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DX-440
OWNER'S MANUAL AM/FM DIRECT ENTRY
COMMUNICATIONS RECEIVER
RADIO SHACK LIMITED WARRANTY
Please read before using this equipment
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 transport
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CONTENTS INTRODUCTION Introduction 3 You now have the world at your finger The radio uses the latest solid-state Features 4 tips.Just press the buttons of yourDX technology to provide programming, Control Locations 5 440 to listen to a variety of voices from a large liquid crystal display (LCD), Choosing a Power Supply............... 7 around the world. In addition to your and a host of other convenient . Preliminary Settings 10 AM and FM broadcast stations, features. Because this product is s
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CONTROL LOCATIONS FEATURES • Supplemental Tuning Controls 1. lIG HT Button • Wide Tuning Range_lets you receive 18. BFO OUT/IN Switch 2. TIMER Button 19. FM/(MONO/STEREO)/AM(WIDE/ allow adjustment for maximum clarity more stations from more places than 3. SLEEP Button NARROW) Mode Selector of the selected frequency. ever before. 4. SIGNAL Strength Indicators 20. STORE Button 5. LCD Display 21. RECALL Button • Fast Response LCD-shows you the • Dual Function Mode Switch-allows 6.Telescopic Antenn
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CHOOSING A POWER SUPPLY 32. Folding Stand 35. Battery Compartment You can operate the DX-440 using: that you can lift them easily for 36. 9k/10kHz Step SWitch 33. EXTernal Antenna'Jack replacement.) (beneath batteries) 34. EXTernal/INTernal Antenna • Six alkaline D batteries and two AA 37. Battery Removal Strap Selector batteries. • Household AC (with an optional AC adapter) • A 12-Volt DC automotive battery (with an optional DC adapter) INSTALLING BATIERIES 1. Press the latch on the battery com
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USING AN AUTOMOTIVE 3. Insert six D batteries in the main bat USING HOUSEHOLD AC tery compartment. Position them as BATIERY You can power the DX-440 from house shown in the illustration on the back hold AC using an optional AC adapter, You can operate the DX-440 in a car, of the radio. For best results, use Note: When you connect the adapter, boat, or recreational vehicle that is alkaline batteries such as Radio Cat. No. 273-1455. Plug the small con the DX-440 automatically disconnects equipp
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PRELIMINARY SETTINGS 3 2 4. PresstheO/SEC button. The display 1 SETTING THE CLOCK shows the minutes and seconds set- because mostshortwavestations sched CJ D The display shows the time in a 24-hour CJ 5 6 4 ting. Press the STORE button to ule their broadcasts on the basis of mode except when you are tuning a reset the seconds to 00 and the Greenwich Mean Time which is a 24 station or performing some other opera CJ D CJ 9 7 8 display, return to the hours and hour clock. tion. The radio uses th
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TUNING THE RADIO ADJUSTING THE ANTENNA Service Frequency Band Locate the band to which you want to Max (Button) Min listen in the following chart. Adjust the as indicated. antenna MHz Normal FM broadcasts 87.5 108 FM BAND FREQUENCY ANTENNA 29999 kHz Entire AM Band AM 150 RANGE Longwave 281 kHz 150 LW MW 520 - 1620 kHz Internal - Rotate radio Normal AM broadcasts for best reception 1620 kHz MW 520 SW 2300 26100 kHz Shortwave in 12 sub-bands respond to the wavelengths of each Note: Each time you s
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You can select a frequency using four 3. Press [7], [3], [0], [5J. As you press 1 2 3 tuning methods: each button, the LCD shows the number. QQ~Q,. • Direct Tuning DOD 7 8 9 • Manual Tuning DOD ~ O/SEC~ EXECUTE • Scan Tuning Dr ) • Memory Tuning 4. Press the EXECUTE button within five seconds. The display shows the DIRECT TUNING 0.00 frequency and meter band of 4 5 6 SW. DOD You can "key in" any frequency within 7 8 9 the range of the radio by selecting the ODD DOD 4 5 6 band in which that frequ
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CONTINUOUS TUNING 6. Adjust the VOLUME and TREBLE/ MINI I I I I I I I I I lMAX VOLUME BASS tone controls for the desired ...~ sound level. If you do not know the exact frequency LIIIIIIIIIIIR BALANCE MODE STORE of the station you want to listen to, you ~ '-----_) [L_~ can check the broadcasts on a band using the UP/DOWN buttons or the tun SCAN RECALL LO I I I I I I I I I 11 HI TREBLE ing knob. '------_~) [L_~ ... ~ LO I I I I II I I I I t HI BASS ... c:::ElffiIII!ll OCJ Note: If you select the
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SCAN TUNING b. Rotate the tuning knob in either LIIII111111IR BALANCE direction until you reach a desired Use scan tuning to quickly locate a sta frequency or station with all five c:::E:IillIIIII tion or to monitor several stations within SIGNAL indicators light to obtain a band. LOIIIIIIIIIII>!1 TREBLE best reception. c:::E:IillIIIII 1. Turn on the radio. LO I II I I I I I I I I HI BASS POWER c:::E:IillIIIII Note: When you turn the TUNING knob When you repeatedly press an UP or DOWN button, t
