Realistic DX-440 User's Manual
Contents
1. Cat No 20 221A REALISTIC CONTENTS Introduction 3 Features 4 Control Locations 5 Choosing a Power Supply 7 Preliminary Settings 10 Tuning the Radio 13 Clock Radio Operation 23 Special Tuning Techniques and Controls 26 Special SSB CW Reception Techniques 28 Using the Shoulder Strap 33 Choosing an Antenna System Grounding Band Allocation The Shortwave Hooby Listening Notes Frequency Conversion Country Log Troubleshooting Guide Care and Maintenance Specifications INTRODUCTION You now have the world at your finger tips Just press the buttons of your DX 440 to listen to a variety of voices from around the world In addition to your local AM and FM broadcast stations you can now enjoy broadcasts from London Tokyo Paris Berlin and Moscow This entertainment grade general pur pose communications receiver covers an extremely wide range of frequencies that also include shortwave and special services such as marine and navigation If you understand international Morse code you can listen in and decode a wide variety of transmissions The radio uses the latest solid state technology to provide programming a large liquid crystal display LCD and a host of other convenient features Because this product is so versatile please take a few minutes to review the material in this manual before you proceed You ll enjoy the radio2. Your DX 440 is an example of superior design and craftsmanship The following suggestions will help you care for the DX 440 so that you can enjoy it for years Keep the product dry If it does get wet wipe it dry immediately Liquids might contain minerals that can corrode the electronic circuits Use and store the product only in nor mal temperature environments High temperatures can shorten the life of electronic devices damage batteries and distort or melt plastic parts Handle the product gently and careful ly Dropping it can damage circuit boards and cases and can cause the product to work improperly Keep the product away from dust and dirt which can cause premature wear of parts 48 Wipe the product with a dampened cloth occasionally to keep it looking new Do not use harsh chemicals clean ing solvents or strong detergents to clean the product Use only fresh batteries of the recom mended size and type Always remove old or weak batteries They can leak chemicals that destroy electronic cir cuits Modifying or tampering with the pro duct s internal components can cause a malfunction and might invalidate the product s warranty If your product is not performing as it should take it to your local Radio Shack store Our per sonnel can assist you and arrange for service if needed 49 SPECIFICATIONS Semi conductors Circuit FM AM LW MW SW Freguency
3. FM 87 5 108 MHz Normal FM broadcasts indicated AM 150 29999 kHz Entire AM Band FREQUENCY ANTENNA RANGE LW 150 281 kHz Longwave 520 1620 kHz Internal Rotate radio MW 520 1620 kHz Normal AM broadcasts for best reception SW 2300 26100 kHz Shortwave in 12 sub bands Note Each time you select SW the respond to the wavelengths of each Ney z radio steps through 12 sub bands each band Refer to The Shortwave Hobby 150 281 kHz Internal Rotate radio _ band covering as little as 100 kHz to as section for additional information for best reception much as 500 kHz The sub bands cor 1 Press the POWER button The POWER indicator lights The display shows the last band and frequency you selected 87 5 108 MHz Telescopic Extend fully Swivel for best reception MINI LIIATI i 1 IMAX VOLUME 2 Press the band button of your choice The display shows the band you selected and a random freguency within that band FM AM LW MW SW AM SW 2300 26100 kHz Telescopic Extend fully Do not swivel 12 13 You can select a freguency using four tuning methods 3 Press 7 3 0 5 As you press 3 each button the LCD shows the number Direct Tuning 5 fe B Manual Tuning 7 yar 9 e Scan Tuning ogee gt EXECUTE Memory Tuning T 4 Press the EKECUTE button within DIRECT TUNING five seconds The display shows the freguency and
4. refer red to as CW continuous wave set the BFO switch to IN position If you en counter too much noise as you tune set the AM NARROW WIDE switch to NARROW position Te Mey MONO STEREO BFO LOCK oe ee WIDE NARROW OUT IN OUT IN tam T USING HEADPHONES While not a control you might consider using headphones to obtain the best reception Many stations broadcast marginal signals Only headphones can capture the subtle difference between the signal from such stations and the surrounding noise often encountered at night Be sure that the headphones terminate in a 1 8 inch plug Insert the plug into the PHONES jack on the side of the radio When you plug the head phones in you silence the speaker Because the radio can receive stereo FM when you listen to FM stereo broadcasts be sure your headphones are designed for stereo operation so that you can obtain the full benefit of this feature FM MONO STEREO BFO LOCK os L ee om WIDE NARROW OUT IN OUT IN Lam USING THE LOCK CONTROL Use this switch to prevent unauthorized use of the radio or to ensure that any station you might be monitoring remains tuned in When you move the LOCK switch to the IN position you disable the POWER button and the tuning controls If the radio is on when you use the LOCK switch you cannot turn off the radio or change the current frequency To release the LOCK function set LOCK switch to out position FM
