Muller generator replication by Romerouk

[qvision]

Use magnetite.

It is superior to even metglass.

Watch these videos :

Dr. Peter Lindemann Speaks on Magnetite Core Material - YouTube

Magnetite Cores - YouTube

Magnitite Cores 2 - YouTube

It is cheap, highly effective as either a drive or a generator core and it's what Muller used.

[meryl.anny]

Make your own cores out of magnetite :

Magnetite Sand (Iron(II,III) oxide, Fe3O4) - 400 Grams | eBay

Use epoxy resin as a glue, making the mixture very thick, containing as much magnetite as you can pack into the volume of space inside your coil-former.


magnetite core - Google Search

Do you think it's better to use magnetite cores or iron powder cores ? I was leaning towards iron powder. In any case, I think the cores are build the same way,. I might try both.

[qvision]

Make your own cores out of magnetite :

Magnetite Sand (Iron(II,III) oxide, Fe3O4) - 400 Grams | eBay

Use epoxy resin as a glue, making the mixture very thick, containing as much magnetite as you can pack into the volume of space inside your coil-former.


magnetite core - Google Search

[elias]

Hi Elias,

You may wish to check Romero's cores data, he used an OD=6mm with 15mm length ferrite cores taken from PC power supplies. So his cores length were the same as his coils length.

Thanks,
Gyula

Thank you, corrected, I meant the diameter. Yeah I have some.

[ewizard]

If you are in or near the U.S. this is an excellent source for Litz wire:
Litz Wire

[meryl.anny]

am looking for Iron dust too. any body ?

Perhaps we should make our own iron dust cores using raw iron powder. We need to find a way to glue that powder together to form a rod though.

iron-powder: Iron Powders for Soft Magnetic Products

I could find some cores, but not with the correct shape. Obviously, it's not supposed to be bought by just anybody. Merchants I have found are targeting companies.

[toranarod]

Does anyone have an opinion on the following ready made coil?

Audio Crossover Inductor 6.01mH - 7.00mH SP056 from Falcon Acoustics, The Leading Supplier of DIY Hifi Components.

wattsup

I like this one

Audio Crossover Inductor 1.01mH - 1.20mH SID100 from Falcon Acoustics, The Leading Supplier of DIY Hifi Components.

[toranarod]

Thank you, I asked for the 7 strand wire described by Romero, 100 or 200 meters long. i'll let you know of the results (if anybody is interested)

they have it that's where i purchased it from

5.6mH Crossover Inductor - Jaycar Electronics

Audio Crossover Inductor 1.01mH - 1.20mH SID100 from Falcon Acoustics, The Leading Supplier of DIY Hifi Components.

[meryl.anny]

wires.co.uk : Stranded Enamelled Copper Wire

Thank you, I asked for the 7 strand wire described by Romero, 100 or 200 meters long. i'll let you know of the results (if anybody is interested)

[ron48]

Found this out about iron dust core hope it helps
Slider2732 may have some laying around in his spares
APPLICATIONS for iron dust cores :
1.For power sources of TVs, audio equipments, copiers, printers etc.

[Matthew Jones]

Get a hold of your local machine shop and offer to clean the bench grinder with a magnet.
Thats if your on a budget....
Matt

[toranarod]

reply of post #153125

I wanted to check that my calculation was correct ... I took an average of 12mm diameter per turn (lower on the inside of the bobbin, larger on the outside).

One turn: 12E-3 * pi = 17.3 mm
One bobbin, 300 turns: (x300) = 11.31m
19 bobbins: (x19) = 215 meters

I think for the moment, I'll just make 1 driver coil and two generator/experimentation coils. Do you think it's necessary to double the coils (one on the bottom and one on the top of the rotor)?
(respectively 35 meters and 70 meters if I double the coils)

And do you have any links to suppliers for litz wire and iron dust cores?

Thanks

Sorry for this load of questions I hope to contribute more constructively in the future.

Meryl

wires.co.uk : Stranded Enamelled Copper Wire

am looking for Iron dust too. any body ?

[toranarod]

I agree with this. I made some changes today and got good results at lower speed. I am using MU metal core but am looking for Powdered Iron.

[meryl.anny]

reply of post #153125

I wanted to check that my calculation was correct ... I took an average of 12mm diameter per turn (lower on the inside of the bobbin, larger on the outside).

One turn: 12E-3 * pi = 17.3 mm
One bobbin, 300 turns: (x300) = 11.31m
19 bobbins: (x19) = 215 meters

I think for the moment, I'll just make 1 driver coil and two generator/experimentation coils. Do you think it's necessary to double the coils (one on the bottom and one on the top of the rotor)?
(respectively 35 meters and 70 meters if I double the coils)

And do you have any links to suppliers for litz wire and iron dust cores?

Thanks

Sorry for this load of questions I hope to contribute more constructively in the future.

Meryl

[toranarod]

Does anyone have an opinion on the following ready made coil?

Audio Crossover Inductor 6.01mH - 7.00mH SP056 from Falcon Acoustics, The Leading Supplier of DIY Hifi Components.

wattsup

coil is OK. The ferrite core that's is another problem. I think Iron is better
other than that I use theses cores Same application just Iron core.

I am starting to look for other types Now.

My core