cComega virtual coil

[Fred]

Your proposal is not efficient.Aziz

Ok Aziz, don´t loose you time if you see it will not work.

So we can directly compare coils together and we can work out best coils ever designed.Aziz

I guess you have found a pretty good design...i´m curious,hope you will be able to show it...
Regards,
Fred.

[WM6]

Following this idea, we could get this coil:
The DO coil
Easy to build.
regards,
Fred.

Very well Fred. You read my lips. My first sketch of "simplified omega" "(as Aziz say) was the same as yours. But both were kicked by Aziz. My next sketch is, at least visually, near to your last. Let see if Aziz application still discriminate (maybe it is out of phase) our design:

This is second best coil every made, named DoD (much better to visual pinpointing than DD):

[Esteban]

Don't forget the oval coils

[Esteban]

Probably they don't perform well in mineralized soil, because compression of the transmit field unbalances the coil. For mineralization, the best coil to have is one that is purely symmetrical... concentric is good, DD is better, OO is even better.

- Carl

P.S.-- The earliest reference I know of to the omega coil is a 1969 patent.

The same year of the GD-48 Heathkit? His coil is type omega. The Heathkit's kit come with assembly manual and schematic.

Also look here a metal detector with D-D coil patented in 1938 (filled in 1936)

[Aziz]

I am sorry, but I can not do more calculations now. I am coding very important features of the coil software.

Estaban, very interesting patent. Thanks.

WM6, very good coil design. Combination of two different radius OO coils. It will work. We have to wait for efficient factors to able to compare coils.

Fred, sorry, I have not checked your last coil proposal. Next time.

Regards,
Aziz (very busy at the moment).

[Fred]

Very well Fred. You read my lips. My first sketch of "simplified omega" "(as Aziz say) was the same as yours. But both were kicked by Aziz. My next sketch is, at least visually, near to your last. Let see if Aziz application still discriminate (maybe it is out of phase) our design:

This is second best coil every made, named DoD (much better to visual pinpointing than DD):

Hi WM6 ,
This one looks nice,but when i was building a DD coil once i shaped it in a similar way;unfortunately i was not able to reach nulling, unless center "loops" get so large it was looking again as a DD...
But maybe under special configuration it can work...hope so.
Regards,
Fred.

[Mrand]

The festival of coils is lasting. I'm adding my proposal up also. It is entirely regular head . Blue - Tx, red - Rx. It's only theoretical proposal. I wasn't checking this in practice. He looks pretty well

[Aziz]

The festival of coils is lasting. I'm adding my proposal up also. It is entirely regular head . Blue - Tx, red - Rx. It's only theoretical proposal. I wasn't checking this in practice. He looks pretty well

This will work pretty well without checking it. The RX coils are operated in differential mode. The TX field is not chanceled and has maximum possible magnetic field.

Is this a test?

[Mrand]

I guess that the probe will be working However work perhaps better or more wrongly. The optimalisation is necessary. Is appearing that proportions are very important, the diameter of the Rx coil and the gap between sections. How setup will be better for coins and big objects. Without doing experiments I am not able to answer it.
Mrand

[WM6]

Hi WM6 ,
This one looks nice,but when i was building a DD coil once i shaped it in a similar way;unfortunately i was not able to reach nulling, unless center "loops" get so large it was looking again as a DD...
But maybe under special configuration it can work...hope so.
Regards,
Fred.

As I remember have the same experience (shaped back to DD, I don't know no more why). But probably it worth to try again.

[Aziz]

Does anybody know, where can I get ferrite core powder (high µr, very low conductive)?
Aziz

[Fred]

Does anybody know, where can I get ferrite core powder (high µr, very low conductive)?
Aziz

What about breaking and pulverizing a an old line transformer core from a scaped TV or monitor ?
I don´tknow if it will suit your mu needs...
After all you ARE "directing" the field by some artificial means
Regards!,
Fred.

[Aziz]

What about breaking and pulverizing a an old line transformer core from a scaped TV or monitor ?
I don´tknow if it will suit your mu needs...
After all you ARE "directing" the field by some artificial means
Regards!,
Fred.

Hi Fred,

this is a good idea. It causes too much work . And the wire can be recycled too .
Filling the whole coil would make it quite heavy (some kg). But for small coils, this could be quite good to increase the overall performance. For instance for pin-pointing small coils. Just an idea, to make some practical experiments.

Aziz

[hung]

omegas

Hi Azziz,
I'm doing some experiments with omegas and some posts ago you mentioned different results for TX2 inn transmitter coil, regarding diameter related to the round RX coil.
Did you get to any conclusion?
By using you software analysis, can you tell if a bigger TX2 diameter related to the RX coils is better?
Also, which is the best size ratio for the RX coil in relation to TX coil? Eg. 4 times less than TX, 3 times less...
By using a software modeling you reach faster results than actually building them.
Thanks a lot in advance.

[Aziz]

Hi hung,

Hi Azziz,
I'm doing some experiments with omegas and some posts ago you mentioned different results for TX2 inn transmitter coil, regarding diameter related to the round RX coil.
Did you get to any conclusion?
By using you software analysis, can you tell if a bigger TX2 diameter related to the RX coils is better?
Also, which is the best size ratio for the RX coil in relation to TX coil? Eg. 4 times less than TX, 3 times less...
By using a software modeling you reach faster results than actually building them.
Thanks a lot in advance.

I have not analysed this further yet. I have to implement some coefficient factors to see how efficient the coil is. I am just working on this. So the analysis can then go on. Yes, I was boring making dozens of coils. Now I can desing the coil on a model, optimize it and making finally the prototype. The software helps me even to find very novel coil designs (patentable).