Adding a Corona 2.4gHs system to a old 72mHz JR TX

So you love your old JR 72mHz radio but everything seems to be 2.4gHz these days. Don't fret! here's an answer that may work. *(please note not all transmitters are the same)

Get yourself a DSSS DIY 2.4gHz module/TX kit like this one from HobbyKing

http://www.hobbyking.com/hobbyking/store/__9770__Corona_2_4Ghz_DIY_Module_RX_DSSS_.html

First thing you want to do is find a good place to mount the 2.4gHz unit in your radio

Next you will need a 9 pin 2-way switch so you can completely isolate the 72mHz TX from the 2.4gHz tx. Cut the Signal, Ground and Power wires going from the contoller to the 72mHz TX unit and route them from the contoller to the center position on the switch. After solding the connections i used hot glue as an insulator, messy but quick.

Next find a good place to mount the binding boad and switch. be careful not to tighten it too tight or the binding button may bind ;)  or stick.

Next make sure the Antenna is mounted and connected to the 2.4gHz module. make sure the shielding is also soldered to the ground on the board.

Next connect the Signal, Power and Ground coming from the control board to the center position on the switch. then make the appropriate connections. (Your radio may be different)

Finally i would strongly suggest upgrading your batteries from Nicad to LiFe

Now with the switch set to 2.4gHz, when binding the  powered RX to the TX make sure you hold the binding button down AS you trun on the radio. Only hold the but for about 2 seconds holding longer will result in loss of binding.  (See Corona binding instructions for this procedure) http://www.hobbyking.com/hobbyking/store/uploads/718339931X238267X54.pdf

Also, make sure, after binding that IF you have a both 72mhz RX and a 2.4gHz RX powered on at the same time that your radio is greater than three feet away or signal interferance will be seen on both RXs

Here's a sample video of switching between the two frequincies.