DX-440 AM/FM Direct Entry Communications Receiver
(200-0221) Preparation Faxback Doc. # 17501
CHOOSING A POWER SUPPLY
You can operate the 440-DX using:
Six alkaline D batteries and two AA batteries
Household AC (with an optional AC adapter)
A 12-Volt DC automotive battery (with an optional DC adapter)
INSTALLING BATTERIES
1. Press the latch on the battery compartment cover in the direction of
the OPEN label, and lift the cover off.
2. Insert two AA alkaline batteries ( such as Radio Shack Cat. No. 23-
552 ) in the smaller battery chamber within the main compartment.
Position them as illustrated on the back of the radio.
(Place these batteries and the next set of batteries on top of their
respective battery removal ribbons so that you can lift them easily
for replacement.)
NOTE: Before installing the next set of batteries, verify that the
frequency step selector switch is set to the position correct for
your country. In the USA, move the switch to the 10K position. In
other countries, set it to 9K.
3. Insert six D batteries in the main battery 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. 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
cover, and snap the top latch down until it clicks closed.
USING HOUSEHOLD AC
You can power the DX-440 from household AC by using the optional AC
adapter, Cat. No. 273-1455. Plug the small connector of the adapter into
the DC IN 9V socket on the side of the unit. plug the adapter into a
standard household outlet.
NOTE: When you use AC, the DX-440 automatically disconnects the internal
batteries.
USING AN AUTOMOTIVE BATTERY
You can operate the DX-440 in a car. boat, or recreational vehicle that is
equipped with a 12 Volt DC negative ground battery. Use a DC adapter (Cat.
No. 14-844).
Insert the adapter plug into the jack marked DC IN 9V on the side of the
DX-440. Plug the other end of the adapter into the lighter socket of the
vehicle.
NOTE: When you connect the adapter, the DX-440 automatically disconnects
the internal batteries.
CAUTION: Do not let the adapter's barrel plug contact any metal parts of
the vehicle when the adapter is plugged into the lighter socket
of the of the vehicle but not yet plugged into the DX-440. A
harmful short can occur that can damage the adapter or the
vehicle's electrical system.
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 operation. The radio uses the 24-hour
mode because most shortwave stations schedule their broadcast on the bases
of Greenwich Mean Time which is a 24-hour clock.
The clock starts when you install the two AA batteries. The display shows
CLOCK 0:00.
1. Press the MODE button.
2. Press the STORE button. CLOCK flashes in the display for five seconds.
3. During this period press the UP or DOWN buttons to reach the correct
time in hours and in minutes (or, rotate the tuning knob to quickly
reach the setting).
NOTE: Digit of time can be adjusted only when "CLOCK" is flashing in
the display.
4. Press the O/SEC button. The display shows the minutes and the seconds
setting. Press the STORE button to reset the seconds to 00 and the
display, return to hours and minutes.
NOTE: When "CLOCK" is flashing, O/SEC button does not function.
SELECTING A BAND AND TURNING ON POWER
The radio has five band select buttons beneath the EXECUTE button.
BAND FREQUENCY SERVICE
(Button) Min Max
FM 87.5 108 MHz Normal FM broadcast
AM 150 29999 kHz Entire AM Band
LW 150 281 kHz Longwave
MW 520 1620 kHz Normal AM broadcast
SW 2300 26100kHz Shortwave in 12
sub-bands
NOTE: Each time you select SW, the radio steps through 12 sub-bands, each
band covering as little as 100 kHz to as much as 500 kHz. The sub-
bands correspond to the wavelengths of each band. Refer to "The
Shortwave Hobby" section for additional information.
1. Press the POWER button. The POWER indicator lights. The display
shows the band you selected and a random frequency within that band.
2. Press the band button of your choice. The display shows the band you
selected and the a random frequency within that band.
TUNING THE RADIO
ADJUSTING THE ANTENNA
Locate the band to which you want to listen in the following chart. Adjust
the antenna as indicated.