5. wong shee BFO LOCK oe on ee WIDE NARROW OUT IN OUT IN AM 27 SPECIAL SSB CW RECEPTION TECHNIQUES Many stations transmit unmodulated telegraph transmissions in the shortwave band To receive these special Morse code characters the radio uses a special circuit a beat frequency oscill ator to modify the transmitted signal so that you can hear it This particular type of telegraph transmission is called con tinuous wave CW transmission FM ubwo shen BFO LOCK TR WiDE NARROW OUT gt f IN Lam TO RECIEVE CW 1 Turn on the radio Many stations transmit voice signals with a suppressed carrier in the single side band SSB part of the radio trans mission spectrum that lies to the side of the primary frequency signal Amat eurs tend who transmit voice below 10 MHz use the lower side band LSB Above 10 MHz they use the upper side band USB Commercial utility stations generally use the USB A carrier has to be added to make these signals audible BFO FITCH RF GAIN MINT LT 1111 1 IMAX VOLUME 2 Extend the antenna fully straight up 3 Set the BFO switch to IN 28 crv MONO STEREO BFO LOCK on R R WIDE NARROW OUT IN OUT IN LAM Rotate the BFO PITCH control to the midpoint 4 BFO PITCH RF GAIN LsB MIN MAX usb Rotate the RF GAIN control to the MAX position BFO PITCH RF GAIN LSB usB MIN MAX Press the AM band button to select the
6. R BALANCE LOPTILITITIIIH TREBLE LOPLI TAINH BAS T 1 Press the POWER button to turn on the radio 2 Select a band MNT 11 TU I IMAX VOLUME 3 a Repeatedly press the UP or DOWN button until you reach the fre quency you want or reach a station you want to listen to Press and hold the UP or DOWN buttons to rapidly change frequencies STORE RECALL UP e kui 17 b Rotate the tuning knob in either direction until you reach a desired frequency or station with all five SIGNAL indicators light to obtain best reception LIfe BALANCE ao oO LOHIT tis TREBLE C M LO ISIFITI ILI T Note When you repeatedly press an UP or DOWN button the frequen cy on the FM band changes by 05 MHz each time you press a button On all other bands the frequency changes by 1 kHz When you press and hold an UP or DOWN button the frequency on the FM band changes by 50 MHz On all other bands it changes by 10 kHz When you turn the TUNING knob slowly in the AM band the display changes in 1 kHz increments Slightly faster turning of the knob causes the display to change in 10 kHz and very fast turning of the knob causes changes in 100 kHz increments Turn the knob quickly until the display nears the desired frequency Then turn it slowly for precise tuning 4 Adjust the VOLUME TREBLE BASS and BALANCE MINI IHITAI IMAX VOLUME LLL LLL 111p BALANCE LO
7. Weak or intermittent sound e Weak radio batteries gt Antenna adjustment insufficient e Weak signal Try moving the unit near a window when operating inside a vehicle or in a metal frame building e Tuning slightly off frequency Use UP or DOWN key to fine tune Frequency cannot be keyed in when direct tuning x EXECUTE was not pressed within 5 seconds Microprocessor failed to initialize Remove the microprocessor batteries wait one minute and re install Scanning or memory frequency cannot be keyed in e EXECUTE was not pressed after the frequency was keyed in Will not scan on AM e Limit frequencies are not keyed in Scanning stops where there is no clear signal Birdies the internally generated signals mixed with external signals A telescopic antenna is likely to pick up these undesirable signals use an out door antenna A few of the most common birdies are 455 kHz 3 844 kHz 9 000 kHz 10 245 kHz 18 000 kHz 20 490 kHz 21 835 kHz 21 868 kHz Scanning does not stop automatically e Weak signal s RF GAIN is not set to MAX SS Memorized frequency cannot be recalled e Wrong band is set Switch bands s Memory has been erased Re enter the frequency SLEEP does not function The SLEEP button is not pressed The power switch is set to on If none of the above suggested remedies solves the problem return your set to your nearby Radio Shack store for assistance 47 CARE AND MAINTENANCE
8. locations 120 meters 2 300 2 500 kHz 90 meters 3 200 3 400 kHz 75 meters 3 900 4 000 kHz 60 meters 4 750 5 060 kHz The rest of the shortwave range is filled with marine aeronautical and military stations Such stations usually use either SSB or CW and can be found outside the amateur and broadcast bands THE SHORTWAVE HOBBY Shortwave listening is a hobby with thousands of participants worldwide While no special knowledge is required for SWL you will find your enjoyment increases with experience and special techniques for listening Random tuning on your DX 440 is a good idea if you ve never owned a Communications Receiver before In this way you can get acquainted with the various bands and the stations that can be heard But after you ve been listening for a while you ll discover that you can get more enjoyment by organ izing your listening efforts Doing a little bit of library research can increase your skill as a SWL Read up on radio propagation and theory try to understand the conditions which make long distance reception possible In your local library you can find such valuable references as the World Radio Television Handbook and the Radio Amateur s Handbook Current intorma tion can be found by consulting period icals dealing with communications and electronics Keep up to date on news events around the world There s much interesting listening just tuning to the interna
