Syma X5C range Hack

Yesterday, finally, I had enough time to hack my Syma X5C transmitter.

Why I had to make this hack risking to brick my transmitter? because I need more the 30m for a decent outdoor flight.

Last week I was curios what’s inside the Syma X5C transmitter and how can I extend the control, as well the flight distance. Of course, like a bad kid, I immediately opened it :)

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After few minutes I found why the range is that short. The tiny antenna on the top of the RC is only a fake plastic with nothing inside . The antenna is only a 3cm long wire soldered on the TX module.

I decided to add a true 3db or 5db 2.4Ghz antenna to the transmitter. As most of the WIFI routers are operating at the same frequency (2.4Ghz), I decided to order from Ebay an antenna and a WIFI pigtail to hack my Syma X5C transmitter. Unfortunately, the shipping from China to my country takes more then 3 weeks…I don’t want to wait that much…lucky for me I found a dead WIFI router that was perfect to recover the antenna from it.

Now I have everything to start the Syma X5C range hack. All the steps of this hack are also documented by images at the end of this post.

  • Step 1 –  open the dead router;
  • Step 2 – remove the 2.4Ghz antenna from the dead WIFI router;
  • Step 3 – open the Syma X5C transmitter;
  • Step 4 – unsolder the power wires of the Syma X5C transmitter (red +, black -)
  • Step 5 – remove the original “antenna”, that tiny 2cm wire from the TX module;
  • Step 6 – checking and testing the GND and the signal pins on the TX module;
  • Step 7 – soldering the WIFI pigtail to the TX module;
  • Step 7 – soldering back the power wires;
  • Step 8 – reassemble the transmitter;
  • Step 9 – mount the 3db WIFI antenna to the Syma X5C transmitter;
  • Step 10 – Go out with my Syma X5C and test the extended range of the transmitter, hopefully up to 80-100 meters.

To determinate the exact range extension of the X5C transmitter after adding the 3db 2.4Ghz antenna, I need to borrow a radio frequency spectrum analyzer.

Syma X5C range Hack video

I think the images will talk by themselves and, if you want to extend your Syma X5C transmitter range, you will easily reproduce this hack.

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