Misleading Power Measurement in Meyl's Experiment

Professor Konstatin Meyl has replicated Tesla's wireless system in miniature form and is selling his experimental kit. He suggested a simple DC measurement on the transmitter and receiver side by placing the jumper to the DC load. The current measurement is abandoned and assume a higher voltage at the same resistor will entail also a higher current by Ohm's law. If the DC voltage at the receiver is higher than the voltage at the transmitter, a so-called Overunity effect is present and the COP is > 1.
This is really misleading because the DC load at the transmitter is in parallel to the excitation coil at the primary side. In actual fact, when the so called "overunity" effect happens, the current going into the excitation coil is very high, while it DC load voltage is very low. The best way to measure is to lift the jumper at the transmitter; hence only powering the input coil; then, switch the jumper to ac load at the receiver and measure the input rms voltage, input rms current, output rms voltage and output rms current. So far, I have not seen any overunity gain.