Overunity motor, part3, all 4 recharging bats reading at 1.400 volts now.

[MarkE]

can you loop this back to recharge a set of batteries?

He is not looping back anything.

[tinman]

can you loop this back to recharge a set of batteries?

Yes
When the transistor becomes open circuit(switches off),a current loop is created between L2,the LED and B1. What power isnt consumed by L2 and the LED in the form of heat and light, charges B1. You may put as many batteries in parallel as you like in the B1 position,and they will charge. But because of switching losses,heat and light output,the charge returned to B1 will always be less than that supplied to the system by B2

[tinman]

Now, as we have determined, the "cool joule" or what I'm calling the TMLMJT circuit we have been discussing DOES depend on the resonant tank formed by the L1 coil and the Base-Emitter capacitance of the transistor, and operates at the resonant frequency of that tank circuit. I've just done a measurement of the tank resonance using the setup pictured below, by sweeping the FG's sine wave output and reading the voltage response of the tank, looking for the maximum p-p voltage, then reading that frequency using the Philips counter. The value is in agreement with the power-on operating frequency of the circuit.

The first resonant JT ?

[MarkE]

Tinman this is the comparative result with and without a base resistor with no load.  The flyback voltage increases about 15%.

[TinselKoala]

The first resonant JT ?

The circuit clearly has more than one mode of operation. Your traces don't look like MarkE's or mine, and also look at the large difference in frequency. The "double peaks" of your traces are happening at more ordinary JT frequencies of 30 or 15 kHz (depending on whether you count the double peaks as two cycles, or one.) While the last traces MarkE has shown are at 200-250 kHz and mine is running at over 500 kHz.

I don't yet have a pair of coils comparable to yours but I'll probably find, or wind, some a bit later on.