Hammarlund HQ-180A Series Technical Description, Test And Operating Instructions Download

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Summary of Contents for HQ-180A Series

Page 1: ...EstablIShed 1910 HQ 1S0A COMMUNICATIONS RECEIVER TECHNICAL DESCRIPTION TEST AND OPERATING INSTRUCTIONS EAr HRmmRRLUND ...

Page 2: ...70 THE HRmmRRLUND MANUFACTURING COMPANY INCORPORATED A Subsidiary of ELECTRONIC ASSISTANCE CORPORATION 73 88 HAMMARLUND DRIVE MARS HILL NORTH CAROLINA 28754 EstablIshed 1910 704 689 5411 I TWX 510 9353553 CABLE SUPERPRO NEW YORK INDUSTRIAL AMA TEUR COMMERCIAL AND MILITARY COMMUNICA TlONS EQUIPMENT I VARIABLE AIR CAPACITORS ...

Page 3: ... Dipole Antenna and Con 2 2 13 RF Gain and AC Switch 15 nections 9 2 2 14 Bandswitch 15 FIGURE 4 Accessory and System 2 2 15 AF Gain 15 Socket Connections 10 2 2 16 Main Tuning Knob 16 FIGURE 5 Suggested Interconnections 2 2 17 SEND RECEIVE CAL 16 EX 50 HQ 180AX 11 2 2 18 Earphone Jack 16 FIGURE 6 Speaker connections 12 2 2 19 Antenna 16 FIGURE 7 Front View of Receiver 17 2 2 20 NOis e Limiter 16 ...

Page 4: ...d delay OFF posi tion included ADJUSTABLE SELECTIVITY 6 DB bandwidths of 5 1 2 3 kHz SELECTABLE SIDEBANDS Upper Lower and both Both position yields 2X selectivity SENSITIVITY AM 1 5 uV or less produces 10 1 signal to noise ratio CW SSB 7 uV or less produces 10 1 signal to noise ratio ANTENNA INPUT 50 to 600 ohms balanced or unbalanced ANTENNA COMPENSATOR Permits compensation for loading effects of...

Page 5: ...OA2 Crystal Osc AX Models 6CW4 SEMICONDUCTOR COMPLE MENT Two Diodes CER 72 C 800 PIV Amp s METER Calibrated 1 to 9 in 6 DB steps Approx also includes a DB scale from S 9 to 40 Meter deflects on all signals NOISE LIMITER Adjustable series type provides both positive and negative clipping POWER SUPPLy 115 230 volts 50 60 Hz 120 Watts power consumption FRONT PANEL EQUIPMENT Main Tuning Slot Frequency...

Page 6: ... HQ 180 AX Universal Model of the HQ 180 A 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 A 3 kHz vernier tuning con trol permits compensation for minor frequency variations of the crystals 24 HOUR CLOCK TIMER ...

Page 7: ...eiving only and not as part of a system with interconnections to an associated transmitter there are only a few required connections These connections are easily accessible at the rear of the receiver and their design per mits permanent connections to be made in a neat manner Figure 1 illustrates the connection points at the rear of the receiver 1 2 1 ANTENNA CONNECTIONS The HQ 180A is designed to...

Page 8: ...a A good ground will generally aid in reception and reduce stray line hum Reversal of polarity of the power cord plug may possibly further reduce line hum in some locations To obtain the best results from the receiver the antenna that most nearly suits your needs should be selected The illustrations shown in Figures 2 and 3 are typical antenna installations SPKR f USE ANT o METER ADJ 3 2 OHMS o fl...

Page 9: ...SINGLE WIRE ANTENNA FOR SINGLE WIRE ANTENNA SYSTEM TO GOOD l C EXTERNAL GROUND LINK CLOSED o 0 A A G 0 W0 L __ I l J INTERNAL CONNECTION ANTENNA CONNECTIONS FOR SINGLE WIRE ANTENNA FIG 2 8 ...

