Use the steps below to add a charging
jack to your Futaba T2ER transmitter.
You will need a Coaxial DC power jack and a + and -
wires about 6" long to connect the jack to the circuit board.
I use a Coaxial DC power jack from Radio Shack part
# 274-1583 priced at $1.99
For the wire I use servo wire or stranded speaker
Below is how it is installed.
PLEASE NOTE: This will
VOID your radio warranty so be sure your
radio is in good working order and you follow
the directions completely.
Futaba offers a charging jack that fits the radio
but the cost is
about 4 times what it is to use
one from Radio Shack.
First unscrew the antenna and remove
Then remove the 4 screws on the back of the
When the screws are removed. Hold the radio together
lay the radio down on a flat surface. Split the
cover lifting the top
off of the back. The silver switch button will be
the only thing holding the
top cover in place. Pull the cover as you hold the
bottom of the radio and
it will lift off. The parts inside the radio are
drop mounted. (meaning nothing is
screwed down in place)
Once you have the antenna, switch button and the top
cover off the radio
set them to the side as there are no modifications
done to any of these parts.
You will need to drill a hole in the bottom cover
just above the area provided
for a charging jack. Drill the hole for the jack so
it is mounted in the bottom cover only.
Doing so will make the installation of the charging
jack easy and the top cover
will not come into contact with the jack at all..
Once the jack is mounted. You can connect the jack
to the board as shown in the images.
To do this strip and tin 1/8" of both ends of the +
and - wires you will be using.
Next locate the 2 holes just above the on/off
switch. The + (red wire) needs to be soldered
in the hole closes to the on/off switch as shown in
the images. Be sure you use the
proper soldering iron for the job.
Getting the board to hot can damage it and as noted
above. You now have no warranty to fall back on.
Next locate the 2 holes in the board going across
between the servo reversing switches.
The - (black wire) needs to be soldered in the hole
on the right as shown in the images.
Next connect the other end of the wires to the
Coaxial DC power jack.
Solder the + (red wire) to the center pin on the
Then solder the - (black wire) to the side pin on
the charging jack.
Then place the top cover over the gimbals and into
NEVER FORCE THE CASE IN PLACE!
Having to do so means something is out of
Remove the cover and make sure everything is in its
When everything is in place the front cover will
drop in place.
Next replace the 4 screws and the
Now remove the battery cover and note the + ends of
each battery location.
You need to spring the wire a little by sliding a
small knife under the wire and
lifting it up slightly. Doing so will insure proper
contact between the battery and connector.
You may notice that the wire at the + locations lays
flat and if you look at a rechargeable battery you
will see the + end of the battery does not stick out
as far as the + end does on a alkaline battery.
This is why the contact at the + ends needs to
be lifted up slightly.
Next install your rechargeable batteries and use a
volt meter to check to be sure the polarity
is correct at the charging jack. If you have done
All that is left is to install the switch button and
charge the batteries.
You should note that the batteries will only charge
if the radio is in the off position.
NEVER USE A CHARGING JACK IF YOU ARE NOT GOING TO
RECHARGEABLE BATTERIES AND THE PROPER CHARGER!