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Bedienungsanleitung Realistic DX-440

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  • Realistic DX-440 - page 1

    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 Ra ...

  • Realistic DX-440 - page 2

    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 34 System Grounding 36 Band Allocation 37 The Shortwave ...

  • Realistic DX-440 - page 3

    FEATURES CONTROL LOCATIONS • 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 Acc~ss 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 ...

  • Realistic DX-440 - page 4

    CHOOSING A POWER SUPPLY 32. Folding Stand 33. EXTernal Antenna'Jack 34. EXTernal/INTernal Antenna Selector 35. Battery Compartment 36. 9k/10kHz Step SWitch (beneath batteries) 37. Battery Removal Strap You can operate the DX-440 using: • Six alkaline D batteries and two AA batteries. that you can lift them easily for replacement.) Note: Befo ...

  • Realistic DX-440 - page 5

    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. 4. Insert the bottom projections on the edge of the battery compartment cover inside the lower edge of the compartment opening. Lower the co ...

  • Realistic DX-440 - page 6

    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 radio uses 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 AAbatteries the display does not show C ...

  • Realistic DX-440 - page 7

    TUNING THE RADIO Band Frequency Service (Button) Min Max FM 87.5 108 MHz Normal FM broadcasts AM 150 29999 kHz Entire AM Band LW 150 281 kHz Longwave MW 520 1620 kHz Normal AM broadcasts SW 2300 26100 kHz Shortwave in 12 sub-bands 1 . Press the POWER button. The POWER indicator lights. The display I I POWER shows the last band and frequency you sel ...

  • Realistic DX-440 - page 8

    You can select a frequency using four tuning methods: • Direct Tuning • Manual Tuning • Scan Tuning • Memory Tuning DIRECT TUNING 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. ODD 4 5 6 DOD 7 , 8 9 DOD a/SE ...

  • Realistic DX-440 - page 9

    6. Adjust the VOLUME and TREBLE/ MINI III IIII I I lMAX VOLUME BASS tone controls for the desired ... ~ sound level. LIIIIIIIIIIIR BALANCE ~ LO I II IIII II 11 HI TREBLE ... ~ LO I I I I II I I I I t HI BASS ... c:::ElffiIII!ll Note: If you select the FM band and ,FM, ~ LOCK tune to an FM stereo station, move the MONO STEREO BFO .. FM mode switch t ...

  • Realistic DX-440 - page 10

    POWER FM AM LW MW SW 00000 ~ FM 1. Turn on the radio. 2. Select a band. 3. Adjust the antenna or radio position according to the chosen band. SCAN TUNING Use scan tuning to quickly locate a sta- tion or to monitor several stations within a band. MINI IIIII III I IMAX VOLUME CTIlIIIIlllICJ LIIII111111IR BALANCE c:::E:IillIIIII LOIIIIIIIIIII>!1 TR ...

  • Realistic DX-440 - page 11

    UP STORE RECALL 5. Press the SCAN button again to resume upward scanning. When the radio reaches the upper frequency limit of the band, it continues scan- ning starting again at the lowest fre- quency on the band. 6. You can fine tune the station using the UP or DOWN buttons. Tune so that the most SIGNAL indicators light for best reception. 7. Adju ...

  • Realistic DX-440 - page 12

    CLOCK RADIO OPERATION MODE STORE C ct=J SCAN RECALL ) I DOWN UP L_J[~~ SCAN RECALL ~~)(L.- __ WW MODE STORE '----~) (L.-_~ LIIIIIIIIIIIR BALANCE c:::E:mIIJllCJ LOIIIIIIIIIIIHI TREBLE c:::E:mIIJllCJ LOIIIIIIIIIIIHI BASS c:::E:mIIJllCJ LIGHT TIMER SLEEP turns itself off after an interval between 10 and 90 minutes. Make the following settings wit ...

  • Realistic DX-440 - page 13

    4. When you reach the desired turn on MODE STORE time, press the MODE button to lock L4=l ( ) the setting. STANDBY stops flashing. SCAN RECALL In a few seconds, the display reverts L=:JI ) to the clock mode and shows the DOWN UP current time. r I r I 5. Press the TIMER button once. LIGHT TIMER SLEEP STANDBY disappears. I[~::J]I 6. To check the dail ...

  • Realistic DX-440 - page 14

    SPECIAL TUNING TECHNIQUES AND CONTROLS BFO PITCH RF GAIN RF GAIN CONTROL "- LOCK r FM , MONO STEREO BFO • • • • • • • • WIDE NARROW OUT IN OUT IN LAM..J USING THE LOCK CONTROL 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, ...

