Self running coil?

[NextGen67]

An ALD110800A, requirers very little energy to switch on, has C's next to nothing,
but it's RDS on is at some 500 Ohm if i read the specs correct. Also the max of it is 10Volt.
but well... 0.1 volt threshold is quite something.

I take the slow way, like to see Luc's results between the mentioned Mosfets (or comparable types)...
See the return Cap charge that they can deliver... Pick-up coil I see as secondary to fix it's problem.
Tough Luc's seems just now to got some 350uA (123uW), while still adding a little bit in the bulk Caps.

--
Nextgen67

[mscoffman]

Nexgen67,

ALD110800A is not a power transistor...Rds = 500Ohms is
unacceptable if driving a 6ohm coil.

[MeggerMan]

@Gotoluc,
Hi,
I've not posted on this forum for over a year I reckon, but your experiment looks very promising.
Have you checked to make sure that no power can be added to the output through the gate of the mosfet?
There is a lot on this thread to read through.
Also I am still not sure if your coils are wound so the 2 coils appose each other, just like in a common mode choke.
In common mode chokes you can have split winding and parallel winding, yours is split.
The fact that your inductance is so high (more than the sum of the two) would indicate these coils are not wire in common mode config but are wired in series.
I have lots of cores to test out this idea with and a dual pulse circuit to allow the pulse current to be made square. (Thanks to Paul Lowrance and his mini orbo pulse circuit).
http://globalfreeenergy.info/2010/03/

Rob

[NextGen67]

Nexgen67,

ALD110800A is not a power transistor...Rds = 500Ohms is
unacceptable if driving a 6ohm coil.

I know, that is why I didn't include a data sheet. But just to mention that
*might* everything go well and positive, there are probably some jewels of
mosfets around if we hunt long enough.

Also, luc's above post [ http://www.overunity.com/index.php?topic=8892.msg234171#msg234171 ]

comes to more then about 1/4th already of what is needed to run the circuit...
If I'm correct [its late and my mind is blur], his mosfet there needs 450uW to
operate, and the pick-up is delivering some 123uW... That's not bad already.

EDIT: yes, thought already something is wrong... Think its more then 2,80mW is
needed... In such a case we're far from powering it yet.. To late already, need
to hit the dark room.

--
NextGen67

[gyulasun]

...
Also, gotoluc could put the 100ohm resistor into the gate circuit
and show that it doesn't effect things there. Then the current
waveform going into the gate of the mosfet could be directly
seen and be measurable. Also reductions or increases with other
transistors would be measurable as a change in current.

:S:MarkSCoffman

Hi Mark,

But Luc has been putting the 100 Ohm resistor in series into the gate circuit you must have missed that.   He showed actual scope shots already taken directly across the series 100 Ohm, see here the waveforms (click on the quote's link in bold just in next line):

.....
Link to video demo: http://www.youtube.com/watch?v=MX2nZSOhxfc

1st Shot is Scope probe across Generator input, the other probe across a 100 Ohm resistor in series with Generator ground and coil tuned to send back most energy.

...

It is unusual to place a series resistor into the Ground wire instead of the "hot" gate wire BUT it is equivalent as long as the circuit to be measured is GND independent and the signal generator GND does not meet with the GNDs of any other measuring instruments used. In Luc's setup this is nicely met.  This way Luc solved the problem that his two channel scope inputs have a common GND.

rgds, Gyula