Radio Shack Stereo Receiver DX 350 User Guide

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Cat. No.  
20-209A  
OWNER’S MANUAL  
Please read before using this equipment.  
DX-350  
AM/FM/LW/SW1–9 12-Band  
Portable 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.  
Illustration of DC 6V jack  
w/adapter cord to AC outlet  
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.  
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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  
POWER  
1. To turn on the receiver, press  
SW/LW/AM/FM  
.
2. Set  
SW BAND 1–9  
to the desired band. For shortwave, also set  
to one of the bands from 1 to 9.  
See “Listening Guide” on Page 10 for more information about  
each band.  
TUNING  
3. Adjust  
to tune to the desired station. The TUNING indi-  
cator lights when a station is tuned properly.  
VOLUME  
4. Set  
to a comfortable listening level.  
ADJUSTING THE ANTENNAS  
For the best reception, adjust the antenna according to this chart.  
Band  
AM  
Frequency  
Range  
Antenna  
535–1705  
kHz  
Internal — Rotate the re-  
ceiver for the best reception  
LW  
FM  
150–281  
87.5–108  
kHz  
Internal — Rotate the re-  
ceiver for the best reception  
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.  
Illustration of headphones jack location  
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.  
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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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Time Standard Frequencies  
The National Bureau of Standards operates station WWV in Fort  
Collins, Colorado, on 2.500, 5.000, 10.000, 15.000, and 20.000  
MHz. These stations broadcast the exact time of day at specified  
intervals.  
You can pick up Canada’s station CHU on 7.335 MHz.  
You can pick up Australia’s station VNG on 12.000 MHz.  
International Radio Stations  
International commercial broadcasts are found in several bands.  
You can hear these most often during the evening hours between  
6:00 PM and midnight (your time). Programming (often in English)  
usually contains news, commentaries, music, and special features  
reflecting the culture of the specific country.  
European stations often list a frequency by giving its wavelength.  
For example, you might hear “the 19-meter band.” (See “Frequency  
Conversion” on Page 12.)  
Notes:  
• The following table shows some of the most popular bands.  
Band (in meters) Frequency Range (in MHz)  
49  
*41  
31  
5.950–6.200  
7.100–7.30  
9.400–9.900  
11.600–12.100  
15.100–15.800  
25  
19  
11  
 
