Total posts : 45366
… it certainly shows that the Challenge results have to be taken with a grain of salt. I certainly would not use the results if I wanted to choose the transmitter which would give me OPTIMUM field strength, …
Just to note that the ratings shown in the DeFelice Challenge report were based on the relative fields produced by the unmodulated carriers of those systems.
Even if the radiating length of the antenna system, the carrier frequency, the d-c power input to the final r-f amplifier stage, the propagation path, interference conditions, earth conductivity, measuring equipment/settings, and the resistance of the r-f ground connection were the same for all of those system tests, that does not necessarily eliminate the possibility of setup errors in that Challenge sequence, and/or the possible biases of those who were involved in conducting and documenting that Challenge sequence.