BAND FREQUENCY RANGE ANTENNA
MW 520 - 1620 kHz Internal - Rotate radio for best
reception
LW 150 - 281 kHz Internal - Rotate radio for best
reception
FM 87.5 - 108 MHz Telescopic - Extend fully
Swivel for best results
AM/SW 2300 - 26100 kHz Telescopic - Extend fully
Do not swivel
You can select a frequency using four tuning methods:
Direct Tuning
Manual Tuning
Scan Tuning
Memory Tuning
DIRECT TUNING
You can "key" 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.
Example: To tune to 7305 kHz on the AM band
1. Press the POWER button to turn on the radio.
2. Press the AM band button.
3. Press [7], [3], [0], [5]. As you press each button, the LCD shows the
number
4. Press the EXECUTE button within five seconds. The display shows the
frequency and the meter band of SW.
5. Extend the antenna fully straight up for the best AM (SW) reception.
6. Adjust the VOLUME and TREBLE/BASS tone controls for the best sound
level.
NOTE: If you select the FM band and tune to a FM stereo station, move
the FM mode switch to STEREO and adjust the BALANCE control for the
best stereo headphone reproduction. The built in speaker is
monaural. For the best sound result when listening with the built
in speaker, do not forget to return the BALANCE control to the mid
position.
CONTINUOUS TUNING
If you do not know the exact frequency of the station you want to listen
to, you can check the broadcast on a band using the UP/DOWN buttons or
the tuning knob.
1. a. Press the power button to turn on the radio
2. Select a band.
3. Repeatedly press the UP or DOWN button until you reach a station
you want to listen to. Press and hold the UP or DOWN buttons to
rapidly change frequency
or
b. Rotate the tuning knob in either direction until you reach a
desired frequency or station with all five SIGNAL indicators
light to obtain best reception.
NOTE: When you repeatedly press an UP or DOWN button, the frequency on the
FM band changes by .05 MHz each time you press a button. On all
other bands, the frequency changes by 1kHz.
When you turn the TUNING knob slowly in the AM band, the display changes in
1 kHz increments. Slightly faster turning of the knob causes the display
to change in 10 kHz increments and very fast turning of the knob causes
changes in 100 kHz increments. Turn the knob quickly until the display
nears the desired frequency. Then turn it slowly for precise tuning.
4. Adjust the VOLUME, TREBLE, BASS and BALANCE
SCAN TUNING
Use scan tuning to quickly locate a station or to monitor several stations
within a band.
1. Turn on the radio.
2. Select a band.
3. Adjust the antenna or radio position according to the chosen band.
4. Press the SCAN button. The radio begins to scan the frequencies
in the band, from lowest to highest. It stops when it reaches a
station. The signal strength of the station registers on the SIGNAL
indicators. When all five indicators light, SIGNAL is best.
5. Press the SCAN button again to resume upward scanning. When the radio
reaches the upper frequency limit of the band, it continues scanning
starting again at the lowest frequency on the band.
6. You can fine tune the station using the UP or DOWN buttons. Tune so
that most SIGNAL indicators light for best reception.
7. Adjust the VOLUME/TREBLE/BASS and BALANCE controls.
MEMORY TUNING
You can store up to nine different frequencies and have them available
for instant selection.
To Store a Frequency
1. Turn on the radio
2. Tune to any frequency using any of the previously mentioned techniques.
3. Press the STORE button. The word STORE flashes on the display for
five seconds. During this period, press one of the nine number
buttons. The display shows the storage number you selected and stores
the chosen station in that memory location.
NOTE: You do not have to store your first station as location 1. You can
choose any location as your first chose.
To Recall a Frequency
1. Turn on the radio.
2. Press the recall button. The display flashes MEMO for five seconds.
3. During this time, press the storage number button for the desired
station. The radio instantly tunes to that station and displays the
frequency and storage number.
NOTE: If you make no selection while STORE or MEMO flashes, the radio
returns to the normal playing mode.
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