Radio Shack DX 275 User manual

Radio Shack DX 375
Shortwave Radio
User Manual

DX-375 (200-0212) Features
Your Realisti DX-375 AM/SW/FM-Stereo PLL Synthesized Re eiver lets you
hoose from a wide variety of broad asts on FM, AM, and SW (shortwave)
bands. The 12 international SW bands let you tune in to the news and
other programs from su h sour es as the British Broad asting Corporation,
Radio Cairo, and Radio Mos ow, bring the voi es of the world to you. The
lightweight, ompa t re eiver lets you take it almost anywhere you go.
Its spe ial features in lude:
Phase-Locked Loop (PLL) - ensures a urate tuning.
Synthesized Receiver
Large, Fast-Response Display - shows the band, frequen y, wave length
(for SW), memory, battery, and other
indi ators.
Memory uning - stores up to 30 frequen ies in ea h band)
so you an easily tune to your favorite
stations.
Direct-Access uning - dire tly tunes to the desired frequen y
when you enter the frequen y on the keypad.
Search uning - sear hes up or down the band for the next
available station.
Memory Scan - s ans the stored frequen ies in ea h band's
memory.
LED uning Indicator - lights when the re eiver tunes to a signal.
Shortwave Quick Select - allows you qui k a ess to any of the 12
shortwave broad ast bands.
Key Lock - prevents you from a identally turning the
re eiver on or off, hanging the band or
frequen y, or hanging other front-panel
ontrols.
Sleep imer - lets you set the re eiver to turn off after
60 minutes so you an fall asleep as you
listen to the re eiver.
DX/Local Control - helps to redu e distortion of broad asts.
Headphone Jack - lets you onne t optional stereo headphones
so you an listen privately and hear FM
broad asts in stereo.
hree Power Options - let you power the re eiver with internal

batteries, standard household AC power
(using an optional AC adapter), or DC
vehi le battery power (using an optional DC
adapter).
one Control - lets you set the re eiver to a entuate
high or low frequen y sounds.
Memory Backup - keeps the programmed stations in your
re eiver's memory for up to 1 hour without
batteries.
Frequency Step Switch - lets you set the orre t frequen y step for
different ountries.
Folding Stand - se urely positions the re eiver at an
angle.
Be ause this produ t is so versatile, please take a few minutes to review
this manual before you pro eed.
LOCKING HE CON ROLS
The lo k feature prevents you from a identally turning the re eiver on or
off, hanging the band or frequen y, or hanging other front-panel
ontrols. You an still adjust VOLUME, TONE, and SENSITIVITY.
To lo k the ontrols, set LOCK/IN to IN. LOCK appears on the display.
To unlo k the ontrols, set LOCK/IN away from IN. LOCK disappears from
the display.
USING HE SLEEP IMER
The sleep timer sets the re eiver to turn off after 60 minutes so you an
fall asleep as you listen to the re eiver.
To use the sleep timer, press SLEEP. SLEEP appears on the display.
After 60 minutes, the re eiver turns off. To turn off the re eiver
sooner, press POWER.
USING HE SENSI IVI Y SWI CH
If you are listening to a strong FM, AM, or SW station, and the sound is
distorted, set SENS to LOCAL. For normal or weak stations, set SENS to DX
(distant).
(ALL-02/27/95)

DX-375 (200-0212) Installation
POWER SOURCES
You an power your re eiver from:
Internal battery power (two alkaline C batteries).
Standard household AC power (with an optional AC adapter).
Vehi le battery power (with an optional DC adapter).
Internal Battery Power
You an power the re eiver with two C batteries. For best performan e, we
re ommend alkaline batteries, su h as Radio Sha k Cat. No. 23-551.
CAUTION: If you dis onne t power from the re eiver for about 1 hour, all
information stored in memory will be lost. To keep the
frequen ies stored in memory, keep the batteries installed.
NOTES: Repla e the batteries when BATTERY appears on the display.
Before you repla e the batteries, be sure to turn off the
re eiver's power.
Follow these steps to install the batteries.
1. Push the over in the dire tion of the arrow and remove it from the
battery ompartment.
2. Remove the old batteries and dis ard them immediately.
WARNINGS: If you do not plan to use the re eiver for a month or more,
remove and store the batteries.
Never leave dead, old, or weak batteries in the re eiver. they
an leak hemi als and orrode or damage ele troni ir uits.
Always dispose of them promptly and properly.
Never in inerate batteries.
3. Pla e two C batteries in the ompartment as indi ated by the polarity
symbols (+ or -) marked beside the ompartment. For easy removal,
pla e the batteries on top of the lift-out ribbon.
CAUTIONS: Use only fresh batteries of the required size and type.
Never mix fresh and old batteries.
4. Repla e the ompartment over.

