Galaxy DX 2517 User manual

DX 2517
AM·FM·SSB·CW·PA
Amateur Base Station Transceiver
OWNER’S MANUAL
SWR
CHANNEL
RX / TX
POWER
MICROPHONE
OFF
ON +10KHz
MIC RF
NORMAL
CALIBRATE
CAL
OFF
OFF
T.B. DIM
OFF
WATTS
NB / ANLSWR
2
1
3
0
6
2
4
R.BEEP
SET
8
10
12
22
TIME ECHO
OFF
OFF
NF
dB
OVER
90
N
O
SIGNAL
+20
80
20
30
60
70
40
50
I
T
L
U
A
O
M
D
1
0
10
5
9
7
3
100
9
+60
+40
RF POWER
SQUELCHBAND
A
C
B
F
D
E
USB
MODE
USB
FM AM
PA
PA AMFM
LSB
CW
CWLSB
VOLUME FINE COARSE PHONE
2517

- 1 -
TABLE OF CONTENTS
SPECIFICATIONS ............................................................. 2
INSTALLATION ................................................................ 3
OPERATION
Introduction .................................................................... 6
Control & Connections …………………………………… 6
Rear Panel Connectors …………………………………... 10
Microphone ………………………………………………… 11
Operation …………………………………………………... 11
- 2 -
SPECIFICATION :
GENERAL
Frequency Range 28.765 – 29.205 MHz
Emission Types CW, FM, AM, USB, LSB
Frequency Control Phase-Lock-Loop Synthesizer
Frequency Tolerance 0.005%
Frequency Stability 0.003%
Temperature Range -30OC to +55OC
Antenna Impedance 50 Ohms
Antenna Connectors Standard SO-239 Type
Meter Function Meter #1 : RF Output Power / Antenna SWR.
Meter #2 : Received Signal Strength /
MOD%
AC Input Voltage AC 120V , 60 Hz
TRANSMITTER
RF Power Output 25W : USB, LSB. 10W : AM, FM, CW
Antenna Connectors UHF Type, 50 Ohms
AM Modulation Up to 100%
Clarifier Range ±5KHz XMT & REC; ±1.5KHz REC only
Spurious Emissions -60dB
Carrier Suppression -60dB
RECEIVER
Sensitivity for 10dB S/N AM : 0.5uV
Sensitivity for 20dB S/N FM : 0.25uV
Sensitivity for 10dB S/N USB/LSB : 0.3uV
Adjacent Channel Rejection -60dB
Image Rejection Ratio -50dB
AGC Figure of Merit SSB/AM : 80 dB for 50mV
for 10 dB Change in Audio Output
Audio Output Power @ 10%
THD 2.5W
(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.)

- 3 -
INSTALLATION:
Location/Connection
The transceiver should be placed in a convenient operating location
close to an AC power outlet and the antenna lead in cable(s).
The transceiver is powered with the AC power cord set. Proceed as
follows to complete all necessary connections to the transceiver.
1. Your transceiver has a standard SO-239 connector on the rear
panel for easy connection to standard PL-259 coax plug. If the
coax antenna cable must be made longer, use coax cable with
impedance of 50 ohms and use only enough cable to suit your
needs. This will insure a proper impedance match and maximum
power transfer from the transmitter to the antenna.
2. AC Power Operation: Use 120 volts AC.
Noise Interference
There are several kinds of noise interference you may encounter in
base station operation. Some of these noise sources are; fluorescent
buzz, nearby commercial broadcast, electrical appliance,
lawnmower, and electrical storms, etc. Commercial products are
available to reduce interference from these sources. Consult your
dealer or professional amateur radio supply shops.
- 4 -
Antennas
Antennas are purchased separately and include installation
instructions. Numerous type of antennas are available that range from
emphasis on easy of installation to emphasis on performance. Often
the difference in performance between many of the antenna is
modest.
1.Vertical Ground Plane Antennas:
These are omni-directional antennas that provide optimum
performance for contacting other fixed stations using vertical type
antenna in addition to all mobile stations. For medium long range
communications work.
2. Directional Beam Antennas:
Highly efficient and directional antennas generally intended for
fixed-to-fixed very long range communications.
Remote Speaker
The external speaker jack (EXT. SP.) on the rear panel is used for
remote receiver monitoring. The external speaker should have 8
ohms impedance and be able to handle at least 3 watts. When the
external speaker is plugged in, the internal speaker is disconnected.
Note: The PHONE jack on the front panel overrides both external
and internal speakers. When the plug from a headphone is plugged
to the PHONE jack, both internal and external speakers are silenced
simultaneously.

