More findings about partnered configuration. This one had came from Tesla and is extremely interesting. I think,.free energy key has hidden there.
In short, Tesla's Disruptive Disharge Partnered Coils, exibit special electrostatic pump behaviour, when the center tap of two serialy connected partnered CW/CCW coils was grounded and both partnered ends were connected together or short circuited with heavy copper bar. Both secondary partnered coils have very high number of windings and voltage transformation ratio is very high. Both partnered ends have very high AC voltage. When they were short circuited magic is on. From the center tap of both coils charges from the earth start flowing from the ground to balance charge equlibrium. Two kind of charges were attracted from the center tap point, due to alternating electrostatic AC induction. When both ends are at high potential positive half sinus wave, one kind of charges was attracted from the earth. When both are at negative half sinus, other kind of charges were attracted to achive charge equlibrium. If we find a way to catch them with strong magnetic field from primary coil and add them to the primary magnetic field we can do infinite energy boost, due to magnetic boost in the primary coil. This is an avalanche process and if we haven't properly designed energy sink, whole configuration would self-destruct to the enormous energy transfer from the ground. I am 99% sure the all Kapanadze BTGs were based on this principle. That principle is Electrostatic induction of partnered coils.
Nikola Tesla Experiments with Alternate Currents of High Potential and High Frequency
Look this - same configuration at SR193 BTG
Babat did the same in his BTG
Floyd Sweet did the same, but he had used two ferrite cores to attract charges from the Ether.