Originally Posted by BlueAngel2000
Your transmitter module will thank you for that.
Just some filtering before the 3,3V reg and you can power it from the 5V BEC of the ESC.
There are two versions of the module available. One comes already with a low drop regulator INTEGRATED. However, if the voltage fed into it is high, it gets hot (as it's only a linear regulator).
In answering your other question, my post centred around using the transmitter powered off the ESC which probably most people do. Using a DEDICATED battery as the power source is of course also a way to avoid said noise.