Why?

[Mark-VA]

I have tried for 4 years to find a true mono "oz" coil for my White's TDI. Had one guy sell me the 7 1/2" White's coils for an OZ coil but it turned out to be the White's TDI dual field coil according to one of the engineers that worked at White's. Some of the areas where I hunt have harsher ground than the red dirt in northern Virginia. This is man made issues because of the coal slack (that easily attracts to a magnet) discarded over many decades in these areas. The TDI has found many targets that the best VLF machines could only ID as iron.

[Altra]

Have you tried a Minelab coil? The TDI was designed to use these coils, same connector. The lower shaft would have to be changed, since it has wider ears than the Whites coils.

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