Photos by the author
The DX9 is the first Spektrum radio that uses a voice alert system. Choose one of five languages, select which notifications you want to hear, and
never have to look down at your transmitter while flying! On the back of the transmitter are the trainer port, audio jack, and sliders on each side.
Two rubber plugs conceal the throttle-spring adjustment, while gimbal stick-tension adjustments are made by removing the rear grips.
The inclusion of a graphical user interface in most of today’s radios has simplified programming,
while providing a host of features when
compared with the 1970s radios on
which I learned to fly. Their evolution
has made the hand-held link to our
aircraft more robust and intuitive, while
keeping prices competitive.
The switch to 2. 4 GHz stands out
as the biggest advancement in radios
during my time as an RC pilot. I became
an early adopter with the Spektrum
DX6, which eliminated frequency
conflicts and allowed for a neater radio
installation without long antennas on
the aircraft. A short time later, the DX7
and its Model Match feature ensured we
didn’t put our aircraft at risk by flying
with our radio set to the wrong model.
Further evolution of the Spektrum
line brought advancements such as
DSMX, which added frequency agility
over DSM2, and the addition of an
SD card slot, which allows for easy
software upgrades and to share and store
additional model settings.
Now the Spektrum DX9 continues
the trend by incorporating innovative
features such as voice notification and
alerts, a 250 onboard model memory,
and wireless trainer capability!
The DX9 is comfortable to hold and
has ergonomics similar to the DX8 and
DX18. Its antenna and carry handle are
slightly more streamlined and work as a
diversity antenna. The handle works as
a horizontal array in conjunction with
the main antenna, known as the vertical
array. This provides a more durable unit
and resolves the age-old question of how
to orient your antenna!
Rubber nonslip pads on the back of
the transmitter provide a nice grip for
thumbs fliers, and pinch fliers will find
them to be a nice place to rest their
The array of switches, knobs, and
sliders provide a multitude of options
and each one can be assigned to any
function you desire. The transmitter
has good stick tension, but if it is not to
71 Model Aviation MARCH 2014
email@example.com Horizon Hobby Spek Trum DX9