Re using induction hob coil

[mwman]

Our induction hob section of the cooker packed up, the repair consisted of a total unit replacement. I asked to keep the old unit out of curiosity; I found the induction coils were wound with Litz wire with slabs of ferrite to increase the inductance.
I removed the slabs and checked out the coils parameters.

Has anuone tried to use one?

[pito]

Very good coil, did you measure inductance of it with ferrite ?
I will try it.

[mwman]

No I didn't sorry, I thought they would effect the coils sensitivity.

[pito]

No I didn't sorry, I thought they would effect the coils sensitivity. = You don't know until you check it out.

AM radio uses ferrous antennas

I am interested in exploration the possibility of using it in metal detectors. Can you tell me the hub model?
Is the black part in the photo ferrite or plastic?
Maybe you didn't throw away the ferrite, can you show a photo of it?

[mwman]

The hob was removed a few years ago, it was in a UK cooker although the hob part I found was made in Spain.

The one pictured had 126
uH inductance with the ferrite in place.
The body is made of a hard plastic