Total posts : 45366
I have stopped bothering with range tests for these little FM transmitters. It has always been about the same. I drive down the driveway (100-feet) it gets slightly noisy, down the street about 3 houses it starts to drop like a helicoptor out of gas.
This small differences between a few dB doesn’t make these things jump to life.
Keep in mind, I am using the manufacturers antennas.
The only way to boost these C. Cranes above what they do “out of the box” is get them up in the air with high-gain antennas.
The big jump in power observed by Tim suggests to me that even such rule breaking field strengths aren’t enough to cover the kind of range some are talking about.