Page 10: ...HM TWIN LEAD USE 300 OHM 1 2 WAVE LENGTH TWIN LEAD FOR 468 FOLDED DIPOLE FREQ MCS COAX PLUG DIPOLE LUGS 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 I i l i A G CLOSED BETWEEN A 0 0 t l a G THIS LINK IS ONLY W Y OPEN WHEN TWI N LEAD 0 0 I OR BALANCE ANTENNA I I IS EMPLOYED _ _ ANTENNA CONNECTIONS FOR D...

Page 11: ...NG SIDE OF SOCKET OR FROM PIN END OF PLUG SWITCHED 6 3 VAC FOR FIL GROUND ACCESSORY SOCKET CONNECTIONS The system socket connections provide for a variety of uses depend ing upon the transmitter system installed Compatibility with Hammarlund HX 50 tion manuals for or HX 500 details Transmitters included See their instruc VIEW FROM WIRING SIDE OF SOCKET OR FROM PIN END OF PLUG 6 3 VAC FROM RECEIVER...

Page 12: ...Jj _ 3 2n _WH I _ _ 5 9 0 1 RED _____ GGIROVND BLK _ 63V BRN NOTES I HOOK UP SHOWN IS USING GRID BLOCK BIAS TO THE HQ 180 A 2 IF RELAY SWITCHING IS DESIRED 4 WHEN USING VOx CONTROL OF THE HX 50 TRANSMITTER a DISCONNECT GRID 8LOCK BIAS GREEN LEAD FROM PIN 5 OF TBIOI PIN NO I OF THE HQ 180A OR HQi80AX RECEIVERS SYSTEM b WI RE ORANGE LEAD TO PIN 7 AND YELLOW LEAD TO PIN 6 SOCKET SHOULD BE CONNECTED T...

Page 13: ...y be employed These may be any of the popular impedances 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 permanently connect these to the 500 ohm line output terminals...

Page 14: ...rds rear and set handsj to set AUTO control push knob towards front and set the small red hand Once turned on by the auto timer the set must be turned off by the clock knob before resetting 2 2 2 MAIN TUNING DIAL INDEX 2 The main tuning dial is used to indicate the received frequency It is only accurate when the bandspread dial is set at 100 on the logging scale The dial contains a separate scale ...

Page 15: ... 5 it will not have any effect on the received signal If an interfering signal were to be heard at 2 kHz the slot frequency knob should be moved to that point and the interfering signal would then be reduced by 40 DB or mare As the slot approaches the center of the passband it will begin to effect the desired signal until the desired signal is reduced to uselessness Judicious use of this control i...

Page 16: ...in conjunction with the selectivity control INDEX 10 as explained in paragraph 2 2 10 above 2 2 12 BANDSPREAD KNOB INDEX 12 This control drives the bandspread dial INDEX 4 which drives the bandspread capacitor as explained in 2 2 4 2 2 13 RF GAIN AND AC SWITCH INDEX 13 At the extreme counterclockwise position this control operates the AC ON OFF switch As the control is advanced in the clock wise d...

Page 17: ...rted the jack opens the speaker circuit If both a speaker and earphones are desired a pair of high impedance ear phones may be connected across the 500 ohm output on the rear of the receiver Not available on older HQ 180 Receivers 2 2 19 ANTENNA INDEX 19 The antenna control is connected across the antenna coils and serves to peak the coil in use for best match to the antenna It has a range of 50 t...

Page 18: ...NING Control 3 S I Teter 16 10 SELECT Control SEND RECEIVE CAL Swi tch Band Spread Dial SIDE BANDS Control 1 7 4 11 18 Earphone Jack 5 Dla1 Calibration BAND SPREAD ContrOl SLOT FREQ Control 12 AC SWitch 19 ANTE NA Control 6 BFO Control 13 RP Gain 20 NOISE LIMITER Control 7 14 TUNING RANGE ContrOl 21 AVe SWl tch FRONT VIEW OF RECEIVER FIG 7 17 ...

