DD coil for Eldorado

[sadowski25PL]

Hello,
I have a small problem.

Somebody can tell me how much wire use to wind D coil for eldorado, and amount of windings?

I Think About 27cm diamenter.

Tx = 5,5mH or 6,0mH
Rx = 6,5mH

I use 0,28mm coil winding wire.
And two part epoxy glue
Aluminium tape for shield.

Dimensions, size etc. in attachment.

Cheers,
Sadowski, Poland

[diggerbarns]

eldorado coils

about 140 turns both coils the same

[sadowski25PL]

With 140 turns of 0,28mm wire will be some about 7mH...

Tx must be 5,5-6mH this is with 0,28mm ~110Turns
Rx = 6,5mH will be ~129 turns.

Today or tommorow I will do 4-5 coils ( 3x Tx and 2x Rx) Poliester Resin will be good as a glue for coils?
I have about 1kg of that Resin.

[sadowski25PL]

Hello,

And the coil winder has been made







Rx coil 6,49mH

[remus_im]

With a coil diameter of 50 cm, depth detection will be improved? I mean the larger objects