9. much more if you do Welcome to the world of the short wave listener For your own protection we urge you to record the serial number of this unit in the space provided below The serial number is located inside of the battery compartment Serial Number 1987 Tandy Corporation All Rights Reserved Realistic is a registered trademark of Tandy Corporation FEATURES Wide Tuning Range lets you receive more stations from more places than ever before Fast Response LCD shows you the frequency you select in large easy to read numbers Direct Access Keypad lets you in stantly tune in any desired frequency from 87 5 to 108 MHz on the FM band and from 150 kHz to 29 999 kHz on the AM band Up to 9 Storable Frequencies give you instant response for your favorite stations or transmission sources Multiple Power Source Operation means you can use it virtually any where in the world K Supplemental Tuning Controls allow adjustment for maximum clarity of the selected frequency Dual Function Mode Switch allows you to display the frequency or the time on the LCD panel Scanning Contro lets you check the various transmissions on a certain band and lock on to the chosen frequency Full Range Tone Controls tets you customize the sound for clarity and listening comfort Stereo Headphones Jack lets you listen to FM Stereo programs in full stereo CO
10. to flash for five seconds During this period use the UP and DOWN buttons or the tuning knob to reach the daily turn on time using a 24 hour clock displayed in hours and minutes For example to set the radio to turn on at 1 24 P M each day use the buttons or turn the knob until the display shows 13 24 CPU aR LO LU ILL 1111 TREBLE LOM tit al 23 4 When you reach the desired turn on time press the MODE button to lock the setting STANDBY stops flashing In a few seconds the display reverts to the clock mode and shows the current time STORE RECALL UP Press the TIMER button once STANDBY disappears LIGHT TIMER SLEEP To check the daily turn on time press it again to display the STANDBY TIMER all the time USING THE SLEEP TIMER To have the radio turn itself off after a period of 90 minutes or less proceed as follows 1 24 Press the SLEEP button The display shows SLEEP 90 in the upper right corner LIGHT TIMER SLEEP 2 If you want fewer than 90 minutes playing time press the SLEEP button again Each time you press the but ton the playing time reduces by 10 minutes To turn off the radio before it normal ly turns itself off press the POWER button LIGHT TIMER SLEEP MINE TEL III LIMA VO
11. 12A7 RADIO SHACK LIMITED WARRANTY This product is warranted against defects for 90 days from date of purchase from Radio Shack company owned stores and authorized Radio Shack franchisees and dealers Within this period we will repair it without charge for parts and labor Simply bring your Radio Shack sales slip as proof of purchase date to any Radio Shack store Warranty does not cover transportation costs Nor does it cover a product subjected to misuse or accidental damage EXCEPT AS PROVIDED HEREIN RADIO SHACK MAKES NO WARRANTIES EXPRESS OR IMPLIED INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE Some states do not permit limitation or exclusion of implied warranties therefore the aforesaid limitation s or exciusion s may not apply to the purchaser This warranty gives you specific legal rights and you may also have other rights which vary from state to state We Service What We Self RADIO SHACK A Division of Tandy Corporation Fort Worth Texas 76102 Printed in Taiwan DX 440 OWNER S MANUAL AM FM DIRECT ENTRY COMMUNICATIONS RECEIVER Please read before using this equipment Sup l romea CR sonnia 70585 ni ae seal MO AMO R MNO SW C1 y a PU SYNTHESIZED CIRCUIT AM FM DIRECT ENTRY COMMUNICATION RECEIVER ia sro pric Rr Gam g HII
12. 4 915 4 920 4 945 4 965 4 980 4 990 5 020 5 057 5 950 5 954 5 960 5 980 6 005 6 025 6 045 6 055 STATION Radio SR Radio Mozambigue Radio Cultural Radio Iris FR3 Radio Kaduna Radio Bertoua Imo Regional Radio Radio TV Gabon Radio Nueva America Radio Paz y Bien Radio Reloj Radio Clube do Para National Broadcasting Commission Voice Kenya LOCATION Swaziland Maputo Mozambique Guatemala City Guatemala Esmeraldas Ecuador Cayenne French Guiana Kaduna Nigeria Bertoua Cameroon Imo Nigeria Libreville Gabon La Paz Bolivia Ambala Equador San Jose Costa Rica Belem Brazil Port Moresby Papua New Guinea Nairobi Kenya AustralianBroadcasting Brisbane Australia Commission Radio Colosal Radio Santa Fe Ecos del Torbes Radio Barquisimeto Solomon Islands Broadcasting Service Radio Gjirokaster Guyana Broadcasting Service Radio Casino Radio Canada International Radio RSA CFCX Radio Malaysia Radio Australia Nihon Shortwave Neiva Colombia Bogota Colombia REMARKS Programs in Portuguese Religious Programs Programs in Spanish Programs in French Programs in French Programs in Spanish Programs in Spanish Programs in Spanish Programs in Portuguese Programs in Spanish Programs in Spanish San Cristobal Venezuela Programs in Sapnish Barquisimeto Venezuela Programs in Spanish Honiara Solomon Islands Gjirokaster Albania Georgetown Guyana Progr
13. AC using an optional AC adapter Cat No 273 1455 Plugthe small con nector of the adapter into the DC IN 9V socket on the side of the unit Plug the adapter into a standard household outlet Note When you use AC the DX 440 automatically disconnects the internal batteries 273 1455 AC Adapter USING AN AUTOMOTIVE BATTERY You can operate the DX 440 in a car boat or recreational vehicle that is equipped with a 12 Volt DC negative ground battery Use a DC adapter Cat No 14 844 14 844 DC Adapter Insert the adapter plug into the jack marked DC IN 9V on the side of the DX 440 Plug the other end of the adapter into the lighter socket of the vehicle ai Note When you connect the adapter the DK 440 automatically disconnects the internal batteries Caution Do not let the adapter s barrel plug contact any metal parts of the vehicle when the adapter is plugged into the lighter socket of the vehicle but not yet plugged into the DX 440 A harmful short can occur that can damage the adapter or the vehicle s electrical system PRELIMINARY SETTINGS SETTING THE CLOCK The display shows the time in a 24 hour mode except when you are tuning a station or performing some other opera tion The radiouses the 24 hour mode The clock starts when you install the two AA batteries The display shows CLOCK 0 00 Note If after installing the two AA batteries the display does not sho
