ok i`ve got the point.i just use 2 antenas then.thanks to all for the info.
for the antena problem solved (that is to use 2 antenas) i`ve got another unexpected problem(for me though
).here`s the situation:
1.how come does the 27MHz transmitter (controller in this case) signal, caught by the 40MHZ receiver and by the 27MHz reciever as well at the same time.
2. this still happened even when i totally switch off the 40MHz controller.
3.but the signal from controller 40MHz only being recieve by the 40 MHz reciever (just like how it should be)
4. this situation still happen even when i seperate both of the controller (coz i happen to put both of the controller in the same box with 2 antenas in the 1st place) so i guess the reciever is messed up. is that any posibbility that the 40MHz signal interfere with the 27MHz reciever?(i expect it wont, since the frequency are a lot different)
5. just for the info (if needed) the reciecers share 1 power source (battery) and being place quite near (less than 1 feet).both the reciever have own antenas.
6. so i guess the problem is at the reciever side and not at the controller.
is there any way to solved this problems?anyone,feel free to give your thought.just to give a general info for what the heck that am i doing
, its a simple remote control battery powered helicopter.it only have 2 basic movement that is up /down and rotational.so im combining 2 of these helicopter (diff frequency) just to add extra movement to this helicopter that is forward/backward.basically i`m just adding another dc motor (from another helicopter) and controlled it with diff frequency.ignore the stability of the helicopter coz somehow i manage to balance it quite good by placing the motor at the right central of gravity.
thanks