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

[powercat]

New upload of censored video
Steorn examine attempted replications of Orbo Technology
http://www.youtube.com/watch?v=WufEKt6iHB4

[PaulLowrance]

Has anyone tested with an inductance meter, using dual magnets?

btw, a way of measuring inductance without an LCR meter is to place an AC signal across an inductor in series with a resistor and measure the AC voltage across the inductor. Or here's a good inexpensive new LCR meter for just over $40 -->

http://cgi.ebay.com/DM4070-2000uF-3-1-2-Digital-LCR-meter-w-self-discharge_W0QQitemZ250522725975QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3a54516e57

Amazing resolution:
0.1uH resolution
0.1pF resolution


There's a cheaper LCR meter for about $27, but it's resolution is about 10 times worse.

[PaulLowrance]

Hey, I just calculated the permeability of the Steorn core, and I come up with 2.7 million!!! That's about 27 times higher than Mu-metal. There's a closeup view of the toroid to get a good idea how many turns in Steorn video 3 of 5 @ 2:47 time mark -->

http://www.youtube.com/watch?v=EMOTqzjm8eM

I get ~ 24 turns. In order to get 985mH in a core that size it takes a permeability of ~ 2700000.

What kind of freaken material are they using???  The highest I'm aware of is sold by Metglas, nanocrystalline & amorphous, and it's about 1 million.
Quote from Metglas,

http://www.metglas.com/faq/?faq_id=35
"Question: Which Metglas product alloy has the highest permeability?
Answer: METGLAS2714A ribbon which has the highest permeability, exceeding that of crystalline Supermalloy"

The permeability of METGLAS2714A is 1 million -->
http://www.metglas.com/products/page5_1_2_6.htm


Mu-metal permeability is 0.08 to 0.1 million. I think my estimate of 24 turns on their core is close, and the core is ~ 1" OD, so I would just love to know where Steorn got that magnetic material.

[Staffman]

Looking at that 76 material above, it would have a large output based on what Steorn was saying about changing inductance. If we started with a magnet field strength of 0.4 T (permeability ~ 4000) at TDC then turned the coils off when the field moved away, so the field strength is now at 0.15 T (permeability ~ 14000), then the energy gain would be close to 3.5 units more then we put into the coil. I think they are definitely on to something big.

[captainpecan]

Hey, I just calculated the permeability of the Steorn core, and I come up with 2.7 million!!! That's about 27 times higher than Mu-metal. There's a closeup view of the toroid to get a good idea how many turns in Steorn video 3 of 5 @ 2:47 time mark -->

http://www.youtube.com/watch?v=EMOTqzjm8eM

I get ~ 24 turns. In order to get 985mH in a core that size it takes a permeability of ~ 2700000.

What kind of freaken material are they using???  The highest I'm aware of is sold by Metglas, nanocrystalline & amorphous, and it's about 1 million.
Quote from Metglas,

http://www.metglas.com/faq/?faq_id=35
"Question: Which Metglas product alloy has the highest permeability?
Answer: METGLAS2714A ribbon which has the highest permeability, exceeding that of crystalline Supermalloy"

The permeability of METGLAS2714A is 1 million -->
http://www.metglas.com/products/page5_1_2_6.htm


Mu-metal permeability is 0.08 to 0.1 million. I think my estimate of 24 turns on their core is close, and the core is ~ 1" OD, so I would just love to know where Steorn got that magnetic material.

This looks like they are using the same toroids for all their demo's.  I see many more than 24 turns here, and judging by how narrow the center hole is, there is quite a few layers also is my guess.  Depending of course on the actual size of that toroid, my guess is they are upwards of 250 turns easily.  Maybe near 500.  This could put them right back down into the ferrite core to mumetal range again easily.