14. AM band Tune in the CW station using the tuning knob or enter the frequency using the direct access buttons LIJIItHIjIl IA BALANCE 19 LLL 111 1111 n TREBLE 10 LILI 11111111 n 7 29 8 Adjust the CW tone using the BFO PITCH control 9 Reduce strong signals by using the RF GAIN control This also reduces interference and noise TO RECEIVE SSB VOICE 1 Turn on the radio BFO PITCH RF GAIN POWER MINT Li TI EY IY MAX VOLUME 2 Extend the antenna fully in a straight up position 3 Set the BFO switch to the IN position 30 lt MONO STEREO BFO WIDE NARROW OUT IN LOCK on OUT IN Rotate the BFO PITCH control to the LSB position for stations below 10 MHz or to the USB position for sta tions above 10 MHz BFO PITCH RF GAIN MAX position Rotate the RF GAIN control to the BFO PITCH RF GAIN 1sB use MIN MAX L58 USB MIN MAX Press the AM button to select the AM band EM AM LW MW SW E TTL T 7 Tune in the SSB station using the tuning knob or enter the freguency using the direct access buttons Lili IU TITI R BALANCE LOTTI EAI TAEBLE LOTTI TH BAS an T 8 a 0 SEC EXECUTE 31 8 Rotate the BFO PITCH control to ad just the signa guality 9 Rotate the RF GAIN c
15. Arabic Berlin East Germany Oslo Norway Tehran tran Quito Equador Vienna Austria Kiev USSR Budapest Hungary Hanoi Vietnam Jerusalem Israel Kuwait Kuwait Stockholm Sweden Moscow USSR Sofia Bulgaria Taipei China Tokyo Japan Papeete Tahiti Cap Haitien Haiti Montreal Canada Programs in Farsi Programs in Tahitian 11 850 Deutsche Welle 11 890 Voice of Chile 11 900 Radio RSA 11 910 BBC 11 930 Radio Havana Cuba 11 935 Radio Portugal 11 945 Radio Peking 11 955 Voice of Turkey 11 980 Radio Moscow 15 038 Saudi Arabian Broadcasting Service 15 084 Voice of Iran 15 135 Radio Moscow 15 165 HCJB 15 190 ORU 15 205 All India Radio 15 260 BBC 15 265 Finnish Radio 15 275 Radio Sweden 15 305 Swiss Radio International 15 310 Radio Japan 15 320 Radio Australia 15 400 BBC 15 430 Radio Mexico 15 465 Radio Pakistan 17 720 Radio France international 17 825 Vatican Radio 17 860 Austrian Radio 21 495 Israel Radio 21 525 Radio Australia 21 625 israel Radio 21 645 Radio France International 21 735 Radio TV Morocco 25 650 BBC 25 790 Radio RSA Cologne West Germany Santiago Chile Johannesburg South Africa London England Havana Cuba Lisbon Portugal Peking China Ankara Turkey Moscow USSR Riyadh Saudi Arabia Programs in Arabic Tehran Iran Moscow USSR Qiito Ecuador Brussels Belgium New Delhi India London England Helsinki Finland Stockholm Sweden Berne Switzerland Programs in Farsi Toky
16. LLL T TTT TREBLE LOINA BASS SCAN TUNING Use scan tuning to quickly locate a sta tion or to monitor several stations within a band 1 Turn on the radio T MINJ LY TAT i MAX VOLUME 2 Select a band 3 Adjust the antenna or radio position according to the chosen band 4 Press the SCAN button The radio begins to scan the frequencies in the band from lowest to highest It stops when it reaches a station The signal strength of the station registers on the SIGNAL indicators When all five indicators light SIGNAL is the best STORE RECALL UP 5 Press the SCAN button again to STORE MEMORY TUNING resume upward scanning When the You can store up to nine different fre radio reaches the upper freguency guencies and have them available for limit of the band it continues scan instant selection ning starting again at the lowest fre quency on the band 7 i S L To Store a Freguency You can fine tune the station using the UP or DOWN buttons Tune so that the most SIGNAL indicators light for best reception 1 Turn on the radio E MINJ J141 1 MAX VOLUME 4 Adjust the VOLUME TREBLE BASS MNI LLL LLL LLL IMAX VOLUME and BALANCE contorls 4 2 Tune to any frequency using any of the previously mentioned techniques 1118 BALANCE Press the STORE button The word STORE flashes on the display for five seconds During this
17. LUME T 25 SPECIAL TUNING TECHNIGUES AND CONTROLS In addition to the standard tuning oper ations described previously use the following controls for special operations RF GAIN CONTROL This control adjusts the receiver s sen sitivity For shortwave reception rotate the control to the MAX position This provides the maximum sensitivity When you listen to the MW standard AM band or LW band rotate the control only as far as needed to obtain a good signal If you turn the knob further you might hear a distorted signal For weak Stations rotate the control to the MAX position BFO PITCH RF GAIN 1 56 USB MIN MAX If you encounter interference adjust the control in both directions until you obtain the best compromise between your station and the interference BFO PITCH RF GAIN LSB use MIN MAX 26 AM NARROW WIDE SELECTIVITY SWITCH Some stations transmit their signal so that very little space exists between their airspace and the station next to them on the band If while tuning you encounter interference caused by the signal from an adjacent station press the button for the band you are listening to and select the NARROW position The interference is reduced or muted FM MONO sree BFO LOCK WIDE NARROW out H our N AM K For full reception leave the switch in the WIDE position FM MONO sdo BFO LOCK ee WIDE NARROW QUT IN OUT IN Lam a If you plan to listen to Morse code
