Relevance of "All Metal" mode? It depends on the terminology and design and use.
| October 25, 2022 02:22PM |
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Diggerman
I decided to check how relevant the "All Metal" mode is?
it's always good to learn what a mode can and can't do on our detectors, as long as we understand the mode design and the site conditions wh3re we might use it.
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Diggerman
What does he give?
The first question some might have is just what is the 'All Metal' mode described by DeepTech? To ME, after all the decades i have been at this a 'true' All Metal mode dates back to the mid-'70s when we got our first VLF detectors with Ground Balancing, before they had a TR-Disc. circuitry added. It was important to adjust a proper Threshold, then GB and and hunt in a true, threshold-based All Metal mode. Most required manual retuning as there was no auto-tune, and this was a few years before VLF motion discrimination that came out in '78 so no motion was required and we got fantastic depth ... especially on high-conductive targets due to the very low frequencies.
Today we don't have the same options from many manufacturers. Tesoro offered a couple of options by design. For example, on the Inca or original Bandido you had a Threshold-based All Metal mode that featured a slow autotune when you hunted in All Metal or just used it for Pinpointing. In those modes you could manually use a pushbutton or toggle to Re-tune. The Bandido II µMAX has a Threshold-based All Metal Mode with an extra toggle to select a 'static' All Metal mode that you can toggle to manually re-tune, or select a fast auto-tune function.
Some detectors lack a true Threshold-based All Metal mode, such as White's M6 or Garrett's Apex, but they do offer a 'Zero' Discriminate mode that lets them accept and respond to All Metals, ferrous and non-ferrous, so they are a all metal accept Disc. mode, but many manufacturers refer to that as All Metal. It's not the same because it is still a motion-based Disc. mode with the Disc. mode filters involved.
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Diggerman
Is it possible that the detector in this mode sees the coins a little deeper?
It is possible, IF it is a true, Threshold-based, non-Discriminating mode and/or tuned and operated to benefit from it.
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Diggerman
I filmed a short video with an experiment on this topic, direct link to the video (English subtitles).
Your video was good, and the English subtitles was terrific and better English that I hear from a lot of folks in this country. I get a little concerned, however, seeing you in camo over in your next of the world right now.
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Diggerman
I am very interested in the opinion of other users of these detectors regarding the specified search mode.
I DO use a good, 'true', Threshold-based All Metal mode for several things:
• Pinpointing a located target, especially with little or no coil motion is required.
• Sizing and shaping a located target.
• With the right detector,, getting a little better depth over a Disc. mode. That typically means I have the Threshold audio adjusted for a slight audio in All Metal and for sure a proper, functional Ground Balance.
• One benefit of a 'true' All Metal mode is that you can use little or no sweep speed and in a more open area you can hear a target if the coil is swept close to it and not directly over as required by a motion-based Discriminate mode.
A lot of performance is governed by the adjustments a user has and the manufacturer's use of terms. A motion-based All Metal Accept Disc. mode is that and no a 'true' Threshold-based non-Discriminating mode. Now, some All Metal modes do use Auto-Tune so some coil moveme3nt is necessary, but in your video you were sweeping as briskly as in Disc. mode. If you adjusted for a slight audible Threshold tone and worked the coil slower, would the All Metal mode have performed any better? Or is it more of a zero-Disc. unction?
With the Vista-X units I had before, I mainly relied on the All Metal mode to assist with Pinpointing.
Monte
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