Surf PI - Looked at decay curve when dunking coil in saltwater ... was not as dramatic as I thought

[Polymer]

The swell was finally low today, so I wrapped everthing up and went to the sea.

I've been building a snorkelling Surf Pi and wanted to see what happens to the curves
when it gets in the water.

The results actually amazed me and the signals were not as "influenced"...

[Tibuck19]

Coil shielding , opinions on MG Chemicals, Nickel vs Silver vs Carbon, Which would make the better shielding coating, for both PI and VLF coils. I know there is a lot of talk about scotch24 shielding tape but it is rather hard to get a hold of.

https://www.amazon.ca/MG-Chemicals-Con...

[pelanj]

I need to search a relatively small piece of land to find small silver and copper coins amongst larger pieces of iron (nails, screws, horseshoes). The easy ones have been picked up already by others. I think there are some more, not necessarily deep. Nobody likes to dig iron, me neither. Someone mentioned...

[cjc]

The White’s Surfmaster P.I. Dual Field: “An Advanced Guide”

by Clive James Clynick
Clive James Clynick is the author of eleven previous treasure hunting books and numerous articles. In this detailed and informative guide to getting results with the Whites Surfmaster P.I. Dual Field,...

[cjc]

“Pulsepower!”: Finding Gold at the Shore

with a

Pulse Induction Metal Detector

by Clive James Clynick

Pulse induction metal detectors offer awesome depth and gold sensitivity. Clive James Clynick is the author of nine previous books and numerous articles. ...

[jon-ecm]

So I thought I'd build a pulse induction metal detector.
I scraped some wire from a microwave transformer and wound
about 25 turns on a 8" pan and taped it up good
I also put a 1k resistor between the two leads of the coil
for the TX I hooked up a mosfet to a ATtiny 25 which...