Radio Shack DX-350 Manual de usuario

Cat. No. 20-209A

OWNER’S MANUAL

Please read before using this equipment.

DX-350

AM/FM/LW/SW1–9 12-Band

Portable Receiver

20-209A.fm Page 1 Wednesday, August 4, 1999 8:36 AM

RadioShack is a trademark used by Tandy Corporation.

INTRODUCTION

Your RadioShack DX-350 is a 12-Band Portable Receiver for AM

(MW), FM, long wave and worldwide shortwave broadcasts. Its

nine shortwave bands put the world at your fingertips, with interna-

tional broadcasts from Japan, Israel, England, Holland, Australia,

and other countries around the globe.

Because the receiver is so light and compact, you can carry it with

you wherever you go. You can power it from any of three sources:

internal batteries, standard AC, or vehicle battery power. To get the

most enjoyment from your receiver, take a few minutes to com-

pletely read this manual before using the DX-350.

FCC NOTICE

Your receiver might cause radio or TV interference, even when it is

operating properly. To determine whether or not your receiver is

causing the interference, turn off your receiver. If the interference

goes away, your receiver is causing the interference. Try to elimi-

nate the interference by:

• Moving your receiver away from another receiver

• Connecting your receiver to an outlet that is on a different elec-

trical circuit from the other receiver

• Contacting your local RadioShack store for help

If you cannot eliminate the interference, the FCC requires that you

stop using your receiver.

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CONTENTS

Choosing a Power Supply ......................................................... 4

Installing Batteries ................................................................. 4

Using Standard AC Power ..................................................... 5

Using a Vehicle Battery ......................................................... 6

Operation ..................................................................................... 7

Tuning the Receiver .............................................................. 7

Adjusting the Antennas ......................................................... 7

Using Headphones ................................................................ 8

Listening Safely .............................................................. 8

Traffic Safety .................................................................. 9

Listening Guide ......................................................................... 10

Band Allocation ................................................................... 10

Ham Radio Frequencies ............................................... 10

Time Standard Frequencies ......................................... 11

International Radio Stations ......................................... 11

Frequency Conversion ........................................................ 12

Care and Maintenance .............................................................. 13

Specifications ........................................................................... 15

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CHOOSING A POWER SUPPLY

You can power the receiver using either:

• Four AA batteries

• Standard AC power (with an optional AC adapter)

• 12-volt DC vehicle power (with an optional DC adapter)

INSTALLING BATTERIES

You need four AA batteries (not supplied) to power your receiver.

For the best results, we recommend alkaline batteries, such as Ra-

dioShack Cat. No. 23-552.

Cautions:

• Use only fresh batteries of the required size and recommended

type.

• Do not mix old and new batteries, different types of batteries

(standard, alkaline, or rechargeable), or rechargeable batteries

of different capacities.

Illus cover removal, battery installation, and

cover replacement

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1. Open the battery compartment by pushing the cover in the

direction of the arrow.

2. Install four AA batteries in the battery compartment as indi-

cated by the polarity symbols (+ and –) mark on the back of the

receiver. Place the batteries on top of the ribbon so you can

easily lift them out later.

3. Replace the cover.

USING STANDARD AC POWER

You can power the receiver from standard AC power with an AC

adapter (such as Cat. No. 273-1454, not supplied).

Insert the adapter’s small connector into the receiver’s DC 6V jack.

Then plug the adapter into a standard AC outlet. Internal batteries

automatically disconnect.

Caution: The recommended adapter supplies 6 volts DC and deliv-

ers at least 150 milliamps with its center tip set to negative. Using

an adapter that does not meet these specifications could damage

the receiver or the adapter.

Illustration of DC 6V jack

w/adapter cord to AC outlet

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USING A VEHICLE BATTERY

With a DC adapter (such as Cat. No. 14-844, not supplied), you can

operate the receiver in a car, boat, or recreational vehicle equipped

with a 12-volt DC, negative-ground electrical system.

