PhysicsProf Steven E. Jones circuit shows 8x overunity ?

[Hoppy]

Whist I agree wih TK about getting meaningful measurements, I disagree with him that mean readings across a shunt resistor are meaningless. A comparative reading is quite possible. I need to try out a bifilar coil but so far as I reported earlier, using a conventionally wound coil gives me a result way under unity as expected.

Chris, if you measure the voltage across C2 with a parallel connected 1K load (without the LED in circuit) and multply this by the shunt current or simply square the voltage across the load resistor and divide by 1000, I will be most surprised if you get anything above 60% front to back efficiency. You can do this with a DVM. I'm not sure where you are getting your output voltage from but if its across the shunt, you can't use this  to work out the power consumed by the load. All components in the output circuit will consume power at a ratio determined by their respective resistances. Most importantly, power sharing also applies to all components in the input circuit.

Hoppy

[woopy]

Hi Chris

i am crossing my fingers for your looping

thanks for sharing your remarquable work

Go on this superb work

and good luck at all

Laurent

[hyiq]

Hi Hoppy,

Thanks for your advise and encouragement! Yes, I have tried the 1K resistor in the early Circuits. You can see i have ensured I have put measuring points on my Circuits, Vout is accross C2, Iout is accross Shunt, or R4, and the same on the input side.

Although no Electronice Engineer, I agree with you and this should be a fairly comparitive measurement if only a guide, its still pretty accurate most of the time.

Below are the two circuits I have gone through and checked. It takes some adjusting, but an Over Unity Measurement is possible the way you described.

[EDIT - I just want to add, I went through about 50 different types of Fet's/Transistors/JFet's to get one that gave a nice result. Its Important that the Transistor is chosen carefully.]

All the best

  Chris

[hyiq]

Hi Woopy,

Thanks, I hope it comes off. My Fingers are crossed also. As yet, no luck.

All the best

  Chris

[Hoppy]

Hi Chris,

Thanks for posting your circuits again for clarity. Have you worked out the power consumed by L1 / L2, as this should be added to the power consumed by the shunt resistor to gain a total input power measurement?

Hoppy