18. NTROL LOCATIONS 1 LIGHT Button 2 TIMER Button 3 SLEEP Button 4 SIGNAL Strength indicators 5 LCD Display 6 Telescopic Antenna 7 FM STEREO Indicator 8 POWER On Indicator 9 POWER Switch 10 VOLUME Control 11 Dual Function Tuning Control 12 BALANCE Control 13 TREBLE Control 14 BASS Control 15 RF GAIN Control 16 BFO PITCH Control 17 LOCK Switch 18 BFO OUT IN Switch 19 FM MONO STEREO AM WIDE NARROW Mode Selector 20 STORE Button 21 RECALL Button 22 UP Button 23 DOWN Button 24 SCAN Button 25 MODE Button 26 EXECUTE Button 27 Band Selectors 28 Number Entry Buttons 29 Time Mode SEC onds Reset button 30 STEREO headPHONES Jack 3 5mm 31 DC IN 9V Jack aoe gaur 29 28 2726 25 20 2423 2221 19 18 32 Folding Stand 35 Battery Compartment 33 EKTernal Antenna Jack 36 9k 10kHz Step Switch 34 EKTernal INTernal Antenna beneath batteries Selector 37 Battery Removal Strap 19 CHOOSING A POWER SUPPLY You can operate the DK 440 using that you can lift
19. The first chart indicates the length of wire re guired for optimum performance on the Freguency 150 kHz 500 kHz 520 kHz R 1600 kHz 1600 kHz 4500 kHz 4500 kHz s 12000 kHz 12000 kHz E 29999 kHz Wave Length Ham Band 160 meter 80 meter 40 meter 20 meter 15 meter To calcuate antenna length for a specific frequency You can determine the exact length of wire you need for a specific frequency using the following information Then obtain bare copper wire stand off in sulators and an appropriate length of lead in wire Be sure to use a static discharge unit to guard against lightning damage For complete information refer to The Radio Amateur Handbook published by the American Radio Relay League specified band The second chart gives you the required length of wire to receive the amateur radio operator s bands Antenna Wire Length feet 1440 Lengths generally 441 impractical to erect 153 57 22 Antenna Wire Length feet 246 117 66 33 22 This formula results in a half wave antenna Length of a 1 2 wave antenna 468000 Desired Frequency kHz For example to pick up international shortwave signals in the 19 meter band 15100 to 15600 kHz pick a represen tative frequency such as 15350 kHz The formula then becomes 468000 30 1 2 feet 15350 35 SYSTEM GROUNDING To ensure the best reception always connect a ground wire to the external antenna jack Connec
20. ams in Albanian Puerto Limon Costa Rica Montreal Canada Johannesburg South Africa Montreal Canada Kuala Lumpur Malaysia Programs in Chinese Lyndhurst Australia Tokyo Japan Broadcasting Company Programs in Japanese 43 6 060 Radio Nacional 6 075 Radio Sutatenza 6 090 Radio Luxembourg 6 095 Polskie Radio 6 105 Radio New Zealand 7 140 Trans World Radio 7 170 Radio Noumea 7 300 Radio Tirana 9 475 Radio Cairo 9 515 Voice of Greece 9 525 Radio Korea 9 530 Spanish Foreign Radio 9 535 Swiss Radio International 9 540 Radio Prague 9 570 Radio Bucharest 9 575 Italian Radio and Television Service 9 610 Radio TV Algeria 9 620 Radio Berlin International 9 645 Radio Norway 9 720 Radio iran 9 745 HCJB 9 770 Austrian Radio 9 800 Radio Kiev 9 835 Radio Budapest 10 040 Voice of Vietnam 11 655 Israel Radio 11 690 Radio Kuwait 11 705 Radio Sweden 11 720 Radio Moscow 11 735 Radio Sofia 11 745 Voice of Free China 11 815 Radio Japan 11 825 Radio Tahiti 11 835 4VEH 11 845 Radio Canada International 44 Buenos Aires Argentina Programs in spanish Bogota Colombia Programs in Spanish Ville Louvigny Luxembourg Warsaw Poland Wellington New Zealand Monte Carlo Monaco Noumea New Caledonia Programs in French Tirana Albania Cairo Egypt Athens Greece Seoul South Korea Madrid Spain Berne Switzerland Prague Czechoslovakia Bucharest Rumania Rome Italy Algiers Algeria Programs in
21. e for ships are 4 063 4 139 kHz 4 361 4 438 kHz 8 195 8 181 kHz 12 330 12 420 kHz 13 107 13 200 kHz 16 460 16 565 kHz LISTENING NOTES If you have never tuned a shortwave receiver before you may be a bit con fused by the wide variety of signals that can be heard To help you find your way around the bands here is a sum mary of what to expect The 150 540 kHz range is known as the long wave band You ll find recep tion here best at night in your location The majority of stations use Morse code although you will hear AM used for weather broadcasts The largest number of stations in this range are beacons for aircraft and marine naviga tion Beacons transmit their call letters continuously in Morse code at a slow speed A manual on air or marine navigation available from your public library or a marine supply store will contain lists of these beacons and their locations Weather broadcasts on AM often iden tify themselves by their location instead of by call letters such as New Orleans Radio Many ship stations also use this range with 500 kHz set aside by international agreement for distress and emergency calls International broadcast stations can be found in the bands indicated in our sec tion on Band Allocations Many such Stations operate in English and often can be heard during the evening hours between 6 00PM and Midnight your local time Programming usually con sists
22. l other nations have similar stations FREQUENCY CONVERSION Oo S Your communications receiver is calibrated in Megahertz MHz and Kilohertz kHz as most communi cations type receivers are You should be familiar with these terms Megahertz Millions of hertz or cycles per second A Megahertz is 1 000 000 hertz Hz for short or 1 000 000 cycles per second Mega means million Kilohertz Thousands of hertz A kilohertz is 1 000 hertz We use the abbreviation kHz Kilo means thousand Meter The term meter as applied to shortwave listening refers to the wavelength of a radio frequency In many parts fo the world frequencies are listed in meters for example inter national shortwave stations in the 19 Meter band European radio equipment and stations often refer to the wave length of a station or band in meters rather than frequency in MHz or kHz The relationship of these three terms is 1 MHz million 1 000kKHz thousand To change 9 62 MHz to kHz we multiply by 1000 9 62 x 1000 9620 kHz To go the other way from kHz to MHz divide by 1000 A station at 3780 kHz is 3780 _ 3 780 MHz 1000 To convert MHz to meters use this formula 300 Meters MHz Example What is the wavelength of 7 1 MHz 300 7 1 MHz 42 25 meters 41 COUNTRY LOG The following listing contains some of the more freguently heard stations on shortwave The stations li
