Wouxun KG-S74A User manual

ank you for purchasing the Wouxun KG-S74A portable aviation radio.
Your feedback makes our products better. Please share your thoughts.
[e-mail]
www.buytwowayradios.com

2
Contents
Safety Information������������������������������������������������������������������������������������7
FCC Licensing Information.........................................................................11
Getting Started��������������������������������������������������������������������������������������� 12
Feature Summary..........................................................................................12
What’s Included ...........................................................................................13
Front Panel Guide ........................................................................................14
Right / Left Side Guide ...............................................................................15
Display Guide...............................................................................................16
Dust and Water Protection...........................................................................17
Installing and Removing the Battery ............................................................18
Charging the Battery ....................................................................................18
Antenna Information....................................................................................20
Installing the Belt Clip .................................................................................21
Operation����������������������������������������������������������������������������������������������� 22

3
Introducing the KG-S74A............................................................................22
Your First Transmit.......................................................................................23
Channel and Frequency Modes ....................................................................24
Channels.......................................................................................................25
Channel Scan................................................................................................26
Priority Channel Scan ..................................................................................27
NOAA Weather Mode.................................................................................28
Keypad Hotkeys ..........................................................................................30
Key Lock ......................................................................................................32
Keypad Function Keys ................................................................................33
Programmable Key Functions .....................................................................33
Stopwatch Timer ..........................................................................................37
Menu Functions ������������������������������������������������������������������������������������� 38
[01: SQUELCH] Squelch............................................................................38

4
[02: MODE] Work Mode............................................................................38
[03: STEP] Frequency Step..........................................................................39
[04: CH-ADD] Add Memory Channel.......................................................39
[05: CH-DEL] Delete Memory Channel....................................................39
[06: CH-NAME] Channel Name................................................................40
[07: BACK-LT] Backlight Timout ..............................................................40
[08: VOX] Voice Activated Transmit............................................................41
[09: SCAN-ADD] Scan Add / Delete.........................................................41
[10: SCANMODE] Scan Mode ..................................................................41
[11: PRI-SCAN] Priority Scan ....................................................................42
[12: PRI-CH] Priority Channel ...................................................................43
[13: WX-ALERT] Weather Alert................................................................43
[14: WX-NOTIFY] Weather Alert Notication Setting ............................43
[15: BAT-SAVE] Battery Saver....................................................................44

5
[16: VOX-DLY ] VOX Delay .......................................................................44
[17: TOT] Transmit Overtime Timer ..........................................................45
[18: TOA] Transmit Overtime Alarm ..........................................................45
[19: BEEP] Button Beeps.............................................................................45
[20: VOICE] Voice Guide............................................................................46
[21: BUSYLOCK] Busy Channel Lockout..................................................46
[22: STARTUP] Power On Message ...........................................................46
[23: ST-MSG] Custom Power On Message ................................................47
[24: TIMER] Stopwatch Timer ...................................................................47
[25: AUTOLOCK] Auto Lock ...................................................................48
[26: LOCKMODE] Lock Mode.................................................................48
[27: PF1-SHRT] Side Key PF1 Short Press Assignment............................49
[28: PF1-LONG] Side Key PF1 Long Press Assignment ...........................49
[29: PF2-SHRT] Side Key PF2 Short Press Assignment............................49

6
[30: PF2-LONG] Side Key PF2 Long Press Assignment ...........................50
[31: TOP-SHRT] Top Key Short Press Assignment...................................50
[32: TOP-LONG] Top Key Long Press Assignment ..................................51
[33: VOLTAGE] Voltage .............................................................................51
[34: RESET] Factory Reset..........................................................................51
Advanced Operation ������������������������������������������������������������������������������� 53
Adding and Removing Channels..................................................................53
Troubleshooting ������������������������������������������������������������������������������������� 57
Technical Information ���������������������������������������������������������������������������� 59
Specications ................................................................................................59
NOAA Weather Channels ...........................................................................61
Optional Accessories������������������������������������������������������������������������������� 62
Limited Warranty ����������������������������������������������������������������������������������� 63

7
Safety InformationSafety InformationSafety InformationSafety Information
e KG-S74A is an electrical apparatus, as well as a generator of RF (Radio Frequency)
energy, and you should exercise all safety precautions as are appropriate for this type of
device.
Please read the suggestions and warnings below before using the transceiver.
⚠ Keep the transceiver and accessories out of the reach of children.
⚠ Do not disassemble the transceiver.
⚠ Only use the supplied battery pack and charger or genuine Wouxun branded
replacements purchased from an authorized dealer. Using improper batteries and
charging accessories can damage the transceiver.
⚠ e supplied antenna is tuned for the frequencies supported by this transceiver.
Using an aftermarket antenna can damage the transceiver.
⚠ Do not leave the transceiver exposed to direct sunlight or in overheated areas for an
extended period of time.
⚠ Keep the transceiver away from dusty or humid areas.

