APRS/D-STAR 144/220/430 MHz Tribander Radio
Introducing the TH-D74A for the ultimate in APRS® and D-STAR® performance. KENWOOD has already garnered an enviable reputation with the TH-D72A handheld APRS® amateur radio transceiver. And now it has raised the bar even further with the new TH-D74A, adding support for D-STAR®, the digital voice & data protocol developed by the JARL, and enabling simultaneous APRS and D-STAR operation –an industry first.
Offering intuitive operation and rugged IP54/55 weatherproofing, this top-of-the-line portable transceiver features built-in GPS, wide-band multi-mode reception, IF filters, DSP equalizer, a transflective TFT color display, microSD memory slot and Bluetooth/USB connectivity.
• Full APRS compliance using packet communication to exchange real-time GPS position information and messages
• Compliant with digital/voice mode D-STAR digital amateur radio networks
• Built-in high performance GPS unit with Auto Clock Setting
• Wide-band and multi-mode reception
• 1.74” (240 x 180 pixel) Transflective color TFT display
• IF Filtering for improved SSB/CW/AM reception
• High performance DSP-based audio processing & voice recording
• Compliant with Bluetooth, microSD & Micro-USB standards
• External Decode function (PC Decode 12kHz IF Output, BW:15 kHz)
• Command / Control Protocol (ARFC, PC, Smartphone)
• Data Import / Export, (Digital Repeater List, Call sign, Memory Channel)
• Four TX Power selections (5/2/0.5/0.05 W)
• Weatherproof IP54/55 standards
Compatible with the APRS communication protocol, which allows real-time two-way
data transmission by using packet communications, This stand-alone device provides
enjoyment of communications that make use of a variety of features, including sharing of
local and GPS positional information, and message exchange.
Other station positional information,
weather station information
The new feature "relative display compass" enables real-time
GPS information for your station ‘at a glance’, information for
your own station set in advance, or the distance/direction heading/speed of other stations. It is now easier to confirm
the relationship with your own station's position and heading.
Weather station information can be displayed in color, such as
rainfall, temperature, wind speed/direction, barometric pressure
and humidity data.
Station list and object compatibility
A maximum of 100 stations can be stored, including mobile stations, base stations, weather stations and objects. It is also
possible to limit or sort the kinds of stations received. Local
information can also be transmitted as an "object."
Real-time messaging is
possible between stations
running APRS. Messages
can be sent by inputting text
via the keys on the panel
or selecting a message
FM or D-STAR voice channels can be set according to
frequencies or D-STAR repeaters information embedded
in beacons from APRS stations enabling fast QSY. D-STAR
gateway communication is also set automatically.
KISS mode TNC
The built-in KISS mode TNC for APRS enables APRS operation
via PC after connection via USB or Bluetooth.
APRS menu settings
The unit is also compatible with a variety of features that
expand its scope of operation, including SmartBeaconing,
Decay Algorithm, Proportional Pathing and APRS voice.
Compatible with D-STAR, the amateur radio communications network that has both
voice and data modes. Both local and international communications are possible
through diverse operations including simplex communications, single repeater relay
communications, and inter-repeater gateway communications.
Compatible with D-STAR,
as developed by JARL
The unit is compatible with the D-STAR amateur radio digital
communication system developed by the Japan Amateur
Radio League (JARL). Enjoy a variety of communication
methods with the clear voice only digital can deliver.
DV fast data mode
The unit features a DV fast data mode that accelerates
communication throughput by sending data on unused
voice frames to achieve more comfortable data transmission.
in DR (D-STAR Repeater) mode
The calling of other stations is made simpler by setting access
repeaters and other stations after selecting them from a list.
The unit includes a direct reply function that enables a reply
after pressing PTT for calling in gateway communications, as
well as a function that enables icon-display confirmation of
accessibility during kerchunk or gateway communications.
A maximum of 120 communication history items can be stored, with other stations able to be easily reset from the
Setting via the digital function menu
The appeal of D-STAR is
being able to enjoy a variety
of operating styles. The unit
employs a separate menu
that enables one-touch
Easily updated repeater list
The latest repeater lists can
be downloaded from the
internet. Updates to the
latest information can also
be performed via a PC, using
a USB cable, via Bluetooth or
a micro SD card.
Inherit the reputable KENWOOD sound
Enjoy clear-voice and easily heard communications through
KENWOOD custom tuned sound quality based on knowhow
accumulated over many years and the latest in audio
Wideband and multimode reception
Wideband reception is possible on Band B. In addition to
DV/DV Fast Data/FM/NFM/WFM/AM on the 0.1~524MHz
bands, SSB/CW reception is also possible. The unit comes
with a fine mode that achieves zeroing-in with a minimum
step frequency of 20Hz*1, and is equipped with a bar
antenna*2 for 0.1~10MHz reception. It also has VxV, UxU,
and VxU simultaneous receive functionality.
Built-in IF receiving filter is
for comfortable reception
The IF reduces neighboring interference signals during SSB or
CW reception, and enables low-interference reception with
its excellent skirting capacity. (Selectable range: SSB: 2.2~3.0
kHz, CW: 0.3~2.0 kHz, AM: 3.0~7.5 kHz)
IF output mode
Capable of output to a USB port of an IF signal with a central
frequency of 12kHz and a bandwidth of 15kHz, enabling
smart reception of all kinds of data via a PC.
High-performance DSP voice processing
The unit comes equipped with an audio equalizer that enables
the setting of each of a 5-band reception EQ (0.4~6.4kHz)
and 4-band transmission EQ (0.4~3.2kHz), making it possible
to adjust sound quality to your preference.
Visibility and user-friendliness
taken into account
The unit uses TFT transflective color liquid crystals, and using
reflected light and a backlight, achieves superior visibility
in both dark places and bright places such as in sunlight.
In addition to the cross-shaped key structure, the keypad
incorporates highly-operable flat and slim key-tops for a
For easy visual comprehension of pop-up
screens, APRS uses blue as a background
color, while D-STAR uses green.
Tough weatherproofing meeting
IP54/ 55 standards
Kenwood increased dust and water resistant in anticipation of tough
conditions, using heavy-duty specs so you never have to worry
about the dusty outdoors or sudden showers.
The unit is equipped with
a high-performance GPS
patch antenna. It also
features closest D-STAR
repeater search, along with
a GPS receiver function
that stores movement
paths, and an automatic
time correction function.
Standard compatibility on a rich interface
The unit features standard compatibility for Bluetooth.
Micro SD / SDHC memory
card and micro-USB
ports are also included,
enabling operation via an
interface flexibly linked
with a PC.
Greater convenience through free PC software
Available software includes the MCP-D74*3 program, which enables the management of settings including memory on a PC, and the ARFC-D74*3 program, which enables free changing of the unit’s frequency via PC.
*3: The MCP-D74 and ARFC-D74 programs are available post-sale for download from the Kenwood website.