Transmitter upgrade 2,4GHz
I upgrade my transmitter Graupner MX-12 40 MHz with a Corona DIY 2,4 GHz module. Now I have the advantage from the new technologie 2,4 GHz which elimante radio interference and glitches. The software designed exclusively for the transmitting module and receiver instantly locates and assigns safe and protected channels. Other flyers in the area can not create interference that normally would corrupt transmitter signals. The Corona 2.4GHz adheres strictly to Frequency-Hopping Spread Spectrum (DSSS) communication standards by constantly switching across a wide band of frequencies.
The short antenna is also very handy specially with helicopters.







First unplug the battery and unscrew the backside off the transmitter. Remove the old 40 MHz module.


Solder the wires to the 40 MHz module onto the CR8Z 2,4 GHz module. Be careful to connect the wires the right way. The white top wire is the massa (ground). The middle white wire is the PPM signal. And the bottum red wire is the + wire. Strip a little piece of the wire and slide a little heat shrink over it. Re solder the wires back together and cover it with the heat shrink. It is wise to cut the wires one by one.






Before you can fit the module into the transmitter you first have to solder the antenne. This is a delicate job because the outside mantel of the antenna is very fragile. The little printing plate with the led and bind switch must also find a place in the transmitter. The bind button must be pushed from the outside of the transmitter. In my case I fit it in front of the antenna, because it looks good there.


The antenna is inplace of the old antenne. But I didn't find a good solution to secure it. So for now I just bend a pianno wire. It will do the jub but it isn't very chic though.



Advantage:
- 2,4 GHz technologie;
- short antenne;
- Transmitter consumes less power.

Disadvantage:
- don't bind first time (usually second time);
- sometimes loses the connection within one meter. Never a problem when flying but can be a fuss for making adjustments on a workbench.

Conclusion:
- very good and cheap upgrade for your "old" transmitter (there is nothing wrong using MHz though);
- binding problem is getting used to;
- never had a lost connection further away than one meter.