8
Safety Information
⚠ e transceiver should be cleaned with mild detergents and a soft brush or cloth.
Avoid cleaning with aggressive chemicals.
⚠ NEVER transmit without a properly connected antenna.
⚠ If an abnormal odor or smoke is detected from the transceiver, power it o immedi-
ately, then remove the battery pack. Contact your dealer for further assistance.
⚠ Only the carry accessories supplied with this radio (such as the belt clip) should be
used. Use of other accessories may exceed RF exposure guidelines.
Notice
▪ ese tips are important for safe operation of your KG-S74A
radio and its accessories. If the transceiver does not function
normally, please get in touch with your dealer immediately.
▪ If you use components or accessories not produced by the
Wouxun Company, Wouxun will not guarantee the safety and
usability of the transceiver.

9
Safety InformationSafety Information
Caution
Please read this manual before using the radio, as it includes important instructions for
the safe handling, use and operation of your radio.
FCC Compliance
is device complies with Part 15 of the FCC Rules. Operation is subject to the follow-
ing two conditions:
(1) is device may not cause harmful interference, and
(2) is device must accept any interference received, including interference that may
cause undesired operation.
WARNING: MODIFICATION OF THIS DEVICE TO RECEIVE CELLULAR
RADIOTELEPHONE SERVICE SIGNALS IS PROHIBITED UNDER FCC
RULES AND US FEDERAL LAW.

10
Safety Information
Note:
is equipment has been tested and found to comply with the limits for a Class B dig-
ital device, pursuant to part 15 of the FCC Rules. ese limits are designed to provide
reasonable protection against harmful interference in a residential installation. is
equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment o and on,
the user is encouraged to try to correct the interference by one or more of the following
measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit dierent from that to which the
receiver is connected.

11
Safety InformationSafety Information
- Consult the dealer or an experienced radio/TV technician for help.
Radio Operation and EME Exposure
Use only an antenna designed for use with this radio and its operating frequencies. Un-
authorized modications or attachments may damage the radio and violate FCC rules.
DO NOT hold the antenna while the radio is in use.
DO NOT attempt to use the radio with a damaged antenna.
FCC Licensing Information
e Wouxun KG-S74A is FCC Part 87 type accepted for use on the Aviation Radio
Service. e KG-S74A operates on Aviation Radio Service frequencies according to
the Federal Communications Commission (FCC) Rules in the United States. For more
information, visit the FCC’s web site at https://www.fcc.gov/.

12
Getting StartedGetting Started
Feature Summary
▪ Up to 400 Custom Channels
▪ Up to 6 Watts (PEP) Output Power
▪ 118.00-136.99 MHz
▪ NOAA Weather Channels
▪ NOAA Weather Alerts
▪ 5 Weather Alert Notications
▪ Tune Specic Frequencies Directly
(Frequency Mode)
▪ LCD Display
▪ Display Channel Name, Number, or
Frequency
▪ IP67 Waterproof
▪ USB-C Charging Port
▪ Channel Scan
▪ Priority Channel Scanning
▪ Superheterodyne Receiver
▪ Monitor Function
▪ VOX
▪ English Voice Guide
▪ Built-in Flashlight
▪ 2 Congurable Side Keys
Congurable Top Key
▪ Rechargeable Lithium-ion Battery
▪ PC Programmable

13
Getting StartedGetting Started
What’s Included
Carefully unpack the contents of the box and be sure that you have the items in the list
below. If any items are missing or damaged, please contact your dealer.
Transceiver High Gain Antenna Lithium-ion Battery Pack Intelligent Charger
Belt Clip Wrist Strap User’s Manual BNC Adapter
Headset Adapter