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MEMORY TUNING STORE 5. Press the SCAN button again to MODE I IL(__I resume upward scanning. When the You can store up to nine different fre radio reaches the upper frequency SCAN RECALL quencies and have them available for limit of the band, it continues scan L=t=J (L....._I instant selection. DOWN UP ning starting again at the lowest fre quency on the band. L~[ I To Store a Frequency MODE STORE 6. You can fine tune the station using LI__I( ) the UP or DOWN buttons. Tune so 1. Turn on the rad
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CLOCK RADIO OPERATION You can use the DX-440 to wake you turns itself off after an interval between To Recall a Frequency up to your favorite station everyday. 10 and 90 minutes. Make the following And before you retire for the evening, settings with the power off. 1. Turn on the radio. POWER I I you can set the timer so that the radio _11111111111""'" VOLUME '*' SETIING THE ALARM I• mllllllllllill I I ..._-_. LIGHT TIMER SLEEP MODE STORE 2. Press the RECALL button. The dis- 1. Press the TIMER b
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2. If you want fewer than 90 minutes 4. When you reach the desired turn on STORE MODE LIGHT TIMER SLEEP playing time, press the SLEEP button ) time, press the MODE button to lock L4=l ( again. Each time you press the but the setting. STANDBY stops flashing. SCAN RECALL ton, the playing time reduces by 10 ) In a few seconds, the display reverts L=:JI minutes. to the clock mode and shows the DOWN UP current time. r I r I POWER To turn off the radio before it normal ly turns itself off, press the
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SPECIAL TUNING TECHNIQUES AND CONTROLS In addition to the standard tuning oper AM NARROW!WIDE USING HEADPHONES USING THE LOCK CONTROL ations described previously, use the SELECTIVITY SWITCH While not a control, you might consider Use this switch to prevent unauthorized following controls for special operations. using headphones to obtain the best use of the radio or to ensure that any Some stations transmit their signal so reception. Many stations broadcast station you might be monitoring remai
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SPECIAL SSB/CW RECEPTION TECHNIQUES Many stations transmit unmodulated Many stations transmit voice signals 4. Rotate the BFO PITCH control to the telegraph transmissions in the shortwave with a suppressed carrier in the single BFO PITCH RF GAIN midpoint. side band.(SSB),part of the radio trans band. To receive these special Morse '" code characters, the radio uses a mission spectrum that lies to the side special circuit, a beat-frequency oscill of the primary frequency signal. Amat 00 ator,
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4. Rotate the BFa PITCH control to the 8. Adjust the CW tone using the BFa RF GAIN BFO PITCH BFO PITCH RF GAIN LSB position for stations below 10 PITCH control. MHz or to the USB position for sta tions above 10MHz. {OO 0 0 lSB USB MIN MAX oe, '" ...., "" "" "f' 9. Reduce strong signals by using the 5. Rotate the RF GAIN control to the RF GAIN BFO PITCH BFO PITCH RF GAIN RF GAIN control. This also reduces MAX position. interference and noise. 0 0 OOJ oe, USB MIN , '" "" "" "in 6. Press the AM bu
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USING THE SHOULDER STRAP To Attach The Shoulder Strap 8. Rotate the BFO PITCH control to ad- BFO PITCH RF GAIN just the signal quality. 1. Insert about five inches of the end of the strap into the strap hanger. 0 0 co, ." ." , "" ... 2. Pull the free end of the strap upward, Figure 1 and insert the end into the lower 9. Rotate the RF GAIN control to edge of the strap buckle as shown BFC PITCH RF GAIN dampen strong signals. This dm im- in Figure 1. prove signal clarity as well. 0 0 co, ." ." "" ~
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CHOOSING AN ANTENNA • Use a combination TV/FM antenna. The radio uses a telescoping antenna specified band. The second chart gives Refer to the following charts. The first and an internal ferrite bar antenna for you the required length of wire to receive chart indicates the length of wire re Note reception of signals between 150 kHz quired for optimum performance on the the amateur radio operator's bands. eTo use an external antenna, and 1620 kHz. These antennas provide equipped with 300-ohm tw
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SYSTEM GROUNDING BAND ALLOCATION To ensure the best reception, always A suitable earth ground can be a clamp Note that broadcasts and hams share To avoid interference and confusion, connect a ground wire to the externai around a metal water pipe or a copper 7,100 -7,300 kHz, and interference is certain portions of the radio spectrum antenna jack. Connect the single wire rod driven several feet into the earth. heavy in that range. have been set aside for specific pur Radio Shack seils a copper g
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THE SHORTWAVE HOBBY Shortwave listening is a hobby with Ships and coastal stations can also be use Morse code (or CW, as they refer thousands of participants worldwide. heard on shortwave. Most communica to it) and SSB. The ham bands are While no special knowledge is required tions are in SSB and CWo One in divided up into CW and SSB sections for SWL, you will find your enjoyment teresting range is 2,000 - 2,300 kHz, in the following manner: increases with experience and special where the Coas