Insert the adapter’s barrel plug into the receiver’s DC 6V jack. Set

the adapter’s 6V/9V selector to 6V. Then plug the other end of the

adapter into the vehicle’s cigarette-lighter socket. Internal batteries

automatically disconnect.

Cautions:

• The recommended adapter supplies 6 volts DC and delivers at

least 300 milliamps with its center tip set to negative. Using an

adapter that does not meet the specifications could damage

the receiver or the adapter.

• Do not let the adapter’s barrel plug contact any metal parts of

the vehicle when you plug the adapter into the lighter socket.

This can damage the adapter or the vehicle’s electrical system.

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OPERATION

TUNING THE RECEIVER

1. To turn on the receiver, press POWER.

2. Set SW/LW/AM/FM to the desired band. For shortwave, also set

SW BAND 1–9 to one of the bands from 1 to 9.

See “Listening Guide” on Page 10 for more information about

each band.

3. Adjust TUNING to tune to the desired station. The TUNING indi-

cator lights when a station is tuned properly.

4. Set VOLUME to a comfortable listening level.

ADJUSTING THE ANTENNAS

For the best reception, adjust the antenna according to this chart.

Band Frequency Range Antenna

AM 535–1705 kHz Internal — Rotate the re-

ceiver for the best reception

LW 150–281 kHz Internal — Rotate the re-

ceiver for the best reception

FM 87.5–108 MHz Telescoping — Extend fully

and swivel for the best re-

ception

SW 1–9 5.85–26.10 MHz Telescoping — Extend fully.

do not swivel

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USING HEADPHONES

Sometimes headphones can capture the subtle difference between

signals and the surrounding noise that often occurs at night. Be

sure that the headphones (not supplied) have a 1/8-inch plug. Insert

the plug into the jack on the left of the receiver. When you plug in

the headphones, the speaker is silenced. You will find a wide selec-

tion of headphones at your local RadioShack store.

Listening Safely

To protect your hearing, follow these guidelines when you use

headphones.

• Set the volume to the lowest setting before you begin listening.

After you begin listening, adjust the volume to a comfortable

level.

• Do not listen at extremely high volume levels. Extended high-

volume listening can lead to permanent hearing loss.

• Once you set the volume, do not increase it. Over time, your

ears adapt to the volume level, so a volume level that does not

cause discomfort might still damage your hearing.

Illustration of headphones jack location

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Traffic Safety

Do not use headphones with your receiver when operating a motor

vehicle or riding a bicycle in or near traffic. Doing so can create a

traffic hazard and could be illegal in some areas.

If you use headphones with your receiver while riding a bicycle, be

very careful. Do not listen to a continuous broadcast. Even though

some earphones/headphones let you hear some outside sounds

when listening at normal volume levels, they still can present a traf-

fic hazard.

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LISTENING GUIDE

Worldwide, there are thousands of shortwave listeners. The short-

wave hobby can be very exciting. Newscasts of a country where

important events are taking place give you a sense of immediacy

and participation that reports on local stations cannot deliver.

Being a shortwave listener requires no special knowledge. Random

tuning is a good way to become acquainted with various bands and

stations. But as you gain expertise, you will probably acquire spe-

cial listening techniques.

BAND ALLOCATION

Certain portions of the radio frequency spectrum are set aside for

specific purposes. Each range of frequencies is called a radio band.

See “Specifications” on Page 15 for the band frequencies. The fol-

lowing sections list some of the most interesting band allocations.

Ham Radio Frequencies

Ham radio operators often broadcast emergency information when

other means of communication break down. They use Morse code

(called continuous wave) and single sideband. The following chart

shows the continuous wave frequencies you can receive on the

DX-350. The DX-350 cannot receive single sideband signals.

3,500–3,800 kHz

7,000–7,150 kHz

14,000–14,200 kHz

21,000–21,250 kHz

28,000–28,500 kHz

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