14
Getting Started
Front Panel Guide
Channel Knob
Volume Knob
RX/TX LED (Green/Red)
Microphone
Scan (Long Press)
Exit/Cancel
Antenna
Flashlight
Display
Speaker
Up/Down Keys
Menu/Enter
Keypad Lock
Keypad
Top Key
SQL MODE STEP SCAN
CH-ADD CH-DEL CH-NAM
BKLT VOX SC-ADD

15
Getting StartedGetting Started
Right / Left Side Guide
Earphone Jack
Transmit/PTT Key
PF2
Short Press: RECALL
Long Press: MODE
PF1
Short Press: SQUELCH
Long Press: WEATHER
Note: Defaults are shown for PF1 / PF2 / Top.
These buttons can be assigned different
functions in the menu.
USB Charging Port
Top Key
Short Press: EM-121.5
Long Press: FLASH-LT

16
Getting Started
Display Guide
Battery Save
VOX
Priority Scan
Current Channel
Keypad Lockout
Battery Voltage
Channel Number
Signal Strength Indicator
Weather Alert
Weather Mode

17
Getting StartedGetting Started
Dust and Water Protection
e KG-S74A is waterproof to IP67 standards. It is dust resistant and rated to with-
stand any ingress of solid objects and can withstand immersion in up to 1 meter of
water for up to 30 minutes. is radio is dust and waterproof only while the battery is
properly installed and locked in place with no gaps and all ports are completely sealed
with their hard port covers using the original supplied standard screws (not the soft
USB-C port cover or thumbscrew). Use of a headset or other accessory will negate the
dust and waterproong features of this radio. Do not attempt to operate this radio if it
has been submerged in water deeper than 1 meter.
▪ e radio charger is NOT dust or waterproof.
▪ Charge the radio only under dry conditions.
▪ DO NOT charge the radio when it is wet.
▪ DO NOT expose the radio and charger to wet environments when charging.
▪ If the screws and/or port covers are removed, the radio is no longer IP67 compliant.
▪ Use only the supplied standard screws to seal the port covers (not the thumbscrew).

18
Getting Started
Installing and Removing the Battery
e lithium-ion battery pack included with the radio is not fully charged out of the box.
It is recommended to charge it before using the radio for the rst time.
Installing the Battery
Slide the battery pack up along the back of the radio until it stops. en push the bot-
tom of the battery towards the radio until it clicks into place.
Removing the Battery
Pull the release latch toward the three battery contacts. While holding the release latch
in place, press down on the top end of the battery pack and slide the battery pack down
and o the radio.
Charging the Battery
e KG-S74A features two charging options for the battery pack. It can be charged
using the included desktop charger or the built-in USB-C port on the side of the radio.

19
Getting StartedGetting Started
Charging with the Desktop Charger
e KG-S74A includes an intelligent desktop charger. It can charge the battery pack
with or without the radio attached.
1. Insert the AC plug into an available 100~240v outlet. e LED light on the charger
base will ash red for 2-3 seconds. is indicates the charger is in standby mode.
2. Insert the battery or radio with the battery attached into the charger. e LED light
on the charger will turn red to indicate the battery is charging.
3. When the LED light on the charger turns green, charging is complete.
Note
▪ When a completely drained battery is rst inserted into the charger, the charger
will switch to trickle charge mode and the LED will ash red continuously.
▪ After 10-20 minutes the charger will switch to normal charging mode and the
light will turn solid red. e LED will turn green when charging is complete.

20
Getting Started
Charging with the USB-C Port
e KG-S74A can charge the battery from the USB-C charging port on the side of
the radio using an optional USB-C cable (not included). e battery pack can be fully
charged with a USB cable connected to a USB to AC adapter plugged into an AC
outlet or a to a USB port in a vehicle, power bank or computer.
When the radio is connected to a power source through the USB-C charging port with
a battery attached, the LED at the bottom of the port will light up red to indicate the
battery is charging. e LED will turn green when charging is complete.
In addition to the charging option, the radio can be powered directly via the USB-C
port while charging the battery pack.
A USB-C soft cover is included with the KG-S74A for easier access to the USB-C
port. is cover negates the IP67 waterproong when used in place of the hard cover.
Antenna Information
e KG-S74A includes an antenna with an SMA female connector that is tuned for