the main dial for zero
beat at the highest 100 kcs marker of the desired range. The frequency
coverage of the band spread, under this condition, can be determined by
counting the 100 kcs intervals covered and by noting the arbitrary scale
readings at which they occur, the wanted frequencies can be identified and
logged for future use.
- 18 -
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