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

[PaulLowrance]

Bruce,

Sorry, I just noticed in my Elna order form that I actually have an MP2510P4AS! It cost me only $6.10. So their recent quote of $12 must be due to inflation.

That sounds right, my MP2510 cost 2.3 times more than my MP1805, but you get 2.5 times more material.

The only problem is I ordered only 1 of the MP2510P4AS. Can I make a Steorn replication with one core?

[PaulLowrance]

So what is the current best selection for the Metglas cores?
I found these at a surplus site.
http://www.surplussales.com/Inductors/FerPotC/FerPotC-6.html

This is important. Lumen, that MP1906P4AF is not a Metglas MAGAMP core. You can tell by the last letter, which is "F", which means it's a flat loop, not square loop. That has a permeability of 80000, not 1000000!

Although the other core is a MAGAMP core, part number MP1005L4AS, but that's a very small core, 10.92mm (0.43") OD.

So for those who want the Metglas core with 1 million permeability, the part number must start with MP and the last letter must be 4AS. If it ends with an "F", then it's the flat loop (transversely annealed).


 

[PaulLowrance]

Sean just posted at his form -->

Faster in what way - clearly you seem to understand the requirements for current into in Orbo - so let me ask you this - a capacitor can provide a perfectly flat current output - right?

I think Sean could not be clearer. Although IMO Sean has not clarified the reason. We know that the core has inductance, and we know that if you connect a capacitor to an inductor it resonates. Well, resonance is not a "flat current."  A battery does not resonate no where near like a capacitor, as a battery tries to be a constant voltage source.

Also, we should be careful with adding capacitance to the toroid coil. Is that another reason to use a relay instead of a mosfet, as mosfets have a reputation for having a lot capacitance for a switch. Lets not forget that 30 to 40 turns on this Metglas core gives ~ 1 Henry.

Just some food for thought.

[Bruce_TPU]

Bruce,

Sorry, I just noticed in my Elna order form that I actually have an MP2510P4AS! It cost me only $6.10. So their recent quote of $12 must be due to inflation.

That sounds right, my MP2510 cost 2.3 times more than my MP1805, but you get 2.5 times more material.

The only problem is I ordered only 1 of the MP2510P4AS. Can I make a Steorn replication with one core?

I'm not sure Paul if it would work.  I don't think that the animation is to scale, so wouldn't worry about that, but rather the math for the interaction of our rated surface gauss of our magnet(s) and the metglas toroid to make sure we have everything correct.

I did just notice something that I did not realize from their animation and have posted a pic below.

Cheers,

Bruce

[broli]

as a battery tries to be a constant voltage source.

So do ultra capacitors. So why are they ignoring that. Surely a 50$ ultra capacitors the size of a D cell battery would end all speculation.