Quote from: Jack Noskills on July 06, 2012, 08:37:15 AM
barotolougos already duplicated, though not highest efficiency because of high idle current. With a bit of math and finding correct parallel cap he will get it right and happy days for us all.

Trust me, this is the real deal. Or I am blind and cannot feel heat difference of two similar light bulbs correctly. One burns my hand while other is cold. You don't have to attempt to duplicate if you dont want to, lets enjoy the summer time.

jack... i duplicated the effect and saw that this circuit resembles a current multiplier scheme as a parallel LC tank circuit is. In energy terms i did not find anything extraordinary.
And YES, i urged all experimenters especially to care about different bulbs brightness. This is quite deceptive.

for example.


i took my variac and one 75w 220volt bulb in order to flow some 0.1 amps in order the lamp to light faintly. This happens at 40 volts more or less, thus outputing the bulb some 4w. But if you pass this in your device and the 0.1 amps are of 220v tension is some 22watts (almost double). Assuming a P.F. of 1 then the second bulb will light far far more.

In other words current is not indicating of incoming power even in same resistances (bulbs) since different voltages are in play. If you cannot understand that, i cannot say anything more.

...
for experimenting shake,
Make the most efficient setup you can manage in resonable time and feed it with a standard or improvised inverter. Its easy to see input vs output.

Happy experimenting

Quote from: baroutologos on July 07, 2012, 03:52:57 AM
In other words current is not indicating of incoming power even in same resistances (bulbs) since different voltages are in play. If you cannot understand that, i cannot say anything more.

Well of course, that's basic electronics. P (Power) = U (voltage) * I (current)
Jack you should measure amps and volts on both input and output when under load, then use above formula and compare power input and output.

@baroutologos, so what ur saying is there is no overunity here?

Quote from: Groundloop on July 06, 2012, 04:19:35 PM
E2,

All switch mode power supplies such as used in computers has a 1:1 Ferrite transformer at the AC input line.
The transformers are small but could be used at lower wattage for testing purpose.

GL.

Hi Groundloop,   Thanks for the suggestion.  I had thought about that but based on what Jack was saying that they need a lot of winds and fairly high resistance or impedance on the input I didn't think the ones I've seen would work as they mostly appear to have a small amount of winds which I assume will be fairly low resistance or impedance.  I may be wrong on that and may check it out anyway as I've got dozens of those kind of power supplies laying around.

What is your take on Jack's concept here?

Quote from: JouleSeeker on July 06, 2012, 06:56:18 PM
Well, earlier today I ordered two isolation trafos that I found on-line --  on the right in attached.   $11.66 each, from Allied Electronics.
The one on the left, toroidal, is also an isolation trafo and almost did that, but cost $18.11 each... maybe next time, but soon I'll have the two little guys (1.7lbs each actually).

  I was surprised I could get these at such a low price.   

Thanks again, Jack!   lots of fun and adventure thrown in...

Good find there Professor.  While fairly low wattage it's a decent price to check this out.  I'm actually astounded at how much they want for isolation transformers these days.  It's crazy.  I know copper is expensive but some of these places must think they are using gold.  Allied Electronics is a company that's been around forever - I was buying parts from them 50 years ago (maybe even 51   ). 

Quote from: e2matrix on July 07, 2012, 02:04:00 PM
Hi Groundloop,   Thanks for the suggestion.  I had thought about that but based on what Jack was saying that they need a lot of winds and fairly high resistance or impedance on the input I didn't think the ones I've seen would work as they mostly appear to have a small amount of winds which I assume will be fairly low resistance or impedance.  I may be wrong on that and may check it out anyway as I've got dozens of those kind of power supplies laying around.

What is your take on Jack's concept here?

E2,

>>>What is your take on Jack's concept here?

I have not studied this setup well enough to determine if it works or not.

>>>to have a small amount of winds

The small 1:1 Ferrite transformers used in PC power supply can easily
be taken apart and new windings added.

I think that one way to test this is by building an oscillator at the input and then
measure the power in vs the power out at DC level.

GL.