In this tutorial, I’ll show you how to replace the stock transmitter of your Turnigy 9x with a more advanced module by FrSky.
The FrSky module has many advantages:
- it can cover more distance
- it’s more robust in the presence of noise
- it can receive telemetry data
- it supports different rx modules
On the Internet is available a receiver feature chart about the different receiver modules that also lists the compatibility between the rx and the tx modules.
I brought from Banggood the transmitter module and some receivers:
- FrSky DJT-JR 2.4GHz Transmitter Telemetry Module, tx module
- FrSky D4R-II 2.4G 4CH ACCST Telemetry Receiver, the most “advanced” receiver (telemetry, CPPM…)
- FrSky V8R7-II 2.4G 7CH Receiver, a good 8-channel receiver
- FrSky VD5M 2.4G 5CH Micro Receiver, the smallest receiver, 5 channels
Let’s start removing the original tx module from the back of the radio. With a Phillips screwdriver, open the module and desolder the antenna wire:
You can now pull out the plastic antenna after having unscrewed it and finally remove all the different components:
Before being able to install the new FrSky module, on some models of the Turnigy 9x radio – including my own – a small modification of the plastic case is needed. Open the radio and unscrew the PCB in the back, to be able to pull out the 5 pins that connect the radio to the receiver:
Now remove the plastic emboss around those pins:
After having closed again the radio, you can now install the FrSky module and screw its antenna:
No changes to the configuration of the radio are required, you can simply turn it on and bind the new receivers!