DIY coils for Bounty Hunter

[Eleven Cents]

I enjoy tinkering, and I'm thinking of experimenting with different homemade coils on my Bounty Hunter Prospector. I found this teardown of a 4" coil. If it's the same coil that's still available, it's supposed to be compatible with all Bounty Hunter models. I compared the pinouts described on that page to my stock 8" coil, or whatever it is. My pins 1-2 measure 5.3 ohms, and 3-4 measure 8.0 ohms. I don't have an inductance meter, but the local hackerspace might.

Does that coil design tell you anything about how Bounty Hunter detectors operate? If I understand correctly, one coil is transmit and the other is receive. Which is which?

 

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[Rick K]

Building induction balanced coils is not for the faint hearted. All VLF IB detectors (IB = induction balanced) ise coils which have seperate transmit and recieve coils which have to be balanced to null. Have a look here (if the link doesn't work google "induction balance detector coil pdf"

https://my.vanderbilt.edu/mriinterlock/files/2013/01/Induction-Balance-Metal-Detector.pdf

 

[Carl-NC]

Outer coil is TX, inner coil is RX, and the RX coil is also wound with an anti-TX bucking coil. You will need an inductance meter. If you want detailed information on how to build coils, visit the Geotech web site & forums, and/or buy the book Inside the Metal Detector.

Rick is correct, it ain't simple.