Validating Meyl's Device

On coil B, at 13MHz, the LED at receiver side turns on and the transceiver side turns off. The measurement shows that there is overunity. This is verified by hooking on the same scope channel. (My scope has slight error on different channel) However, then i switched to AC load the power is so much less and no overunity. I wonder why the voltage can turn lower than Vf of LED when I used AC load. Hooking up the probe will turn off the LED and I have to invert the polarity. Could this probing cause the AC load to be low? I remember switching to AC load the transmitter LED turns on. When the probe sucks the power from receiver's LED did the transmitter LED turns on ? Answer: The scope connects the ground point between the channel. Hence, it affects the measurement when we change the polarity.
Coil B @14Mhz without the metal ball, when the transmitter primary and receiver load ground are connected, the LED will turn on. Overunity observed.

Coil B @13Mhz and 20cm ground wire, the transmitter's LED will light up when I switched to AC and DC load. But for LED, the transmitter's LED will turned off. When I used 1m ground wire, the transmitter LED will never turn on regardless of AC load,DC load or LED at receiver side. Slight overunity observed when used with 1m ground wire. However when the amplitude is pumped up the overunity is less obvious. Overunity disappeared with higher amplitude. How about 6m ground wire?

It is weird to see that when I put the jumper for LED on transmitter side the power consumption is reduced compared to without LED jumper and the receiver power increased. Trying with LEDs in parallel does not affect the overunity power. What if the LED is in series, can I pump up the amplitude while maintaining overunity?

Does square wave improve overunity because of fast rise time and back EMF?