Muller generator replication by Romerouk

[Mark]

I made some cores a few years ago using iron filings I got from a automotive brake lathe. Any auto repair shop that resurfaces brake rotors will have iron filings.

[wattsup]

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

[Dave45]

A core you guys might be interested in

Quote:
Originally Posted by vrand
Hi Zilano,

Is there any benefits to copper coated welding rods vs non copper coated?

Cheers Mike

Hi Mike!

MAGNET CORE (WELDING ROD)
Purpose
To provide a low reluctance path that increases the magnetic flux through the coil.
Specifications
Low reluctance, high permeability magnetic material: Welding rod; 0.042" inch diameter copper coated steel

regards

zilano zeis zane!

Hi LTBOLO
I wasn't talking about his L1 and L2 coils,those coils are ok if tuned right.
thread 14
post 409

He is using copper coated welding rods ( he calls ferrite rod/cu) in his step down to 60 hz transformer. Read above MAGNETIC MATERIAL. His transformer for getting 230 volts 60 hz is magnetic. If you don't believe me, get some copper coated welding rod, make a bundle and put 10 turns of wire on it, put 20 turns beside of the 10 turns. apply 10 volts to the 10 turn coil and you can measure close to 20 volts on the 20 turn coil.
When he said look at the crystal radio, I knew he was going to modulate the system with 60 hz but didn't know where.
Tesla coils are turns ratio tuned with caps.
Zilano even says he uses induction method in his ferrite transformer.
Maybe MR. LTBOLO you should read my last post again.

[ron48]

Below is the latest comment from romero it may be of interest to you all


Hi all,
After reading some recent posts on different forums I decided to clarify some points.
The core used to obtain speed under load can be most of the metals, laminated or not, ferrite, irondust or mumetal .
I have obtained the effect even without core just air, but that is another thing and very tricky.
I have tested all metals and got the effect but as we all know mumetal is the best because of many factors.
The biggest problem with soft metal, steel or normal lamination is the heat acumulated in the core after short period of time.
With ferrite, irondust or mumetal we don't have this problem. Ferrite is not as good as steel for the effect but because it stays almost cold is the advantage and the relative cheap price to buy it.
If someone will get the effect with steel core then replace the core with something else the effect will vanish.
Many parameters must be accounted and only after playing a lot with simple arrangements will understand every step.
After playing with all of them I decided to continue working with irondust cores.They work much better than ferrite and cheap to obtain.
When we are talking about speed under load we must understand that the load must be controlled all the time.
The resistance of the load must be maintained in the limits but that is not limiting our posibilities to use it.
Another thing I saw recently on the forums is the fact that the gain is shared to the numbers of the coils,... in my opinion is not true.
Example: having multiple coils that are never in line with another is like we have one coil only and we are moving that coil in multiple points. Multiple coils means less rpm too.We can have the same thing with only one coil but at very high speed.
We are aiming to keep the speed low.In my experiments until now high speed did not help a lot.
This effect is not enough to get much OU unless we learn how to convert or transform the energy.

Best regards,

Romero
« Last Edit: August 22, 2011, 11:50:52 PM by Romero »

[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

[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]

Below is the latest comment from romero it may be of interest to you all


Hi all,
After reading some recent posts on different forums I decided to clarify some points.
The core used to obtain speed under load can be most of the metals, laminated or not, ferrite, irondust or mumetal .
I have obtained the effect even without core just air, but that is another thing and very tricky.
I have tested all metals and got the effect but as we all know mumetal is the best because of many factors.
The biggest problem with soft metal, steel or normal lamination is the heat acumulated in the core after short period of time.
With ferrite, irondust or mumetal we don't have this problem. Ferrite is not as good as steel for the effect but because it stays almost cold is the advantage and the relative cheap price to buy it.
If someone will get the effect with steel core then replace the core with something else the effect will vanish.
Many parameters must be accounted and only after playing a lot with simple arrangements will understand every step.
After playing with all of them I decided to continue working with irondust cores.They work much better than ferrite and cheap to obtain.
When we are talking about speed under load we must understand that the load must be controlled all the time.
The resistance of the load must be maintained in the limits but that is not limiting our posibilities to use it.
Another thing I saw recently on the forums is the fact that the gain is shared to the numbers of the coils,... in my opinion is not true.
Example: having multiple coils that are never in line with another is like we have one coil only and we are moving that coil in multiple points. Multiple coils means less rpm too.We can have the same thing with only one coil but at very high speed.
We are aiming to keep the speed low.In my experiments until now high speed did not help a lot.
This effect is not enough to get much OU unless we learn how to convert or transform the energy.

Best regards,

Romero
« Last Edit: August 22, 2011, 11:50:52 PM by Romero »

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.

[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 ?

[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

[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.

[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)

[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.

[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.

[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.

[ewizard]

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