I too was wondering the same thing. I would think if you are using a resonant mono-band antenna, or using a tuner to tune the antenna that the harmonics measure at the output would have an even less chance of being radiated. With the ubitx being low power anyway, I suspect the radiated harmonic would be extremely minute, maybe in the low 1000ths of a watt. There has got to be some math out there some where to calculate this.?
