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The Kraft 2.4 transmitter module is housed in a Kraft Channel Master case.
Inside the Channel Master case is the JR 2.4 module, the interface electronics, LED and bind button, on the case is the 2.4 antenna. No modifications need to be made to the transmitter itself.
However; I do recommend that you swap channels 1 & 3 (elevator, throttle) on your transmitter. Throttle should be channel #1 which allows you to take advantage of JR's fail safe.
Note; many ESC's have a fail safe built into them - low throttle in the event of a problem. These ESC's will not recognize a hold as that is also a good set of servo pulses.
You may still plug in 72 or Ham modules into your transmitter. In these airplanes you will have to swap the elevator and throttle servos at the receiver.
When using the Kraft 2.4 Tx module in your 7C or Signature Series transmitter, you will note that the RF meter on the transmitter is indicating some value. The meter will operate but it does not indicate anything except there is power to the module. The RF meter may have different readings depending on battery voltage etc. As long as the RF needle moved, aprox mid scale or so - its ok.
The battery voltage meter on the transmitter has not been changed and will work as always. This meter should be between 9.6 and 11.4 volts for flight
Do not use LiPo batteries or batteries that are higher than 11.4 volts for the transmitter or 2.4 module.
Do not use the Kraft “Buddy Box” feature with the 2.4 module installed.
Do not use the 2.4 module without its 2.4 antenna.
Do not use this circuit with a 5C or 3C transmitter.
The telescoping metal antenna should be removed from the transmitter when using 2.4.
Your Kraft 2.4 Tx module was built around JR’s 2.4 9 ch Tx module. You may use JR/Spektrum receivers either DSM2 or DSMX. Note: some receivers have an 11ms frame rate. This may cause jitter with some analog servos, use digital servos with high speed receivers.
JR (JR only not Spektrum) now has a new mode, DMSS. The Kraft 2.4 Tx module will NOT operate those receivers.
*The telescoping metal antenna should be removed from the Kraft transmitter OR at least collapsed inside the case. An extended metal antenna close to the 2.4 antenna will kill your range.
*With the Kraft Tx off, plug in the 2.4 module.
*You need to adjust the 2.4 antenna so it does not point at the model when flying. You may rotate left /right but not more than 45 degrees as you might twist up the antenna wire inside. You may also bend the antenna away from the pilot but be careful in this position when laying the transmitter on its back,
*Power on - within a couple of seconds the module will light its LED (on back of Tx module).
*The bind button (on the back of the Tx module) has two functions, range test and bind.
#1 - If the bind button is pushed and held when the transmitter is “on”, the RF output is significantly reduced. Use this feature as a range test, you need to get at least 30 paces (90') from your model. When the button is released the output is restored.
#2 - Used to bind Tx to Rx.
Note; if you are flying more than one airplane with your Kraft transmitter, you may bind all your airplanes (receivers) at one time. This means you will not have to rebind when you fly another airplane - just check servo reversing. For this to work, all the receivers must be the same mode - either DSM2 or DSMX.
Bind - Tx to Rx
#1 - Plug bind jumper into bind port of Rx(s).
#2 - Power on Rx, LED(s) in Rx (and satellite receivers) will flash fast.
#3 - Set Tx sticks (and switches) to desired fail safe. Neutral and LOW throttle, trims too.
#4 - Push and hold the bind button on the back of the Tx module and then turn on Tx. Note, your Tx should NOT be right on top of the receiver. Move away a few feet.
#5 - In a few seconds, the flashing LED’s in the Rx (and satellite receivers) will be on solid and everything will operate. Release Tx bind button.
#6 - Turn Rx off then turn Tx off.
#7 - Unplug bind plug from RX.
Turn on Tx first.
Tx meters will come up and the LED on the back of the 2.4 module will come on within a few seconds.
Turn on Rx. second.
Receiver will link up in a few seconds with its LED(s) on solid.
*The Rx servo outputs are:
#1, Throttle #2, Aileron #3, Elevator #4, Rudder
#5, Landing gear (Sig radios swap ch 5 & 7) #6, Aux 1 #7, Aux 2
* All the servos will have a slightly different neutral position with the 2.4 module as compared to the stock (72 Mhz) Kraft system.
* If flying electric, the Kraft throttle servo reversing switch needs to be “reverse” for most ESC’s.
* The Rx antennas (or satellite receivers) should be as far apart as possible and on different planes, one vertical and one horizontal.
* JR/Spektrum receivers have a high drop out (brown out) voltage of about 3.2 - 3.3 volts. Several servos can cause voltage dips in the brown out range. You may want to consider 5 cell 6 volt Rx batteries or if you are flying electric use a BEC of 5.5 volts.
Any questions - please ask.