STEORN DEMO LIVE & STREAM in Dublin, December 15th, 10 AM

[Omnibus]

This is the schematic diagram with the three probes (the last data is taken with four probes). Here R1 = 1.0762Ohms is the resistor to measure the input current (voltage across that resistor divided by its resistance), R2 = 0.1192Ohms is the resistor used to measure output current, Rcoil1 = 65.2124Ohms is the resistance of the input coil while Rcoil2 = 0.5921Ohms is the resistance of the output coil.

In the screen images -- the yellow trace is always the input voltage across the input resistor (used to calculate the input current), the blue trace is the input voltage, the purple trace is the output voltage measured across the load (resistor, coil or resistor+coil, depends on the experiment) used to calculate the output current and when there's a green trace that's the output voltage.

[Omnibus]

See how the change of duty cycle by just 10% kills the effect. The results here are somewhere around the cutoff frequency and are taken in the "proper" way, that is, the voltage to be used to calculate the output current is measured across the 0.1192 resistor while the output voltage (to calculate the output power) is measured across the resistor and the load coil hooked up in series. Let me mention also that sine wave as well as triangular (jigsaw) input also kills the apparent OU effect. Should I post the Excel data as well?

[Omnibus]

This is expanded, to see the ringing and all:

[Omnibus]

I don't wanna clutter the thread with more pics so I'll say it in words -- the ostensible OU effect seems to be critically dependent on the pulse generator offset. It is maximum at a certain negative offset. Before and beyond that the effect decreases and even disappears.

[teslaalset]

The ostensible OU effect seems to be critically dependent on the pulse generator offset. It is maximum at a certain negative offset. Before and beyond that the effect decreases and even disappears.

That is a remarkable finding.

I expect the optimum offset of the generator shifts if you use different resistor values as load to the secondary coil. If you have the time available, could you do that experiment?