23. meter band of You can key in any frequency within the range of the radio by selecting the band in which that frequency operates and then pressing the number buttons of that frequency 5 Extend the antenna fully stranght up for the best AM SW reception Example To tune to 7305 kHz on the AM band 1 Press the POWER button to turn on E BONER the radio MaL LL 1111 I IMAX VOLUME 2 Press the AM band button 6 Adjust the VOLUME and TREBLE BASS tone controls for the desired sound level MaL 11 1 LL 1 1 I MAX VOLUME LULU IUT IA BALANCE LO LI LIL TTT n TREBLE L lI lL 1111 BASS Note If you select the FM band and tune to an FM stereo station move the FM mode switch to STEREO and ad just the BALANCE control for the best stereo headphone reproduction The built in speaker is monaural For the best sound result when listening with the built in speaker do not forget to return the BALANCE control to the mid position 16 FM mbuo srenco BFO LOCK oe ve oe WIDE NARROW OUT IN OUT IN Cam MRL L 1 1 LL 1 LIMAO a L ULL LLL 1 111p BALANCE LO l 11 LLL 111 TREBLE 1911 LL 1111 BASS CONTINUOUS TUNING If you do not know the exact frequency of the station you want to listen to you can check the broadcasts on a band using the UP DOWN buttons or the tun ing knob RECALL UP Lotti ltttil
24. o Japan Melbourne Australia London England Mexico City Mexico Islamad Pakistan Paris France Programs in Spanish Programs in Urdu Vatican City Vienna Austria Jerusalem Israel Melborne Australia Jerusalem Israel Paris France Rabat Morocco London England Johannesburg South Africa Programs in Arabic 45 TROUBLESHOOTING The DX 440 is a ruggedly built elec tronic unit with all parts conservatively rated However you should treat it with care don t subject it to excessively rough handling You will find it will give you long life enjoyment if kept free from excessive humidity If you have problems we hope you don t check the following FREQUENCY DISPLAY No incorrect display e Weak microprocessor or radio batteries e Microprocessor fails to initialize This may happen when you first install or replace batteries Remove the micro processor batteries wait for about one minute and re install Display is dim Weak microprocessor or radio batteries Environment is inappropriate for operation temperature is too high or too much humidity RADIO No sound Check the VOLUME control setting Headphone jack is plugged in gt Weak radio batteries x AC adapter cord not firmly plugged x DC power cord is not correctly in serted into cigarette lighter socket in vehicle operation AC jack or external DC jack is plugg ed in when trying to operate on bat teries
25. of news commentaries local music and features on life in their 40 respective countries Among the statians that are listener favorites worldwide are Radio Japan the British Broadcasting Company Israel Radio Radio Neder land in Holland and Radio Australia You ll soon discover which stations will be your personal favorites In tropical areas of the world static makes reception on the standard AM broadcasting band very difficult This has resulted in special Tropical Bands set aside for nations located in tropics Programming here is intended for local audiences and much of what can be heard is a treat exotic languages beautiful and unusual music etc Some English can be heard however from stations in Africa or the Pacific You ll find time standard stations quite useful These stations give out the ex act time of day at specified intervals The National Bureau of Standards operates station WWV in Fort Collins Colorado on 2 500 5 000 10 000 15 000 and 20 000 kHz A man s voice gives the time each minute along with periodic reports on shortwave reception conditions The National Bureau of Standards also operates another sta tion WWVH on the same frequencies as WWV in Hawaii WWVH uses a woman s voice to give the time Some times you can hear these two stations simultaneously Other time standard stations are Canada s CHU on 3 330 7 335 and 14 670 kHz and VNG in Australia on 4 500 and 12 000kHz Severa
26. ontrol to dampen strong signals This can im prove signal clarity as weli BFO PITCH Ls8 use BFO PITCH Note Before choosing another band set the RF GAIN contro to MAX and move the BFO switch to the OUT position 32 L 2 MONO greko BFO LOCK On on GR WIDE NARROW OUT N OUT IN Lam To Attach The Shoulder Strap 1 Insert about five inches of the end of the strap into the strap hanger Pull the free end of the strap upward and insert the end into the lower edge of the strap buckle as shown in Figure 1 USING THE SHOULDER STRAP Figure 1 Pull at least three inches of the strap end through the buckle See Figure 2 Then bring the end of the strap beneath the upper end of the buckie Refer to Figure 3 Figure 2 Figure 3 More than 3 More than 2 Pull the free end taught Be sure that at least two inches of strap extend from the upper end of the buckle Slip the extra strap beneath the belt loop See Figure 4 To remove the shoulder strap follow Figures 5 6 and 7 to reverse the procedure Figure 4 More than 2 Figure 5 Figure 6 33 CHOOSING AN ANTENNA The radio uses a telescoping antenna and an internal ferrite bar antenna for reception of signals between 150 kHz and 1620 kHz These antennas provide acceptable reception for most situa tions However if you use an external antenna you can receive more signals and the signals you recei
