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Druid
Curious about this, 4" concentric for other more recent make & Model in your arsenal seems to be a valued tool, why not the Tesoro equivalent?

As you know, I prefer smaller-size coils for most of my search needs. Usually a 7" Concentric or smaller with just two mid-size coil exceptions. Those are a 5X9½ DD on my Nokta CoRe and a Nokta Relic.

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Druid
No depth?

Correct, not on a Tesoro model. Not nearly as good as:

→ 4" Concentric on a Fisher F44 or Teknetics Omega 8000
→ 'OOR' DD on a Nokta CoRe
→ 5" DD on a Nokta Relic, or a Fisher F44, or Tek. T2+ and Omega 8K
→ 6" Concentric on my Tesoro Bandido II µMAX or Silver Sabre µMAX.

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Druid
No better separation over the 5.75" concentric?

Possibly, Yes, it might separate a little better than the 6" Concentric on a Tesoro, but it isn't as good as the 'OOR' on my Nokta CoRe or 5" DD on my Nokta Relic or Teknetics T2+

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Druid
No place even in the worst trash contamination?

It might do better than a 6" Concentric on a Tesoro, but it doesn't work as well as the 6" on a Tesoro for general-use applications.

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Druid
Inquiring minds want to know!

Inquiring minds got my answer, for whatever it's worth.

Monte

"Your EYES ... the only 100% accurate form of Discrimination!"
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Metal Detector Evaluations and Product Reviews monte@ahrps.org ... or ... monte@stinkwaterwells.com 503-481-8147Detectors: Vanquish 540; CoRe, Relic, Impact & Simplex +; Bandido II µMAX & Silver Sabre µMAX; ORXPinpointers: Pulse-Dive .. Headphones: Killer B's 'Hornet' & 'Wasp' ... White's 'Pro Star'Note: Detectors are listed alphabetically by Brand. Models are chosen based on search site conditions.*** All working well today to make memories for tomorrow. ***