| | Quote: | | | Posted by Florin | | | |
| thank you for your response Mr: Cornelius, of sure is not the first time but something like yours i had done before and even me i don't know yet the depth of it .thank you anyhow. my regards Florin
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Depth of detection is dependent upon too many factors to answer this question. Please just build it or build another machine. The size of the object, the coil size, the soil condition, the soil consistency, the soil composition, moisture, temperature, battery condition and a host of other lesser important things determine the depth. Anyone who tells you otherwise is putting you on.
As a rule of thumb, here are the detection superstars in a general format.
1. Magnetometers - inches to millions of miles.
2. Ground Penetrating Sonar - feet to 200 yards or better in water.
3. Ground Penetrating Radar - feet to yards in dry soil. Water will decrease the range to almost nothing.
4. Two Box VLF - 1 to 15 yards maximum.
5. Pulse Induction Detector - inches to 2 yards in almost any condition.
6. Induction Balance Detector - inches to 30 inches.
7. VLF/TR - inches to 26 inches.
8. BFO - inches to 20 inches.
In each of those estimates, I based the detection depth on the optimum target. For example, a magnetometer can detect an asteroid at 20 million miles or more if you focus it on the area of search. A two box unit focused on a shoe box sized object can be detected at around 15 yards and bigger objects at no greater than that distance. All others are using a 25c coin as a basic reference. Your own tests may vary so much that even this rule of thumb can be wrong.
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It's all about that moment when metal that hasn't seen the light of day for generations frees itself from the soil and presents itself to me.
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