Page 19: ...itch to the band desired set the AF gain to a comfortable listening level peak the received signal with the antenna control and set the noise limiter to a point just below that which reduces the audio level Use the S meter to indicate the maximum signal when tuning the main tuning dial and peaking the antenna 2 4 TUNING SSB SIGNALS When tuning SSB signals the controls should be set or manipulated ...

Page 20: ...imum sig nal when tuning the main tuning dial and peaking the antenna 2 5 TUNING CW SIGNALS When tuning cw signals the controls should be set or manipulated as described below 2 2 1 clock Timer On 2 2 6 Slot Frequency 5 2 2 7 BFO o 2 2 8 Vernier Tuning a 2 2 9 AM SSB CW cw 2 2 10 Selectivity 1 2 2 11 Sideband Both 2 2 15 AF Gain MAX 2 2 17 SEND RECEIVE CAL RECEIVE 2 2 21 AVC Slow Set the main tuni...

Page 21: ...practice will soon lead you to the proper band at the proper time of day but until you have become familiar with the routine here is a listing that will help you to get started INTERNATION SHORT WAVE BROADCAST BANDS Meters Frequency Range 49 5950 6200 kHz 41 7100 7300 kHz 31 9200 9700 kHz 25 11700 11975 kHz 19 15100 15450 kHz 16 17700 17900 kHZ 13 21450 21750 kHz WHEN TO LISTEN FROM THE UNITED STA...

Page 22: ...r and better from 1969 on 2 6 2 HAM RADIO Various segments of the radio spectrum have been set aside for use by radio amateurs or HAMS who are licensed by the Federal Communi cations Commission to operate their own radio transmitters Commun icating across thousands of miles of land and sea and international borders the chatter of thousands of hams around the world fills the air at all hours of the...

Page 23: ... FREQ kHZ CH FREQ kHZ CH FREQ kHz 1 26965 9 27065 17 27165 2 26975 10 27075 18 27175 3 26985 11 27085 19 27185 4 27005 12 27105 20 27205 5 27015 13 27115 21 27215 6 27025 14 27125 22 27225 7 27035 15 27135 23 27255 8 27055 16 27155 2 6 4 STANDARD FREQUENCY AND PROPAGATION REPORTS Stations broadcasting standard frequencies accurate time signals and propagation reports are listed below CALL FREQUENC...

Page 24: ...pected U Unstable conditions N NO warning The code letter above will be followed by a number which gives the quality of the report 1 Impossible 6 Fair to Good 2 Very poor 7 Good 3 Poor 8 Very Good 4 Fair to Poor 9 Excellent 5 Fair 23 ...

Page 25: ...r is employed T 22 in the schematic diagram This transformer provides 24 hour a day oper ation of the heaters of the high frequency oscillator 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 periods upwards of 3 days the line cord should be removed from the ...

Page 26: ...illator assembly which is factory installed in the panel space provided for the 24 hour clock timer The knob allows selection of normal variable frequency tuning or any one 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 frequencies The remaining five crystals are mounted behind the fron...

Page 27: ...mpensating for differing antenna characteris tics at differing frequencies is located across the secondary of the antenna transformer The calibration oscillator turned on in the calibrate position applies its signal to the RF amplifier This oscillator is a crystal controlled type at 100 kHz develop ing a very large number of 100 kHz harmonics to cover all of the bands in the receiver To control th...

Page 28: ...quency tuning occurs in the grids of the mixer and of the oscillator The arrangement of heterodyning used in this receiver is listed in the accompanying chart The stability of the oscil lator circuit a must for accurate and repeatable tuning is main tained by using a separate tube and keeping the heater supply on at all times minimizing drift tendencies In the HQ 180 A and HQ 180 AX Receivers the ...

