Given the help provided by others, I thought I’ pay it forward with my spin on the installation of the FRSky DHT 8Ch DIY transmitter in my Turnigy 9x Transmitter.   Before getting into the details, I’d like to credit RCModelReviews for Bruce’s how-to video  as well as for details on how to update the firmware of the D4R-II (to solve the PPM framerate issue).   Although this is primarily about the DHT DIY module install, it goes hand-in-hand with the D4R-II receiver – so I’ve added a bit on it.  Also, there are other examples of how to add the DHT module out there (Google is your friend).  Instead of doing a video, I decided to take a series of stills and annotate them as I went along.  Hopefully this helps you get yours installed as well as gives you some alternate ideas to the approaches others have taken.

From a difficulty standpoint, I would classify this as a 4 out of 10.  It’s less involved with playing around with circuits and soldering than it is with simply finding the right place for components and modifying the antenna mounting and glueing things together.  It’s a pretty easy install.  Also, I’ve referenced the D4R-II receiver as it pairs well with the DHT 8CH transmitter.

The units being installed:


What’s not included:

  • Flashing the Dr4-II receiver with the 27ms framerate fix.  The link above can guide you through this.  Note – you only need to do this if you plan on using more than 6 channels.
  • Switching over to PPM (or CPPM) mode.  This is easily done in Cleanflight.


The following shows instructions on how to do this mod.  To see larger pics, click the first image. It will popup allowing you to view the full size images and scroll as you go through each step. Textual instructions are at the bottom of each image.