The Gabriel Device, possible COP=8

[twinbeard]

The reason the nanoperm works is because it has a much higher permeability than the outer cold rolled steel.  As long as you respect that variable, the device should do the trick.  Here are my two strategies on this:

Layer material like this, which has a high permeability also:

http://www.goldmine-elec-products.com/prodinfo.asp?number=G16600A
This will make your inner core.  Wrap the coils, then apply a layer or two of fine iron filings/powder in a resin on top of that, then wind outer coils.

The second part is the same in the magnetite version, although the inner core would be cast in the resin with high permeability magnetite sand instead the layered material. 

Another option for the outer core would be a couple layers of windings of iron wire, perhaps.

For the most esoteric option, tho it might be costly as well, is to take a hollow plastic donut and fill it with ferrofluid, using that as the inner core.  Thats all the brainstorm I have for the moment.

Cheers,
Twinbeard

Yes,I saw that but in the interest of trying my best to duplicate with what alledgedly works (Nanoperm) I pursued this material.
Since the cost factor is so high I will revert back to plan B for now...
Fabricate my own.
I am unfamiliar with using and layering the other materials but it is another avenue.

[forest]

I used plan C  Everything from cheap steel plastic coated garden wire. I bet ordinary ferrite core would be better but I have no such with so big diameter.
I don't expect anything extra maybe a bit less input power ?

[netpoint]

@casman
Wow, that is a bit too pricey for me right now too. hmmm....

@twinbeard
I do have some materials from a magnetic shielding project I was involved with, mumetal, and in particluar Vitrovac 6025X. I don't have the permeability stats on hand but perhaps that may be a good alternative for me to make the secondary core with?

[casman1969]

Hard drive magnets on MuMetal
Have a bunch of them and I'm thinking about melting them down, along with the magnets and making a toroid out of that. Thinking out loud again...
I have already made my 1/2" diameter form (round) for the magnetite and epoxy so, for now, I'll just have to work with what I've got. Wish my steel dougnut would get here (arrgggghhhh).

[twinbeard]

@twinbeard
I do have some materials from a magnetic shielding project I was involved with, mumetal, and in particluar Vitrovac 6025X. I don't have the permeability stats on hand but perhaps that may be a good alternative for me to make the secondary core with?

that would probably work pretty well.  inner core permeability > outer core permeability.