Page 29: ...R 455k HZ 455k HZ 60kHZ 60kHZ IF AMP 455k HZ AMP SLOT 2nd IF IF AYC AM NOISE GATE I F FILTER CONY AMP AMP DETECTOR LIMITER 395kHZ ose 3035 3kHZ kHZ VERNIER TUNING c J t XTAL osc 4 TO YFO MIXER CONY OSC METER AMP RELAY II POSITION FIXED 6C4 OSC FREQ XTAL RECTIFIER YFO L _ O Sj C _ J SILICON RECTIFIER 5U4G IN A SERIES lOOk HZ XTAL CAL NUYISTOR CRYSTAL CONTROLLED FIXED FREQUENCY MODEL HQ 180AX 28 FtG...

Page 30: ...o the third mixer it is passed through the slot circuit This circuit is designed to provide a narrow section of frequency rejection capable of being set precisely on an interfering signal The slot depth control permits its depth or amount of rejection to be set as required for best results The diagrams show the characteristics and the capabilities of this circuit BAND FREQUENCIES IN kHz 1st 1st 2n...

Page 31: ...t I I_ 1 10 10 When Sidebands Sw I I I is set to Lower I I 20 20 a mirror image of D I I 1 30 the Upper Sideband 30 I appears in the II 40 Lower Sideband 40 I I Db Db V 1 1 50 50 V V 60 V I 60 J r 70 l I V A 70 1 I T 80 80 I I I Selectivity Sw Sidebands Sw Selectivity Sw Sidebands Sw A 5 kHZ E I kHZ UPPER UPPE B I kHZ BOTH F 2 kHZ UPPER C 2 kHZ BOTH G 3 UPPER HZI D kHZ BOTH I I 1 J I I I 765432101...

Page 32: ...t See the simplified schematic of the detector BFO and noise limiter circuits In the AM position the resulting audio is passed through the noise limi ter tube VIO and on to the audio gain control In the CW position v9 acts as a product detector and the audio is developed from the beat between the incoming 60 kHz and the output of the BFO at a frequency that is at or near 60 kHz depending on the se...

Page 33: ...OL V8C AM DETECTOR R42 C44 X B I I I I TO 3rd l l OSC i GRID I e R43 OFF R46 R44 B NOISE LIMITER AND C48 C49 C43 I I I I CLOCKWISE CONTROL SWITCH R78 R45 I I I 6 B V9 PRODUCT DETECTOR R37 I 2 CI26 C35 I I Ii I IU IT28 I I C129L _J BFO R40 r c 61 1 CI25 L __ _I _ 1 r T l i I CI27 DETECTOR I BFO 8 NOISE LIMITER CIRCUITS FIG IO ...

Page 34: ...his point maximum clipping is occurring with out reducing the wanted signal The noise limiter is capable of operation on any type of signal but it should be noted that less noise and interference can often be obtained by reducing the receiver bandwidth as well Automatic volume control voltages are developed from the two circuits illustrated RF detection takes place through both V8B and the diode s...

Page 35: ...n weak signals narrows the audio response to improve signal selectivity An improved signal to noise ratio results A further advantage is the critical damping of the speaker for elimination of sp aker resonance effects Speech reception is improved and receiver out put noise is reduced The receiver power supply is arranged to permit the 1st oscilla tor and mixer to remain heated even when the rest o...

Page 36: ...R21 2 Vl3B METER AMP I R20 _cZERO ADJ 7 CI45 R83 CI31 Re5 Raa R22 1 R91 Re9 ________ 1 VI5 1ST AUDIO AMP a DETECTOR fOR Ave R99 R92 R93 CI46 GROUND CONNECTED IN OFF DELAYED Ave TO RF AMP Ave TO 2 ND IF AMP 3 RD MIXER a I ST 60kHZ If AMP ONLY Ave 8 s METER CIRCUITS c FI G II ...

Page 37: ...nd mixer and the 2nd IF amplifier is removed muting the receiver Further or alternate muting can be applied through the system socket from the transmitter 4 N t a IJJ J 0 0 0 0 ft Q 2 0 2 4 6 8 0 12 14 16 18 20 tJ Ii 4 1 I J If II r _ V 1000 B A AUDIO CHARACTERISTIC A MAX AF GAIN CONTROL B AF GAIN APPROX 25 OF ROTATION FROM MIN SIMU LATING AVERAGE SETTING A INPUT I0V ACROSS AF GAIN CONTROL CONSTAN...