SE ING HE AM/FM UNING INCREMEN
The AM/FM frequen y in rement swit h sets the orre t frequen y in rements
for different ountries. The swit h is lo ated in the battery
ompartment.
Set the swit h using the following guidelines:
If you are in the United States, Canada, or another north or south
Ameri an ountry, the swit h is already set to B for you. In this
setting, the AM frequen y in rements are 10 KHZ and the FM frequen y
in rements are 200 kHz.
If you are in a ountry where the AM frequen y in rements are 9 kHz,
set the swit h to A. In this setting, the FM frequen y in rements are
100 kHz.
NOTE: All stored frequen ies erase when you hange the swit h position.
USING S EREO HEADPHONES
For private listening, onne t optional stereo headphones into the
re eiver's 1/8-in h ja k. This dis onne ts the re eiver's internal
speaker. Your lo al Radio Sha k store offers a wide sele tion of stereo
headphones with the required 1/8-in h plug.
Listening Safely
Do not listen at extremely high volume levels, espe ially using an
earphone. Extended, high-volume listening an lead to permanent hearing
loss.
To prote t your hearing, follow these guidelines when you use headphones.
Always start by setting the volume to the lowest level possible before
you begin listening. Put the earphone or headphones on, then
gradually in rease the volume as ne essary.
On e you set the volume, do not in rease it. Over a period of time,
your ears adapt to the volume level, so a volume level that does not
ause dis omfort might still damage your hearing.
USING HE FOLDING S AND
Your re eiver has a folding stand on the ba k. Use it to position the
re eiver more se urely and for easier viewing of the display.
(ALL-02/27/95)

DX-375 (200-0212) Alternate Power Sources
S ANDARD AC POWER
To power your re eiver from an AC outlet, you need an AC adapter (su h as
Cat. No. 273-1654).
CAUTIONS: You must use an AC adapter that supplies 3 volts DC power and
delivers at least 300 milliamps. Its enter tip must be set to
negative, and it must have a plug that properly fits your
re eiver's DC 3V ja k. Using an adapter that does not meet
these spe ifi ations ould damage your re eiver or the adapter.
If you dis onne t power from the re eiver for about 1 hour, all
information stored in memory will be lost. We re ommend you
keep the batteries installed when you use the AC adapter to
prote t the memory from a power loss.
Follow these steps to power the re eiver AC power.
1. Set the adapter's voltage swit h to 3V.
2. Conne t the adapter's bla k barrel plug to the adapter's ord with the
TIP set to -NEG.
3. Insert the barrel plug into the re eiver's DC 3V ja k. This
dis onne ts the internal batteries.
4. Plug the adapter into a standard AC outlet.
VEHICLE BA ERY POWER
To power your re eiver from a vehi le's battery power, you need a DC
adapter (su h as Cat. No. 270-1560A).
CAUTIONS: The vehi le must have a 12-volt, negative-ground ele tri al
system.
You must use a DC adapter that supplies 3 volts DC adapter that
supplies 3 volts DC power and delivers at least 300 milliamps.
Its enter tip must be set to negative, and it must be set to
negative, and it must have a plug that properly fits your
re eiver's DC 3V ja k. Using an adapter that does not meet
these spe ifi ations ould damage your re eiver or the adapter.
Plug the adapter into your re eiver before you plug it into the
igarette-lighter so ket. Also, unplug the adapter from the
igarette-lighter so ket before you unplug it from your
re eiver. An un onne ted plug might tou h a metal obje t and
damage the adapter or your vehi le's ele tri al system.
Follow these steps to power your re eiver from your vehi le's battery

power.
1. Set the adapter's voltage swit h to 3V.
2. Conne t the adapter's orange barrel-plug to the adapter's ord with
TIP set to -NEG.
3. Insert the adapter's barrel plug into the re eiver's DC 3V ja k. this
dis onne ts the internal batteries.
4. Plug the other end of the adapter into your vehi le's igarette-
lighter so ket.
(ALL-12/12/94)

