ENGINEREVIEW JR 12X 2.4GHz
The 12X can be ordered with the JR R1221 receiver. The R1221 is a full-range receiver
featuring DuaLink and MultiLink Technology. The 12-channel receiver combines one
internal and three remote receivers to offer superior path diversity. The remote
receivers are attached to 9-, 12- and 24-inch-length extensions allowing optimal placement in any aircraft. There are two types of fail-safes that can be incorporated into the
receiver: SmartSafe and preprogrammed fail-safe.
The R1221 has dual battery ports for power redundancy, something I always have in
my larger aircraft, and the receiver can handle up to 35 amps of continuous current.
In the unlikely event that all my servos drop the voltage below 3. 5 volts, I will be able
to establish control the instant voltage returns because of the new QuickConnect
instant voltage recovery system built into this receiver.
I like the fact that I can hook up the optional flight log and keep track of how each
receiver is receiving the signal. If there are any receivers dropping the signal too many
times, I can change their location inside the aircraft, assuring the best possible reception. This receiver is a great companion to an outstanding transmitter.
model to another 12X or your computer.
The PC data transfer program included with
the radio allows you to transfer programming data back and forth from the
transmitter and computer via the USB plug.
You can change the plane’s programming
on your PC using simple drop-down menus
or just use it as backup storage for transmitter model programming. The stick position
switch function allows the throttle, aileron,
elevator or rudder stick positions to be preprogrammed to turn on/off mixes, change
throttle curves, change differential rates,
start a timer and other functions.
This is one of the great features of
Spektrum DSM radios, putting an end to
the wrong model syndrome. A unique
code is embedded in the signal that will
prevent the receiver from responding if
the wrong model’s name is on the transmitter’s screen. Once you select the right
model, everything works like it should.
This feature will re-sequence data the transmitter transmits based on the type of
mixing you have selected. Servosync
ensures that the servos that are working
together will get their impulses together.
This allows their movement to be synchronized together for a much improved
screen. Now you can change the rates for
each switch position within the program
screen without having to actually move the
switch. Seeing what the rates are for each
switch position on one screen eliminates
the possibility of incorrect data entry.
The function mode screen is where you
find things like dual rates and exponentials,
throttle hold and curve, snap roll, differential mixing, aileron to rudder mixing,
elevator to flap mixing, rudder to
aileron/elevator mixing, servo speed, the
flap system, eight programmable mixers
and the aileron-to-flap mixing. You will
also find the servo monitor, timer and
trainer menus here.
One of the menus in the function mode
is the trim system menu, which allows you
to adjust the sensitivity of the trim levers
and turn on the LST trim. When LST is activated, only the center position is trimmed.
The center is shifted to the right or left but
the endpoints are not affected. Another
cool feature is the servo speed menu that
allows you to change how fast the servo
moves; this has all kinds of applications for
scale models. One of my favorite functions
is the mix monitor screen; this one screen
displays all the mixes, dual channels, wing
types and snap roll functions. This screen is
a very easy way to determine which functions are activated.
In the systems mode (get there by pressing the enter button and turn on the radio)
you’íll find the model selected, model
name, model reset, aircraft type select,
modulation, trim system, stick position
switch, flight mode name, settings, wing
type and transfer.
Some of the highlights in this mode are
the transfer menu that allows transferring
the programming data for a particular
THE FINAL VERDICT
The long-awaited JR 12X has arrived and I
can say that the wait was worth it. This is a
user-friendly system that’s ideally suited for
advanced to expert pilots. The case is
ergonomically designed to feel good in the
hands and allow a full day of flying with little fatigue. This flagship radio will most
likely be a hot commodity for some time
and can easily be the last radio you will ever
need. The 50-model memory along with
unlimited model program storage on a PC
allows the 12X the ability to store even the
largest number of plane programs. Add to
that the frequency freedom of DSM 2.4GHz
modulation and the ability to link to all of
the older Spektrum receivers, and you have
a system that everyone will be saving for. If
you don’t have one on order already, you
may be waiting some time before you can
get your hands on one.