Page 38: ...Reo AUTO RESPONSE FEEDBACK LOOP AUDIO I I AF GAIN R79 VIS 7 7 1 VI6 15 T29 I 10 3 2 n 500n 2 R77 PHONES GND AUTO RESPONSE CIRCUIT FIG 13 ...

Page 39: ...hat this section is provided A communications receiver of this type contains several special circuits not normally included in the home radio Examples of such circuits are the BFa beat frequency oscillator the slot triple conversion delayed Ave automatic volume control etc 4 3 GENERAL This section will provide the instructions for the correct servi cing of the receiver While no particular unusual ...

Page 40: ...f the chassis from the cabinet and for the disassembly of the front panel are presented here Follow the instruction steps with care and there will be no trouble identifying and replacing all of the parts Note par ticularly the knob and dial alignment procedures 4 4 REMOVING RECEIVER CHASSIS FROM THE CABINET 1 Disconnect all wires and cables at the rear of the chassis 2 Tip the cabinet up from the ...

Page 41: ...13 PHilLIPS OVAl DSCREWS i _ I I PANEL I I CLIP d I DETAIL t PANEL TOP FRONr CLIPS I IINSERT PRONGS UP j I I FRONT BACK HEX HEAD o SLOTTED SCREWSW TH LOCK a FLAT WASHERS HARDWARE TO FASTEN CHASSIS TO 40 CABINET ...

Page 42: ...the bottom front of the cabinet DO not tighten yet 4 Tighten the three screws in the rear first then tighten the screw on the bottom 5 Tighten the two Phillips head screws in the top of the cabi net 4 6 REMOVAL OF THE FRONT PANEL FROM THE CHASSIS Refer to the diagrams for the locations and identification of all parts 1 Remove all knobs except those of the clock and dial calibra tion Turn all capac...

Page 43: ... STEP 1 I IBARl ILARG rl I POINTER ROUND I I SHAPE REMOVE ALL KNOBS EXCEPT CLOCK AND DIAL CALIBRATION NUT AND FLAT REMOVE NUTS SCREWS AND WASHERS STEP 2 WASHER INDICATED SET SCREW OF KNOBS TO LINE UP WITH FLATS OF SHAFTS CAUTION TO PREVENT DAMAGE TO CAPACITOR PLATES MAKE SURE THEY ARE FULLY MESHED 42 ...

Page 44: ... s METER WIRES UNSOLDER REMOVE AND UNSOLDER AS INDICATED FOR CONVENIENCE PULL OFF OTHER TWO LAMPHOLDERS Q Q NOT REMOVE NUTS FROM METER THESE ARE INTERNAL MOUNTING STUDS PHILLIPS I SCREW AND I I PHILLIPS NUT WITH I SCREW AND CAPTIVE NUT WITH LOCKWASHER STEP 4 CAPTIVE I LOCKWASHER PHILLIPS SCREW AND L BRACKET REMOVE SCREWS NUTS AND BRACKET INDICATED ICAUTION HOLD PANEL TO PREVENT FALLING I II 43 ...

Page 45: ...ward at the same time guiding the left dial out of the tuning drive discs LOOSEN TWO ALLEN SET SCREWS IN EACH rroPl DIAL W 2l O O DrAL REMOVE COMPLETE DIAL ASSEMBLY AS ONE PIECE PULL FORWARD AND OUT OF DRIVE STEP 5 6 Replace the two dial assemblies on their shafts inserting the left dial into the tuning drive discs Make sure that the tuning capacitor plates are fUlly meshed then turn the dials so ...