DX-375 (200-0212) Operation
Follow these steps to listen to the re eiver.
WARNING: To prevent possible ear injury and hearing loss, set VOLUME to
MIN before you turn on the re eiver. After you turn on the
re eiver, set VOLUME to a omfortable listening level.
1. Press POWER to turn on the re eiver.
2. Press BAND until the desired band (FM, AM, or SW) appears on the
display. (See "Sele ting the Band.")
3. Press MANUAL/AUTO or PRESET/DIRECT ACCESS to tune to the desired
station. (See "Tuning to a Radio Station.")
4. Adjust your re eiver's antenna for the best re eption. (See "Using
the Antenna.").
5. Adjust VOLUME and TONE as desired.
6. Press POWER to turn off the re eiver.
SELEC ING HE BAND
You an sele t the Frequen y Modulation (FM), Amplitude Modulation (AM),
or the 12-band Shortwave (SW) band of operation.
Press BAND until the desired band (FM, AM, or SW) appears on the display.
If you sele t FM, FM, MHz and STEREO (when you tune to a stereo
broad ast) appear on the display.
NOTE: Your re eiver has only one speaker. To listen to a stereo
broad ast, use stereo headphones (not supplied).
If you sele t AM, AM and kHz appear on the display.
If you sele t SW, press SW SELECT to a ess the international radio
frequen y bands. As you press SW SELECT, SW BROADCAST BAND and the
lower end of ea h broad ast band appear on the display.
NOTE: If you press and hold SW SELECT for more than 2 se onds, the
re eiver automati ally s ans all broad ast bands in sequen e and
stops on the same band where you were when you pressed SW SELECT.
To stop the s anning at a desired band, press SW SELECT again or press <DOWN
or UP>.
UNING O A RADIO S A ION
You an tune to a desired broad ast station using the manual, sear h,

dire t a ess, preset, or s an tuning methods.
Manual Tuning
To manually tune to a frequen y, repeatedly press MANUAL/AUTO <DOWN or UP>
until the display shows the frequen y desired.
Search Tuning
To let the re eiver find a station, press and hold <DOWN or UP> for more
than 2 se onds. The tuner qui kly s ans all frequen ies. When you
release the button, the re eiver automati ally tunes to the next strong
station.
Direct Access Tuning
To tune dire tly to a station's frequen y, press ENTER. ENTRY flashes for
about 10 se onds. While it is flashing, press the number buttons to
sele t the desired station's frequen y. Then press ENTER again.
NOTES: Your re eiver automati ally rounds the entered frequen y to the
nearest valid frequen y. For example, if you try to enter a
frequen y of 1453 in AM, your re eiver a epts it as 1450.
If you make a mistake in entering a frequen y, ERROR flashes on
the display. Enter the frequen y again.
Preset Tuning
To tune dire tly to a station that is entered into memory, simply press
the desired preset number (0-9).
NOTE: You must first store the desired stations into memory. (See
"Storing Station Frequen ies.")
Scan Tuning
To s an the preset memory lo ations, press SCAN. The re eiver stops at
ea h station for about 5 se onds. To end s anning, press SCAN again, or
press a preset station memory button.
NOTE: If no frequen y is stored in a memory hannel or no signal is
re eived at a memory hannel, the re eiver stops at the memory
hannel for 1 se ond and then moves to the next memory hannel.
S ORING S A ION FREQUENCIES
For easy sele tion, you an store up to 30 of your favorite stations'
frequen ies in memory (10 frequen ies in ea h band; FM, AM, and SW). On e
you store a station's frequen y using a memory button, you an press this
button to sele t the stored station.

CAUTION: If you dis onne t power from the re eiver for about 1 hour, all
information stored in memory will be lost. We re ommend you
keep the batteries installed when you use an AC or DC adapter to
prote t the memory from a power loss.
Follow these steps to store a frequen y in memory.
1. Follow Steps 1 through 4 in "Basi Operation."
NOTE: Use manual, sear h, or dire t a ess tuning to tune to the
station's frequen y you want to store.
2. Press STORE. MEMORY flashes.
3. While MEMORY flashes, press a number button to sele t the memory
lo ation.
NOTE: If you do not press a number within about 10 se onds, MEMORY stops
flashing and you must repeat steps 2 and 3.
USING HE AN ENNA
Use the following guidelines to adjust your re eiver's antenna.
BAND Wavelength Antenna adjustments
FM Fully extend and rotate the teles oping antenna.
AM Rotate the re eiver for best re eption, (AM uses
an internal antenna.)
SW 13-41 meters Fully extend the teles oping antenna verti ally.
SW 49-120 meters Fully extend the teles oping antenna and/or
rotate the re eiver for best re eption. (Both
internal and external teles oping antennas pi k
up signals.)
NOTE: For better AM and SW re eption, you an onne t an external
antenna, su h as Cat. No. 278-1374, to the teles oping antenna.
(ALL-02/27/95)