- 5 -
Public address
An external 8 ohms, 3 Watt speaker must be connected to the PA jack
located on the rear panel when the transceiver is used as a public
address system. The speaker should be directed away from the
microphone to prevent acoustic feedback. Physical separation or
isolation of the microphone and speaker is important when operating
the PA at high output levels.
- 6 -
OPERATION:
INTRODUCTION
This section explains the basic operating procedures for the DX
2517 amateur base station transceiver.
CONTROL & CONNECTIONS:
1. POWER ON/OFF CONTROL: Push ON to apply power to
the unit.
2. RF/SWR METER: This meter operates during transmit only. It
reads power output or SWR.
3. SWR/CAL SWITCH: This switch is used with the
“CALIBRATE” pot (No.12) to measure your SWR. Simply put
this switch in the “CAL” position. Then, transmit in AM, FM or
CW while adjusting the “CALBRATE” pot until the needle on the
left meter goes to the small red “Notch” on the SWR scale (You
may need to be at maximum power to reach the “SET” mark).
Now, while still transmitting, put this switch up to the “SWR”
CHANNEL
RX / TX
POWER
MICROPHONE
OFF
ON
SWR
MIC RF
+10KHz
NORMAL
CALIBRATE
CAL
OFF
T.B. DIM
OFF
OFF
WATTS
NB / ANLSWR
2
4
6
2
1
3
0
R.BEEP
8
10
12
SET
22
OFF
TIME ECHO
OFF
NF
+20
dB
SIGNAL
OVER
90
N
O
80
20
30
5
9
60
70
40
7
50
I
T
L
U
A
O
M
D
1
0
10
3
100
+60
+40
9
RF POWER
SQUELCHBAND
A
C
B
F
D
E
USB
MODE
USB
FM
AM
PA
PA AMFM
LSB
CW
CWLSB
VOLUME FINE COARSE
2517
PHONE
11 18
13
12
15
14 1716
22
20
19
21 23 24 25
27 4
13
2 5 6 7 8 9 10 26

- 7 -
position. This will give you an SWR reading. When you are
finished, be sure to turn the “CALIBRATE” pot fully CCW to the
“RF” position so you are able to read your output power. You will
hear the “RF” switch click on.
4. NB/ANL SWITCH: This switch controls the Noise Blanker and
Automatic Noise Limiter simultaneously. They are turned on and
off together. The noise Blanker is very effective for eliminating
repetitive impulse noise such as ignition interference. The
Automatic Noise Limiter reduces strong atmospheric or man-
made interference.
5. ROGER BEEP SWITCH: When this switch is placed in the
ROGER BEEP position, the radio automatically transmits an
audio tone at the end of your transmission so that people who are
having trouble hearing you will know that you are done speaking.
As a courtesy to others, use the Roger Beep only when necessary.
6. NOISE FILTER: This filter de-emphasizes audio high frequency
response in order to increase the signal-to-noise ratio of weak
signals. While you will notice a dramatic reduction in the
“rushing” sound when this filter is activated., it does not have
much effect on the signal-to-noise ratio of strong signals.
7. +10KHz SWITCH: This switch adds 10KHz to the frequency
being used. Example, if frequency counter display 28.765, flip the
switch and the display will read 28.775MHz.
8. SIGNAL/MODULATION METER: This meter indicates signal
strength of incoming signals during receive and your percentage
of modulation when transmitting in the AM. Modulation readings
are most accurate when using maximum output power. The
modulation meter does not work at all in FM or SSB.
- 8 -
9. CHHANEL DISPLAY: The channel display indicates the
current selected channel.
10. FREQUENCY COUNTER: The frequency counter indicates
the frequency of operation.
11. MICROPHONE JACK: Used to connect microphone for voice
source.
12. CALIBRATE CONTROL: In the “RF” position, the left meter
reads power output in watts. When rotated clockwise, it is used in
conjunction with the “SEW/CAL” switch (No.3).
13. DIM CONTROL: Controls the brightness of the meter lamps
and display digits.
14. TALK BACK: This is a switched pot that controls the volume
of the talkback sound. It does not affect the sound your
transmitting. You can turn the talkback off (Fully CCW) or adjust
the volume as you desire. This talkback circuit can be used
anytime – even without any sound effects.
15. RF GAIN CONTROL: This control is used to reduce the gain
of the RF amplifier under strong signal conditions.
16. MIC GAIN CONTROL: This control adjusts the microphone
gain in the transmit mode. This feature is designed for use in a
high-ambient noise environment or to maximize talk power.
17. TIME/ECHO CONTROL: This “TIME” control pot turns the
ECHO on and off and is used to set the time delay of the ECHO
repetitions. The ECHO control sets the intensity of the ECHO
effect.

