This videos shows how to modify a Spektrum DX6 transmitter to output 1000 mW of power. This proved 4X range improvement over the stock 100mW power.
Ceramic Patch Antenna Digikey Part # 931-1171-ND
Solid State Relay for 1 watt Amplifier. Digikey Part # TLP3100(F)-ND
Amplifier is SunHans 1W. They also make a 2 channel amplifier that could be strapped to the back of the radio. I have another video showing that.
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