Page 46: ...S REMOVED SET CAPACITOR PLATES OUT OF MESH FOR IN STALLATION OF THIS KNOB STEP 10 SET CONTROLS COUNTER SET CAPACITOR PLATES CLOCKWISE SWITCH OFF IF IN MESH PUSH ON POINTER SO EQUI PPED THEN KNOB KNOB ALIGNMENT POSITIONS REMAINING SHAFTS HAVE FLATS IF KNOB ALIGNMENT IS REQUIRED REPLACING POI NTERS AND KNOBS 45 ...

Page 47: ...not to scratch the panel when tightening the nuts and remember to line up the flats of the two controls indicated in the step 2 illustration After step 9 is completed check that the dials and the dial cali bration system operate smoothly and without interference If necessary loosen the front panel screws of step 4 and readjust panel positioning to obtain proper dial operation 10 Replace the two re...

Page 48: ...he right dial but using 100 on the logging scale this time This completes the dial calibration procedure Check on other bands if dial calibration is far out or not possible to be attained RF alignment will have to be undertaken 4 7 ALIGNMENT PROCEDURE This receiver has been carefully aligned at the factory and should never require any more than a touch up to retain the peak of its performance If a...

Page 49: ...o mark on the scale Connect the speaker to the receiver plug the set into a source of power and turn it on BEFORE ALIGNMENT THE RECEIVER MUST BE ALLOWED TO WARM UP FOR AT LEAST A HALF HOUR This is to assure frequency stability KNOB NORMAL FUNCTION POSITION Band Selector 7 85 15 35 MHz band Bandspread Tuning Dial arbitrary 100 AM SSB CW Selec tor AM Sideband Selector U Selectivity Selector 5 kHz Sl...

Page 50: ...e alignment progresses Except where noted in the diagrams the coil slugs are set from the top of the can Be careful that you are actually turning the proper slug it is sometimes easy to be adjusting the wrong one or even to be turning both at once if they happen to be close together in side the coil 4 8 IF ALIGNMENT 1 Connect the VTVM to the junction of L8 and C44 and chassis ground Connect the si...

Page 51: ...ISE CENTER 0 SET DIAL CALIBRATION TO CENTER MARK AM CENTER 0 TO BE ADJUSTED 100 ON AS INSTRUCTED LOG SCALE SET PLATES TO SET TO 7 85 15 35 MCS 1 2 MESH BAND INITIALLY CONTROL SETTING AT START OF ALIGNMENT FIG 14 50 ...

Page 52: ...a bracket just behind the front panel to the center of its range Adjust L3 for minimum meter reading After a minimum reading is obtained adjust the slot depth control to further minimize the reading After adjusting the slot depth control readjust L3 for mini mum reading leaving the slot depth control as previously set After alignment return the slot frequency control to 5 on the front panel markin...

Page 53: ...the bandspread dial is set at 100 on the logging scale Adjust the top slug in T23 the top slug of T19 and the top slug of T12 for maximum negative reading of the VTVM Remember to adjust the generator output and RF gain control to maintain VTVM reading of approximately 5 volts Now adjust the top slug of Tl for maximum negative reading on the VTVM Set the main tuning dial to 1 0 MHz and the generato...

Page 54: ...he VTVM Repeat the two frequency adjustments until no further improvement can be noted Finish with the high freq uency adjustments Band Switch to 2 05 4 04 MHz Dial and Generator to 2 1 MHz Adjust T24 T14 and top of T20 for maximum negative reading on the VTVM Dial and Generator to 4 0 MHz Adjust C146 C55 and antenna compensator for maximum negative reading on the VTVM Repeat the two frequency adj...

Page 55: ...djustments until no further improvement can be noted Finish with the high frequency adjustments 4 10 s METER ADJUSTMENT 1 Turn receiver off and if necessary adjust the mechanical zero of pointer with a small bladed screw driver 2 Turn receiver on and allow 1 2 hour warm up 3 Set Function Switch to RECEIVE and turn sensitivity RF control counterclockwise 4 Adjust meter zero adjust potentiometer R2 ...