- 9 -
18. CHANNEL SELECTOR: This control is used to select a
desired frequency.
19. MODE CONTROL: This control allows you to select one of
six operating modes: PA/FM/AM/USB/ LSB/CW
20. BAND SELECT SWITCH: This switch is allow the user to
select the desired band.
21. SQUELCH CONTROL: This control is used to control or
eliminate receiver background noise in the absence of incoming
signal. For maximum receiver sensitivity, it is desired that the
control be adjusted only to the point where the receiver
background noise is eliminated. Turn fully counterclockwise, then
slowly clockwise until the receiver noise disappears. Any signal
to be received must now be slightly stronger than the average
received noise. Further clockwise rotation will increase the
threshold level which a signal must overcome in order to be
heard. Only strong signal will be heard at a maximum clockwise
setting.
22. RF POWER: This control is used to adjust the RF power output
level you want in AM or FM transmission.
23 VOLUME CONTROL: Permits you to adjust the listening level
when receiving.
24. COARSE/FINE CONTROL: The “COARSE” control adjusts
the frequency ±5.0KHz in receive and transmit. The “FINE”
control adjusts the frequency ±1.5KHz in receive only. This
comes in handy when tuning in someone who is “OFF” frequency
compared to everyone else.
25. PHONE JACK: Accepts a plug from a headset of 4 to 32 Ohm
impedance.
- 10 -
87
1234 5 6
26. MODE LED INDICATORS: The lighted LED indicates which
mode the radio is in.
27. RX/TX LED: Lights green during receive and changes to red
during transmit.
REAR PANEL CONNECTOR:
1. AC POWER CORD : Connects to AC power outlet for AC
mains supply.
2. FUSE : Accommodates a fuse for AC input circuit protection.
Use 125V/7A fuse for replacement.
3. EXTERNAL SPEAKER: This jack accepts 4 to 8 ohms, 5 watt
external speaker. When the external speaker is connect to this
jack, the built-in speaker will be disabled.
4. PA SP: Used to connect a PA speaker (8 Ohm 4w) for PA
operation. Before operating PA you must first connect a PA
speaker to this jack.
5. ANTENNA: This jack accepts 50 ohm coaxial cable with a type
PL-259 plug to be connected.

- 11 -
6. REC JACK: The RCA-type (pin) jack provides audio output for
connection to a tape recorder. This can be used to record
incoming signals or your voice when transmitting.
8. FREQUENCY COUNTER JACK: The RCA-type jack
provides a signal used by some frequency counters so you can
read the frequency digitally. This readout signal operates on
transmit only.
4. CW KEY: Use for Morse Code operation. Connect a CW key to
this jack and place the MODE switch in the CW position.
MICROPHONE:
The receiver and transmitter are controlled by the push-to-talk
switch on the microphone. Press the switch and the transmitter is
activated, release switch to receive. To transmit, hold the
microphone about two inches from your mouth and speak clearly
in a normal voice. The radio comes complete with a low impedance
dynamic microphone.
OPERATION PROCEDURE
A. PROCEDURE TO RECEIVE
1. Make sure that the power cord, microphone and antenna are
connected properly.
2. Turn the volume down to about the nine o’clock position.
3. Set the mode switch.
4. Push the power switch on. The meter and display LED’s
should light up unless the dimmer control is set too low.
5. Select the desired frequency.
6. Adjust the receive gain for maximum.
7. Set the squelch as desired.
8. Use the “COARSE/FINE” control as necessary to tune
signals in properly.
- 12 -
B. PROCEDURE TO TRANSMIT
1. Set the MIC gain fully clockwise.
2. Press the push-to-talk switch on the microphone and speak
directly into the microphone.
3. Adjust the MIC gain down if the person you are talking to
says your are too loud.
C. MICROPHONE GAIN CONTROL
A preamplifier circuit is built into the radio to increase the
microphone gain. Experiment with the control for setting that
will best suit your individual use.
Note: When the microphone gain control is set to maximum,
ambient noise may also be picked up by the microphone. In high
noise situations, low microphone gain setting may produce the
best results. The microphone gain control is also used to adjust
PA loudness.
D. PUBLIC ADDRESS OPERATION
To use this feature of the transceiver, a speaker having a voice
coil impedance of 8 to 16 Ohms and power handing capability
of least 3 watts should be connected to the PA SP jack on the
rear panel. Be sure that there is physical separation between the
microphone and the PA speaker itself. If the PA speaker is
located very close the microphone, acoustic feedback will result
when the PA amplifier is operated at high volume (or when PA
is used indoor). Adjustment of PA volume is made with MIC
GAIN control.
E. S.W.R MEASUREMENT
Most antenna are factory tuned, but the antenna efficiency may
be peaked by slightly adjusting the length of antenna using the
SWR meter built into the unit. This adjustment may improve the
antenna standing wave ratio (SWR). The SWR permits you to
determine how well matched the antenna and its cables are to your
transceiver.

- 13 -
1. Set the unit in the receive mode as instructed under the
operating procedure to receive section.
2. Set the mode switch to AM position, the SWR-CAL switch to
the CAL position.
3. Press the push-to-talk switch on the microphone and turn the
calibrate control clockwise (past click) so that the SWR meter
pointer exactly coincides with the set mark on the scale.
Release the push-to-talk switch.
4. Set the SWR-CAL switch to the SWR position and depress
the push-to-talk switch again. The SWR of your antenna is
read directly on the scale.
- 14 -
WARRANTY
This radio has a one year parts and
labor warranty. For warranty service,
please contact your dealer.
BE SURE TO VISIT OUR WEB SITE AT:
www.galaxyradios.com

- 15 -
PRINTED IN TAIWAN
AT0SSB010W