  • Realistic DX-440 - page 15

    SPECIAL SSB/CW RECEPTION TECHNIQUES RF GAIN RF GAIN BFO PITCH '" BFO PITCH USB MIN 00 i' ODD 4 5 6 CJ CJ CJ 7 8 9 CJ CJ CJ O/SEC EXECUTE CJ ( 1 FM AM LW MW SW 00000 i' LIIIIIIIIIIIR BALANCE ~ LOIIIIIIIIIIIHI TREBLE ~ 5. Rotate the RF GAIN control to the MAX position 7. Tune in the CW station using the tuning knob, or enter the f ...

  • Realistic DX-440 - page 16

    USB MIN BFO PITCH RF GAIN OOJ {OO lSB USB MIN MAX 8. Adjust the CW tone using the BFa PITCH control. BFO PITCH RF GAIN 0 0 '" oe, "" "" ...., "f' 9. Reduce strong signals by using the BFO PITCH RF GAIN RF GAIN control. This also reduces 0 0 interference and noise. '" oe, "" "" &q ...

  • Realistic DX-440 - page 17

    USING THE SHOULDER STRAP Figure 3 Figure 1 ------, Figure 2 More than 3·· __ i -T More than 2'" To Attach The Shoulder Strap 2. 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. 4. Pull the free end taught. Be sure that at least two inches of strap extend from the upp ...

  • Realistic DX-440 - page 18

    CHOOSING AN ANTENNA To calcuate antenna length for a specific frequency Refer to the following charts. The first chart indicates the length of wire re- quired for optimum performance on the Wave Length - Ham Band 160 meter 80 meter 40 meter 20 meter 15 meter = 30 1/2 feet specified band. The second chart gives you the required length of wire to rec ...

  • Realistic DX-440 - page 19

    SYSTEM GROUNDING To ensure the best reception, always connect a ground wire to the externai antenna jack. Connect the single wire lead-in to the center terminal of the RCA plug. Connect.a 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 ...

  • Realistic DX-440 - page 20

    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 ...

  • Realistic DX-440 - page 21

    LISTENING NOTES FREQUENCY CONVERSION Kilohertz: Thousands-of-hertz·A kilohertz is 1,000 hertz. We use the abbreviation kHz. Kilo means thousand. 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. Your communications receiver is calibrated in Megah ...

  • Realistic DX-440 - page 22

    COUNTRY LOG Programs in Japanese Programs in Albanian Programs in French Programs in Spanish Programs in Spanish Programs in Spanish Programs in Portuguese Programs in Spanish Programs in French REMARKS Programs in Portuguese Religious Programs Puerto Limon, Costa Rica Montreal, Canada Neiva, Colombia Programs in Spanish Bogota, Colombia Programs i ...

  • Realistic DX-440 - page 23

    Programs in Spanish Programs in Urdu Programs in Arabic Programs in Farsi Rabat, Morocco London, England Johannesburg, South Africa Vatican City Vienna, Austria Jerusalem, Israel Melborne, Australia Jerusalem, Israel Paris, France Tokyo, Japan Melbourne, Australia London, England Mexico City, Mexico Islamad, Pakistan Paris, France Tehran, Iran Mosc ...

  • Realistic DX-440 - page 24

    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 ...

  • Realistic DX-440 - page 25

    CARE AND MAINTENANCE 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 electron'lc circuits. Use and store the produ ...

  • Realistic DX-440 - page 26

    SPECIFICATIONS Semi conductors: Circuit: FM AM(LW,MW,SW) Frequency range: FM: AM: LW: MW: SW: Antennas: LW/MW SW FM Output: 50 1 pc. LSI 7 pes. les 8 pes. FETs 44 pes. Transistors 59 pes. Diodes 7 pes. LEDs superheterodyne Dual conversion superheterodyne 87.5MHz - 108MHz 150 kHz - 29999 kHz 150kHz - 281 kHz 520kHz - 1620kHz divided into 12 shortwav ...

  • Realistic DX-440 - page 27

    ADDENDUM DX-440 AM/FM DIRECT ENTRY COMMUNICATIONS RECEIVER Cat. No. 20-221A 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 MV/m 300 kHz 560 MV/m 600 kHz 320 MV/m 1.4 MHz 280 MV/m 3.1 MHz 4 MV 7.1 MHz 4 MV 15.1 MHz 4 MV 2 ...

  • Realistic DX-440 - page 28

    Image Rejection Ratio: AM/SSB 150 kHz 48 dB 300 kHz 65 dB 600 kHz 65 dB 1.4 MHz 60 dB 31 MHz 60 dB 7.1 MHz 60 dB 151 MHz 60 dB 28.1 MHz 60 dB FM 875 to 108 MHz 40 dB Selectivity: AM/SSB Wide Narrow IF AM/SSB/CW 1st 2nd FM Frequency Stability: - 6dB ± 3 ± 2 55.845 450 107 - 50dB ± 7 kHz ± 4 kHz MHz kHz MHz Within 1 kHz per hour after 60 minutes ...

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