Hello,

a couple of month ago I broke my dx6i antenna while playing with my RC paraglider.

I thougt that this would not be a problem and go on playing with it... after some day the shield broke, I tried to fix it but I think I did worth. And one day I crashed a model (a really nice to fly DLG Apache) due to a really short range (less than 50m). I then thougt the problem came from my broken antenna and ordered a new one. some day after, I was flying my paraglider and loose range nearly 100m away from it.

So The problem was coming from the transceiver himself, surely the POWER AMPLIFIER (PA).

After spending some time at looking on how it works, I I decided to remove the transceiver and replace by an other one. The module is operating with 3.3V and works with a simple UART protocol.

602

I spent some time looking at Corona 2.4ghz system I bought some time ago , which looked nice except that it need 12V to operate. By curiosity I looked inside this small RC 2.4ghz I bought to equip one of my paraglider, to see what is the protocole used.

It appears that it is a very simple negative PPM protocol, in fact the same as my DX6I trainer signal... and the transmitter himself take 5V of the mainboard to downstep it to 3.3V, plus 1 wire for the PPM IN and 1 wire for a bind switch (seems to be Hiz).

So I unsolder everythings : the 4 wire (5V, GND, SW, and PPM) and the antenna (to remove it).

trans

An put everything in my DX6i

604

I took the different wire on the mainboard without unsoldering anything of the dx6i, juste remove the switch connector and trainer connector.

dx6i_mod

on the transmetter side, I had to solder few things, like 3.3v, PPM, Bind Switch and GND.

trans2

Then you just have to put the antenna, which fit like it has always been there, and solder it back, this is the most difficult part, because of the coaxial cable which is very thin.

One other solution is to solder a mini connector sold at Sparkfun that will enable you to put the original dx6i antenna:

conn

here it is, when you switch the mix it power up you radio, and the trainer switch is used to bind it with your Hobbyking receiver.

606