27. period press one of the nine number but tons The display shows the storage number you selected and stores the chosen station in that memory location Note You do not have to store your first station as location 1 You can choose any location as your first choice MODE STORE LOTLITEITINt IH TREBLE RECALL Lolita bt BASS uP EXECUTE 20 21 To Recall a Freguency 1 Turn on the radio Me LLL wax cat POWER 2 Press the RECALL button The dis play flashes MEMO for five seconds MODE STORE RECALL During this time press the storage number button for the desired station The radio instantly tunes to that sta tion and displays the frequency and the storage number Note If you make no selection while STORE or MEMO flashes the radio returns to the normal playing mode 22 CLOCK RADIO OPERATION You can use the DX 440 to wake you up to your favorite station everyday And before you retire for the evening you can set the timer so that the radio SETTING THE ALARM 1 Press the TIMER button The display shows 0 00 and STANDBY for five seconds turns itself off after an interval between 10 and 90 minutes Make the following settings with the power off LIGHT TIMER SLEEP aN a LU STANDBY During this period press the STORE button STANDBY starts
28. range FM AM LW MW SW Antennas LW MW SW FM Output 50 1 pe 7 pes 8 pes 44 pcs 59 pcs 7 pcs superh Dual conversion superheterodyne 87 5MHz 108MHz LSI ICs FETs Transistors Diodes LEDs eterodyne 150 kHz 29999 kHz 150kH 520kHz 1620kHz divided into 12 shortwave bands 120M 90M 75M 60M 49M 41M 31M z 281kHz 2300kHz 3200kHz 3900kHz 4750khz 5BOOkHz 7100KHz 9500 kHz 2500 kHz 3400kHz 4000 kHz 5060 kHz 6200 kHz 7500 kHz 9900 kHz 25M 11650 kHz 12050kHz 19M 15100kHz 15600 kHz 16M 17550kHz 17900kHz 13M 21450kHz 21850kHz 11M 25600 kHz 26100kHz Built in ferrite bar antenna Swivel telescopic antenna External antenna terminal Swivel telescopic antenna External antenna terminal Not apply to W Germany 1200mMW 10 THD nee saa Jacks Power sources Dimension Weight Accessories 1 DC jack for external power 9V 2 Headphones Jack 3 54 for mini stereo headphones 1 For Power when not playing radio AA size pentight battery such as Radio Shack 23 552 or 23 582 not supplied for memory clock back up 3V 2 For Power to play radio a D size battery such as Radio Shack 23 550 or 23 580 not supplied x 6pcs 9V b AC adaptor 9V 400mA center negative 1 35 9 gt L 292mm x 160mm x 60mm 115 x6 X 252 x x 1 7kg 3 75 Ibs or 60 02 without batteries Shoulder st
29. rap 51 ADDENDUM Cat No 20 221A DX 440 AM FM DIRECT ENTRY COMMUNICATIONS RECEIVER The following specifications for sensitivity image rejection and selectivity are provided for your reference Sensitivity for 20 dB Signal to Noise ratio AM 150 kHz 1260 u im 300 kHz 560 NI 600 kHz 320 pVim 1 4 MHz 280 wim 3 1 MHz 4 uv 71 MHz 4 pV 15 1 MHz 4 pV 28 1 MHz 4 pV for 10 dB Signal to Noise ratio SSB 150 kHz 100 pVim 300 kHz 40 pVim 600 kHz 25 p m 1 4 MHz 22 uVim 3 1 MHz 0 4 pV 7A MHz 0 4 uv 15 1 MHz 0 4 pv 28 1 MHz 0 4 wv for 30 dB Signal to Noise ratio FM 87 5 to 108 MHz 4 uV to be continued on the back Image Rejection Ratio AM SSB 150 kHz 48 dB 300 kHz 65 dB 600 kHz 65 dB 1 4 MHz 60 dB 3 1 MHz 60 dB 7 1 MHz 60 dB 15 1 MHz 60 dB 28 4 MHz 60 dB FM 87 5 to 108 MHz 40 dB Selectivity AM SSB 6dB 50dB Wide 3 7 kHz Narrow 2 4 kHz IF AM SSB CW Ist 55 845 MHz 2nd 450 kHz FM 10 7 MHz Frequency Stability Within 1 kHz per hour after 60 minutes warm up RADIO SHACK Fort Worth Texas 76102
30. sted can be heard throughout the North American Continent All stations operate in English unless otherwise specified Most of these stations do not broadcast continuously Obviously reception will vary on the dif ferent frequencies according to the time of day and season of the year Remember that reception from different parts of the world varies with the time of day and the frequency to which your DX 440 is tuned Consult the section on Changes in Reception for a more detail ed explanation of these variations Remember also that the 7 000 7 300 kHz range ts shared by hams and in ternational broadcasts consequently interference is severe in that range While every effort has been made to en sure the accuracy of this list stations can and do change frequencies Check periodicals on communications and electronics for more current information on station frequencies and schedules This list only contains broadcasting sta tions which operate on fixed frequencies with regular schedules Ham military marine and aeronautical stations operate on varied frequencies with irregular schedules These listings can change at any time and are here for your reterence only 42 No attempt has been made to provide an accurate up to date listing For a yearly up to date listing check the world radio television hand book kHz 3 223 3 265 3 300 3 380 3 385 3 396 4 750 4 755 4 777 4 795 4 820 4 832 4 855 4 890
31. t the single wire lead in to the center terminal of the RCA plug Connecta suitable earth ground to the outer terminal of the plug A suitable earth ground can be a clamp around a metal water pipe or a copper rod driven several feet into the earth Radio Shack sells a copper ground rod Cat No 15 530 and the appropriate hardware 36 EXT ANT GROUND BAND ALLOCATION To avoid interference and confusion certain portions of the radio spectrum have been set aside for specific pur poses Perhaps the most familiar exam ple is 540 1600 kHz the standard AM broadcast band Ham radio operators use the following bands 160 meters 1 800 2 000 kHz 80 meters 3 500 4 000 kHz 40 meters 7 000 7 300 kHz 20 meters 14 000 14 350 kHz 15 meters 21 000 21 450 kHz 10 meters 28 000 29 700 kHz International broadcasting stations have several bands set aside for them 49 meters 5 800 6 200 kHz 41 meters 7 100 7 500 kHz 31 meters 9 500 9 900 kHz 25 meters 11 650 12 050 kHz 19 meters 15 100 15 600 kHz 16 meters 17 550 17 900 kHz 13 meters 21 450 21 850 KHz 41 meters 25 600 26 100 kHz Note that broadcasts and hams share 7 100 7 300 kHz and interference is heavy in that range Broadcasts in tropical regions have special bands set aside for them In such areas shortwave is the only way to reach isolated