Page 56: ...RF TRIMMER ADJUSTMENTS MCS C57 C58 C55 C54 15 0 30 0 i 4 0 2 0 T5 55 I CS ij55 I CS 13 ij55 KCS C79 3035 KCS J n BOTTOM VIEW OF RECEIVER FIG 15 ...

Page 57: ... COIL ADJUSTMENTS Tl0 COIL FREQ LOCATION MCS 121 TOP 7 9 BOT 15 7 TOP I2 1 I T20 BOT 4 0 TOP ONLY Tl9 TOP 60 BOT 1 1 HF OSC COIL ADJUSTMENTS MCS T27 115 7 126 I 79 T25 I 40 124 2 1 123 TOP 60 BOT I I I TI TOP 8 BOTTOM FI G 16 TOP VIEW OF RECEIVER ...

Page 58: ...oo l Io 0 8 I FI GNO SENS ZERO JJ G 3 2 a 500A SYSTEM SOC PT 241602 00009 HAMMARL MFG CO MODEL NO HQ 180 AX MARS HILL N C GATE V20 I v J 6BA6 o o 0 O 6CW4 CRYSTA D I BCJ Y HF D MIXER OSC osc IGri LIM 455kHh 68E6 6C4 IF V6AL5 68A6 D D IstAF QDELAYED DO Ave D tV5 2nd CONY ODD GAV6 68E6 IC RFAMPL DO 68Z6 POWER OUTPUT 6AQ5 DOD 60kHZQ IF 68A6 DDD o DO REG OA2 60kHZ BFa IF METER G8AG 12AU7 CAL PROD 68Z6...

Page 59: ... 0 0 6 3 AC 2 0 84 0 V 6 IF Amp 6BA6 0 0 6 3 AC 0 240 83 1 0 V 7 IF Amp 6BA6 0 0 6 3 AC 0 230 82 1 0 V 8 DET Ave 6BV8 5 0 235 0 24 0 0 4 V 9 Prod Det 12AU7 220 SSB 0 7 0 SSB 6 3 AC 6 3 AC 100 SSB 0 7 0 SSB 0 V 10 Limiter 6AL5 35 off 24 max 30 Offl o max 0 6 3 AC 36 21 1 fOf max 0 30 Of j o max V 11 Cal 6BZ6 60 cal approx 9 0 cal 6 3 AC 0 7 cal 88 cal 9 0 cal V 12 HF Ose 6C4 130 6 3 AC 0 130 6 0 0 ...

Page 60: ...K 8 0 22K 44K 1 2 MEG V 6 IF Amp 6BA6 1 47 MEG 0 0 19K 61K 68 V 7 IF Amp 6EA6 470K 0 _ 0 20K 60K 68 V 8 Det 6BV8 AVC 560 17 30K 0 47K 70 4 T V 9 Prod Det 12AU7 INF 20K SSB 470K 820 551 lOOK 820 0 V 10 Limiter 6AL5 210K 1 4 MEG 200K LIM ON 0 220K 0 1 5 MEG 470K LIM ON V n Cal 6BZ6 470K 4 7K 0 INF SOOK cn INF nOK CAL 4 7K V 12 HF Osc 6c4 24K 0 24K __ lOOK 27 _ V 13 BFO Meter 12AU7 17K 0 lK INF 20K S...

Page 61: ...g 1 V201 8 6CW4 I I I I I I I I I I I SEE d 1 1 1 r1 r1 r1 Ek lliIT1 NOTE 1 1 I l 1 r 1 r 1 r T 1 I I I I I I I I I I I C201 I CRYSTAL USED DEPENDS ON BAND w w a FREQ DESIRED 3 50pf 2 PARTS SHOWN INSIDE DOTTED AREA ARE LOCATED ON MAIN CHASSIS R201 L C203 L101 OF RECEIVER lOOK TIOOpf 2 5MH 3 ALL RESISTORS ARE 2 W 10 UNLESS OTHERWISE SPECIFIED S201 SHOWN IN VFO POSITION FREQUENCY CONTROL UNIT DIAGRA...

