by pushinoldrc » Mon Dec 13, 2010 2:22 am
JR radios are fairly simple to hack to the 2.4 DIY module. When you open the back of the transmitter, you will see a board that is the very top of the sandwich of boards. This is the FM modulation board. It takes the PPM signal from the processor (3 wire connector at the top of the board) and transposes it upon the carrier wave (35.xxx frequency). You can cut the 3 wires just short of the connector. Leave enough wire out of the connector in case you want to modify it back to the FM band. Remove this board, the antenna and the spacer board under the antenna.
Splice these 3 wires into the DIY connection wires where the black connects to the black (battery NEG), the red to the red (switch POS), and the white wire to the yellow wire (PPM signal from the processor). Determine where you want the LED and switch board from the DIY module to reside and mount it making the two holes through the case.
You may use the supplied screws to secure this board, or find another way to mount it. I mounted the module with double sided foam tape to the next board directly on top of the processor chip.
I just finished modifying a JR SX600, and took Bruce's idea to mount the LED board where I can see it from the front, eliminating the possibility of flying while in range test mode.
I mounted my antenna as described earlier in this section by affixing it to a washer and gluing it inside the unit.
I think this setup looks very professional, and I like the aesthetics of it.
Bryan
Landing is one aerobatic maneuver that MUST be perfected!