0.4ohms to 0.66ohm coil resistance.is it okay?

[Bhathu saaii]

Hello guys. Just wanna ask if the requirement of my coil resistance is 0.4ohms and i've made it 0.66ohm. Is it still okay? If not,how could i lower down the resistance to 0.4ohms because when i tried to lessen the windings,the inductance is also getting low. What would i do?

[alex61]

helo For minlab you need .4 ohms

[alex61]

Bhathu saaii to explain .I use .2mm strands. I calculate inductance for coil size ,then number of turns then wire length ,then number of strands for .36 ohms allowing for coax and plug resistance so I have .4 ohms at the plug

[Bhathu saaii]

helo For minlab you need .4 ohms

Yes. It should be. So,i wont continue with this one? Thanks a lot brother

[Bhathu saaii]

helo For minlab you need .4 ohms

What should i do to make a good DD coil about 18inches in diameter?

[Bhathu saaii]

Bhathu saaii to explain .I use .2mm strands. I calculate inductance for coil size ,then number of turns then wire length ,then number of strands for .36 ohms allowing for coax and plug resistance so I have .4 ohms at the plug

Thank you bro..what you did is a DD coil bro? Do you have any idea how to make DD coil 18inches in diameter? For minelab gpx5000.
Do you have any idea where i could watch or view for the diy? Thanks a lot

[alex61]

SORRY I have trouble posting on this forum and no only monos

[jinbiao]

I made 13-inch and 18-inch DD probes for gpx4500, which works well.

[Bhathu saaii]

I made 13-inch and 18-inch DD probes for gpx4500, which works well.

WOW! :O that's awesome! may i know the details? please? ^_^ thank you bro! coz i've made an 18inch DD with 20awg wire and the output was so bad

[Bhathu saaii]

I made 13-inch and 18-inch DD probes for gpx4500, which works well.

anyway,may i know the maximum depth of it bro? also the other details like number of turns,no. of wire, resistance, inductance, frequency. thanks a lot bro..you're the answer to my prayer

[Bhathu saaii]

I made 13-inch and 18-inch DD probes for gpx4500, which works well.

Are you still here? please help., thanks a lot

[jinbiao]

Tx=300uh, 0.4-1Ω

Rx=450uh, 3-10Ω, parallel 1k resistor

The 11-inch single coil is more sensitive than the 13-inch DD coil. It is recommended to use a single coil.