32. them easily for replacement e Six alkaline D batteries and two AA batteries Household AC with an optional AC adapter A 12 Volt DC automotive battery with an optional DC adapter INSTALLING BATTERIES 1 Press the latch on the battery com partment cover in the direction of the OPEN label and lift the cover off Note Before installing the next set of batteries verify that the frequency step selector switch is set to the position correct for your country In the USA move the switch to the 10K position In other countries set it to 9K 2 Insert two AA alkaline batteries such as Radio Shack Cat No 23 552 in the smaller battery chamber within the main compartment Position them as illustrated on the back of the radio Place these batteries and the next set of batteries on top of their re spective battery removal ribbons so 3 Insert six D batteries in the main bat tery compartment Position them as shown in the illustration on the back of the radio For best results use alkaline batteries such as Radio Shack Cat No 23 550 gt Insert the bottom projections on the edge of the battery compartment cover inside the lower edge of the compartment opening Lower the cover and snap the top latch down until it clicks closed e Carew y y a L Bottom polis USING HOUSEHOLD AC You can power the DK 440 from house hold
33. tional service of a nation where an important event is taking place Ham radio operators can be found in the bands listed in our Band Allocations section You ll find that hams mainly 38 use Morse code or CW as they refer to it and SSB The ham bands are divided up into CW and SSB sections in the following manner 3 500 3 800 kHz CW 3 800 4 000 kHz SSB 7 000 7 150 kHz CW 7 150 7 300 kHz SSB 14 000 14 200 kHz CW 14 200 14 350 kHz SSB 21 000 21 250 kHz CW 21 250 21 450 kHz SSB 28 000 28 500 kHz CW 28 500 29 700 kHz SSB These boundaries are not precisely observed everywhere in the world so don t be too surprised to find an SSB signal in the CW portion of a band and vice versa Some of theranges where aircraft may be flying international routes use short wave for their communications Most transmissions are in SSB although some AM is still heard Some of the ranges where aircraft can be heard include 4 650 4 750 kHz 6 545 6 765 kHz 8 815 9 040 kHz 10 000 10 100 kHz 14 175 11 400 kHz 13 200 13 360 kHz 15 010 15 100 kHz 17 900 18 030 kHz Ships and coastal stations can aiso be heard on shortwave Most communica tions are in SSB and CW One in teresting range is 2 000 2 300 kHz where the Coast Guard and many small boats can be heard One frequency to watch is 2 182 kHz which is an inter national distress and emergency chan nel Other bands in which to tun
34. ve will be better FM BAND e Use a set of VHF TV rabbit ears Those made for TV FM coverage can help get better performance on the FM band Use an outdoor FM antenna This type specially designed for optimum FM performance requires rooftop or similar location mounting 34 s Use a combination TV FM antenna Note To use an external antenna equipped with 300 ohm twinlead connect the twinlead s terminals toa 300 to 75 ohm matching trans former Cat No 15 1253 Then insert the 75 ohm connector of the transformer into an F to RCA adapter Cat No 278 252 Finally insert the RCA type plug of the adapter into the RCA antenna jack of the receiver Be sure to move the antenna switch to EXT gt If your antenna uses 75 ohm coaxial cable attach the connector of the cable to Cat No 278 252 which also terminates in a RCA type plug In sert the RCA plug into the ANT jack and move the switch next to the jack to EXT AM SHORTWAVE BANDS For AM reception you can use many different types of antennas Unfor tunately no single antenna can effec tively cover the entire frequency range of the DX 440 from 150 kHz to 29999 kHz A general purpose shortwave antenna such as Cat No 278 758 can provide better reception than either of the built in antennas However if you want the best possible reception on one specific band your antenna must be a certain length Refer to the following charts
35. w CLOCK 0 00 remove the batteries and install them one minutes later The display will show CLOCK 0 00 because mostshortwave stations sched ule their broadcasts on the basis of Greenwich Mean Time which is a 24 hour clock Sa IN br ri 1 Press the MODE button MODE STORE SCAN RECALL UP 2 Press the STORE button CLOCK flashes in the display for five seconds STORE t RECALL UP 3 During this period press the UP or DOWN buttons to reach the correct time in hours and minutes or rotate the tuning knob to quickly reach the correct setting Note digit of time can be adjusted only when CLOCK is flashing in the display MODE STORE or SCAN RECALL DOWN UP Cat CJ 4 Press theO SEC button The display shows the minutes and seconds set ting Press the STORE button to reset the seconds to 00 and the display return to the hours and minutes Note When CLOCK is flashing O SEC button does not function SELECTING A BAND AND TURNING ON POWER The radio has five band select buttons beneath the EXECUTE button EXECUTE 4 many Lene TUNING THE RADIO ADJUSTING THE ANTENNA Band Frequency Service Locate the band to which you want to Button Min Max tisten in the following chart Adjust the antenna as indicated
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