ORIGINAL: aa78
ORIGINAL: Sport_Pilot
I have two 2.4 systems neither use lipo batteries one of them is a module system that I can switch between 72 and 2.4 that is why I know that 2.4 uses less power.
I see, then they do use less. Not sure why.
Modern lower voltage digital electronics vs old analog electronics.
I suspect it may be that 2.4 Mhz doesn't need as much power to go long range, or that the higher frequency oscillators use less energy. The last 72 Mhz systems are only a few years and has integratedcircuits. The older recievers have a fairly large crystal and coil that won't fit into the newer 2.4 Ghz recievers, that might be an indication of how much power they needed. But not sure about this.