PhysicsProf Steven E. Jones circuit shows 8x overunity ?

[Magluvin]

Came up with possibly a better plan.

Its funny how ideas come together, as I was just posting with Luc a couple weeks ago, about his idea of increasing the strength of permanent mags in motor devices increases output. And what he was showing is very similar to a voice coil and speaker magnet.

Thinking about it today, having the voice coil in the concentrated flux magnetic gap, is just what Im looking for. My ecore idea might work if I go further, but the use of a speaker is much better and has more consistent field crossing all of the coil, where in the ecore really only has small portions of the coil right close to the face of the magnets, so there is inconsistency there.

I have had this 15in Soundstream Tarantula woofer(not working) layin around in my stuff and decided to pull it apart and see what we can use.

The woofer is like 40lb, most of the weight in the mag and pole sections. Mags, double stacked, about 10in dia and about 1.25in thick each. 4 in voice coil, dual coil, 4ohm each.
I forget the rated wattage but we ran 2 900w amps to them each back then no problem.
This one was from a system that the amp had issues and dumped DC. Pics below of the coil. Ill get pics of the mag tomorrow as it is at my shop in prep to remove the frame from the mag structure.

I dont think this coil will work here as the length of the magnetic gap is shorter than the voice coil. They call it overhang. Tweeters and some mid drivers generally are under hung, which is what we want so all of the coil is in the magnetic gap. So this sub, im more leaning toward soaking the mag structure to separate the mags for a more typical homopolar build. I need to verify for myself that with the mags rotating with the disk does produce currents to strengthen my drive to go further into the devices Im trying to develop.

But, I do have some nice tweeters that I have to dig out as Im super interested to try it.

Some tweeters use ferro fluid in the gap to conduct heat from the coil to the magnet structure to increase power handling. I will remove the diaphragm and coil, carefully, and cut away the diaphragm to just leave the coil and former. Then try to get rid of the ferro fluid from the mag gap and use the JB weld with Extra Iron!!  ;]  to mount the coil in the gap permanently. Then connect the led/s and test run it. My first ecore coil was only 14 turns of 26ga, so the fine voice coil of the tweeter should be many more turns, 4ohms of resistance, and more possible voltage out.  ;]

One pic shows that the lead coming to the coil was rubbed on the mag frame and current actually cut a n opening around half of the coil former. It was an old earthquake 2kw sub amp that killed it. ;]

Mags

[ALVARO_CS]

Hi Mag
I see you´r an expert in loudspeakers, so need your advice,pls.
Have you any trick or method to separate the magnet from the iron disk in which it  is glued ?
I did it once heating it over the kitchen burner (gas), but I think the magnet lost a bit of its power.
thanks
cheers
Alvaro

[Magluvin]

Hey Alvaro

Some speaker companies use different glues. I use either lacquer thinner or acetone in a closeable container and soak the assembly for anywhere from 6 hours up to 2 days for tough ones. Larger mag assemblies could take longer for the solvents to get into the larger surface areas before being able to separate. It is better to wait till things get loose. If you dont and try to break it apart you could damage you mags.  For larger mags, there are dangers of prying things apart, as when they surprisingly release, you may not have a good hold of the parts and the mags could fall to the floor and break, or even hurt yourself or somebody. Just things to think about as you go, just in case. ;]

Ive done it many times and made some of the mistakes and learned from it. ;]

Speaker repair shops use the correct solvents for each brand of speakers they deal with.

You would be amazed at what just a swab of the right stuff, how fast a rubber suspension surround can be removed and replaced. And to remove the dust cap from the cone to insert thin spacer sticks to align the coil in the mag gap so when they glue the new surround, all is centered.

If the lacquer or acetone doesnt work after waiting up to 2 days, if you make a jig that allows the iron back plate to set in, then you can try to knock the mag loose from the side with a hammer and a block of wood( pine is soft enough not to chip the mag). Just lay a folded towel on the landing strip if you have to hit it hard,  just in case. ;]

If the solvents do loosen the parts well, most of the time you might hear it. lol.  The back plate with the center pole, when loose, will be attracted to the top plate where the gap is and you will usually hear it when they make contact, because it happens hard most times. ;]

Got my tweeters.  Older Focals, Soundstream, Pioneers and Kenwoods.  The Focals are the largest, then the SS, then the Pioneers and the Kenwoods are teeny. All are neo mags.

Im going to try them as they are at first. The only thing to do is connect the leds and mount to the wheel. Just to see, why not. ;]

The worst I could imagine is that if current is generated, that the tweeter cones/diaphragms may magnetically position themselves out of the mag gap, as if it had DC connected to it. But other than that, I think it will be interesting. ;]

It would be crazy if it does anything. Will speakers be banned?  Funny thought.

Mags

[ALVARO_CS]

Hey mag
thanks a lot I´ll try with acetone first as I´ve got already a bottle of it I use to clean hands when working with epoxi.
cheers
Alvaro

[Hope]

Steve,  did this apparent OU Pout ever get proved or disproved?