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Monte

Yes, a 6½" coil, but the Dime she recovered was down at a 9" depth.

The Tesoro coil (that they wrongly called a 5.75) is a measured 6" diameter Concentric design, and I have recovered quite a few coins and coin-sized targets in the 7" to 9" depth range with it. In my case they are both tuned to the detector in-use, with one being Bandido II µMAX that I GB for the specific location, and the other a Silver Sabre µMAX and I preset the internal GB trimmer to handle most of the worst ground I encounter.

Monte

It is easy to explain such exaggerated depth.

1. Loose pinpoint

2. Coin in fact lying at say about 2- 4" of depth

3. Vigorous hole digging till 9" of depth and hit past coin still lying in the wall of the hole

4. Coin, along with some soil lump around it, is at the end of digging fallen to the bottom of hole

5. And Voila!: "dime at 9" of depth was found".

6. Almost all of exaggerated depth findings are fallen in such missing/at bottom fallen coin case.


Mentioned 9" depth range achieved with Tesoro 5.75" coil is such one case too.
Not possible even in air test, not to say something like "dime in soil".
Tesoro 5.75" coil has very hard time to detect something like dime at 4-5" not to say at 9".
Depth of 9", is for Tesoro 5.75" coil, no matter of Tesoro detector used, pure science fiction.
I done a lot of measured tests with Tesoro 5.75" coil and measure depth with real SI meter
(not fisherman-meter) and 4-5" was always extremely cheering upper limit of detecting depth.

I would be very happy to see correctly recorded and proper executed video test that prove otherwise.