CQ Amateur Radio №9 2018.pdf

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New Column! Microcontrollers p. 65
C
C
OMMUNICATIONS
& T
ECHNOLOGY
SEPTEMBER 2018
New
APRS
/ D-STAR
®
®
TH-D74A 144/220/430 MHz Tribander
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.
M
M
M
M
M
M
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M
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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)
Free software for Memory and Frequency Control Program
Data Import / Export (Digital Repeater List, Call sign, Memory Channel)
Four TX Power selections (5/2/0.5/0.05 W)
Dust and Water resistant IP54/55 standards
APRS (The Automatic Packet Reporting System) is a registered American trademark of WB4APR (Mr. Bob Bruninga).
D-Star is a digital radio protocol developed by JARL (Japan Amateur Radio League).
Customer Support/Distribution
Customer Support:
(310) 639-4200 Fax: (310) 537-8235
ADS#29116
SALES & SPECS:
w w w . s t e p p i r. c o m
425-453-1910
Portable & Emergency
Communications
Specialists
CrankIR
R
Vertical
al
ON THE ROAD, WITH POWER AND PERFORMANCE
Non-Powered
Portability
Also Available!
ble!
Check Out Our
S T E P P I R V E R T I C A L A N D D I P O L E A N T E N N A S TA K E Y O U
20-6m Dipole
The 20m-6m dipole is arguably our most portable
antenna. The dipole is simple to install, weighs
a total of 15 lb and consists of two telescoping
poles and an EHU. Length when operating is
36 ft. The dipole is portable and easy to install,
but make no mistake, this antenna is a full-sized
te
performer. There is no substitute
for being able to tune the
antenna to the exact length
needed on all frequencies
within it’s range.
DIPOLE
Small lR
Big IR
The BigIR and SmallIR verticals
are the only true ¼ wave
continuous coverage antennas
available for the HF bands.
Being able to adjust the length
of the element allows the
Steppir vertical to be mounted
nearly anywhere and still
provide a good match to your
transceiver. The BigIR stands
32 ft high and covers 40m-6m
continuously; The SmallIR
stands 18 ft high and covers
20m-6m continuously.
Optional coils are available
VERTICAL
for frequency coverage up to
80m. Radials are necessary
with all ¼ wave verticals.
ANNOUNCEMENTS
EDITORIAL STAFF
CONTRIBUTING EDITORS
Ø
Ø
Ø
AWARD MANAGEMENT
CONTEST MANAGEMENT
Ø
BUSINESS STAFF
CIRCULATION STAFF
PRODUCTION STAFF
HAM RADIO NEWS
“Parity Act” Language Removed from Defense Bill
Baofeng Importer Cited by FCC for Illegal
Marketing
Bye-Bye, OO … Hello, VM

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