Page 62: ...1 01005 Capacitor Fixed Ceramic 300 W V D C 85 Disc 04 uf 600 W V D C C66 1519 01 00002 Capacitor Fixed Silver c22 27 1509 01 01014 capacitor Fixed Ceramic Our Mica oM 15 85 pf Disc 01 uf 10 1000 500 W V D C W V D C C67 1519 02 00034 capacitor Fixed Silver C23 1519 02 00022 Capacitor Fixed Silver Dur Mica DM 15 150 pf Dur Mica DM 15 15 pf 300 W V D C 300 W V D C C68 80 1519 01 00007 Capacitor Fixe...

Page 63: ...019 Capacitor Fixed Ceramic R5 14 BO 4703 02 00429 Resistor 180 1 1 2 W 5 Disc 001 uf 500W V D C R6 4735 01 16000 Resistor Variable 1 5K C129 9411 73 00009 Capacitor Variable BFO dual with R15 and S3 100 pf R7 42 49 4703 01 00352 Resistor 47K 1 2 1 1 10 Cl32 1509 01 01003 Capacitor Fixed Ceramic 65 70 72 Disc 005 ufo 1000 WoV D C 73 75 84 C134 1519 01 00024 Capacitor Fixed Silver 100 Dur Mica DM 1...

Page 64: ......

Page 65: ... I I NOTES I 1 I i I l II I l I I 64 ...

Page 66: ... M 23 modification it normally would not be used for interconnecting the HQ 180A with a trans mitter unless special cable configurations are used Page 13 Delete paragraph 2 2 3 S Meter Index 3 and add the following e e Meter lIndex_ 3 __ The meter is used to indicate a change in signal strength with the M 23 cable assembly connected to a variable DC Slide Back voltage source and a 1 0 microvolt si...

Page 67: ...HZ signal to the antenna input By monitoring either the Ave as in the IF alignment or by listening tune L901 for minimum recep tion of the 455 kHZ signal Page 54 Delete paragraph 4 10 s Meter Adjustment Add new paragraph 4 o_ Meter Adiu tment With the receiver turned off the pointer must indicate 0 on the meter scale Turn the receiver on and allow hour warm up Apply a 1 0 microvolt signal to the a...

Page 68: ...1 1803 01 00106 Coil IF rejection tuning 5 Change meter Ml from 2902 01 00003 meter S carrier level to SKA 0186 meter Simpson 4306 modified Page 63 1 Change resistor R53 from 4714 01 01002 resistor 4 10 watts 10 to 4714 01 01001 resistor 3 10 watts 10 2 Add resistor R901 after RIll R901 4703 02 00416 Resistor 5 5 watt 3 Add resistor R902 after R901 R902 4703 01 00356 Resistor 100 10 watt 4 Add M 2...

Page 69: ...n the HQ 180A manual should be changed to agree with the sketches below if the receiver was supplied to the United States Navy under Contract N00123 70 C Ol14 and contains U s Navy M 23 modification LEGEND Normal Wiring wiring Removed _ _ Wiring Added J3 New Type N TO S2A Front C162 AH L901 e A t e901 1100pf To S2A Rear R20 ADDF NnI NO_ 9001 1S 00006 4 of 5 ...

Page 70: ...J1 I T29 Secondary 500 I I I I I C141 at speaker terminal 0 zr I board I 5 0 I New MI M900 System Socket Pin 6 V 8 Blue C902 6BV8 I 01 uF PI M 23 Cable White NOTE Change R53 from 4K to 3K 5 of 5 ADDENDUM NO 9001 15 00006 ...

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Page 73: ...tration Card by the Comapny No equipment snaIl be returned to the factory for repairs under warranty unless written authorization is obtained from the Company and the equipment is shipped prepaid by the owner he Company maintains Authorized Service Stations names and locations of which will be sent upon request of the owner ith regard to F Corr unications equip ent the perfo ance of eT ip ent a d ...

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Hammarlund HQ-180A Series, Technical Description, Test And Operating Instructions

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