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Band (in meters) Frequency Range (in MHz)  
16  
13  
11  
17.480–17.900  
21.450–21.850  
25.670–26.100  
* The 41-meter band is shared by ham operators in the Unit-  
ed States and international stations.  
• Stations can change frequencies. For an up-to-date listing, see  
RadioShack’s Listening to Short Wave (Cat. No. 62-1021) or  
other popular communications magazines.  
FREQUENCY CONVERSION  
The location of a station can be expressed in frequency (kHz or  
MHz) or in wavelength (meters). To find your way around interna-  
tional broadcasts, it is helpful to be able to convert frequencies from  
MHz to kHz, kHz to MHz, and MHz to meters.  
1 MHz (million) = 1,000 kHz (thousand)  
To convert MHz to kHz, multiple by 1,000. For example:  
9.62 MHz × 1,000 = 9620 kHz  
To convert from kHz to MHz, divide by 1,000. For example:  
2780 kHz/1,000 = 2.780 MHz  
To convert from MHz to meters, divide 300 by the number of MHz.  
For example:  
300/7.1 MHz = 42.25 meters.  
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CARE AND MAINTENANCE  
Your DX-350 is an example of superior design and craftsmanship.  
The following suggestions will help you care for the DX-350 so you  
can enjoy it for years.  
Keep the DX-350 dry. If it gets wet, wipe it dry im-  
mediately. Liquids might contain minerals that can  
corrode the electronic circuits.  
Use and store the DX-350 only in normal tempera-  
ture environments. High temperatures can shorten  
the life of electronic devices, damage batteries, and  
distort or melt plastic parts.  
Handle the DX-350 gently and carefully. Dropping it  
can damage circuit boards and cases and can  
cause the DX-350 to work improperly.  
Keep the DX-350 away from dust and dirt, which  
can cause premature wear of parts.  
Wipe the DX-350 with a dampened cloth occasion-  
ally to keep it looking new. Do not use harsh chem-  
icals, cleaning solvents, or strong detergents to  
clean the DX-350.  
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Use only fresh batteries of the recommended size  
and type. Always remove old or weak batteries.  
They can leak chemicals that destroy electronic cir-  
cuits.  
Modifying or tampering with the DX-350’s internal components can  
cause a malfunction and might invalidate the it’s warranty and void  
your FCC authorization to use it. If your DX-350 is not performing  
as it should, take it to your local RadioShack store for assistance.  
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SPECIFICATIONS  
Power Supply ............................................................ 4 AA batteries  
AC/DC adapter 6V 150 mA center negative  
Frequency Ranges:  
FM .................................................................... 87.5–108 MHz  
AM .................................................................... 530–1710 kHz  
LW ...................................................................... 150–281 kHz  
SW1 (49 m) ..................................................... 5.90–6.20 MHz  
SW2 (41 m) ..................................................... 7.10–7.35 MHz  
SW3 (31 m) ..................................................... 9.40–9.90 MHz  
SW4 (25 m) ................................................. 11.60–12.10 MHz  
SW5 (21 m) ................................................. 13.57–13.87 MHz  
SW6 (19 m) ................................................. 15.10–15.80 MHz  
SW7 (16 m) ................................................. 17.48–17.90 MHz  
SW8 (13 m) ................................................. 21.45–21.85 MHz  
SW9 (11 m) .................................................. 25.67–26.10 MHz  
Sensitivity: ........................................ Max for 50 mW output 8 Ohm  
631 µV at 1,000 kHz  
Usable sensitivity for 20 dB S/N 1,000 µV at 1,000 kHz  
Speaker ................................................. 2.5 Inch, 8 Ohm, 0.5 Watt  
.......  
Output Power  
200 mW 8 Ohm (10% THD) for built-in speaker  
10 mW per channel for headphones  
................................................  
Headphones Jack  
3.5 mm, 32 Ohm  
Dimensions (HWD) ............................................ 4 × 7 × 11/2 Inches  
(105 × 176 x 39 mm)  
Weight (without batteries) ...................................................... 14 oz  
(400 g)  
Specifications are typical; individual units might vary. Specifications  
are subject to change and improvement without notice.  
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Limited Ninety-Day Warranty  
This product is warranted by RadioShack against manufacturing defects in mate-  
rial and workmanship under normal use for ninety (90) days from the date of pur-  
chase from RadioShack company-owned stores and authorized RadioShack  
franchisees and dealers. EXCEPT AS PROVIDED HEREIN, RadioShack MAKES  
NO EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES, INCLUDING  
THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PUR-  
POSE, ARE LIMITED IN DURATION TO THE DURATION OF THE WRITTEN LIM-  
ITED WARRANTIES CONTAINED HEREIN. EXCEPT AS PROVIDED HEREIN,  
RadioShack SHALL HAVE NO LIABILITY OR RESPONSIBILITY TO CUSTOMER  
OR ANY OTHER PERSON OR ENTITY WITH RESPECT TO ANY LIABILITY,  
LOSS OR DAMAGE CAUSED DIRECTLY OR INDIRECTLY BY USE OR PER-  
FORMANCE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS  
WARRANTY, INCLUDING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING  
FROM INCONVENIENCE, LOSS OF TIME, DATA, PROPERTY, REVENUE, OR  
PROFIT OR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL  
DAMAGES, EVEN IF RadioShack HAS BEEN ADVISED OF THE POSSIBILITY  
OF SUCH DAMAGES.  
Some states do not allow the limitations on how long an implied warranty lasts or  
the exclusion of incidental or consequential damages, so the above limitations or  
exclusions may not apply to you.  
In the event of a product defect during the warranty period, take the product and  
the RadioShack sales receipt as proof of purchase date to any RadioShack store.  
RadioShack will, at its option, unless otherwise provided by law: (a) correct the de-  
fect by product repair without charge for parts and labor; (b) replace the product  
with one of the same or similar design; or (c) refund the purchase price. All re-  
placed parts and products, and products on which a refund is made, become the  
property of RadioShack. New or reconditioned parts and products may be used in  
the performance of warranty service. Repaired or replaced parts and products are  
warranted for the remainder of the original warranty period. You will be charged for  
repair or replacement of the product made after the expiration of the warranty pe-  
riod.  
This warranty does not cover: (a) damage or failure caused by or attributable to  
acts of God, abuse, accident, misuse, improper or abnormal usage, failure to follow  
instructions, improper installation or maintenance, alteration, lightning or other inci-  
dence of excess voltage or current; (b) any repairs other than those provided by a  
RadioShack Authorized Service Facility; (c) consumables such as fuses or batter-  
ies; (d) cosmetic damage; (e) transportation, shipping or insurance costs; or (f)  
costs of product removal, installation, set-up service adjustment or reinstallation.  
This warranty gives you specific legal rights, and you may also have other rights  
which vary from state to state.  
RadioShack Customer Relations, Dept. W, 100 Throckmorton St., Suite 600,  
Fort Worth, TX 76102  
We Service What We Sell  
3/97  
RadioShack  
A Division of Tandy Corporation  
Fort Worth, Texas 76102  
4A7  
Printed in Taiwan  
 

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