Silver Coil... Anyone tried this yet?

Eugene52;

I wonder, did you read the links, you put up?

link number 1 - patent refused!

all other links - unsubstantiated advertizing, one even claimed to be using the (refused) patent.

I think you may have shot yourself in the foot..... do you work for, have stock in, or get paid by Minelab? If you don't, then your claims are credible, but unsubstantiated, as is the value of using skin-effect reduction technology at audio frequencies..... you have not made your  case, yet.

One of the links even quotes the fact there IS added expense, as well as gold this and gold that.... the added expense does NOT support the minor gain that may be achieved,  it is a money-grab. Tin is a much more durable contact material and cheap, gold is nice, but a gold alloy is more durable.... there are a thousand ways to do things, with no one way the best, and some that are the worst.

goldigger

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		Quote:			Posted by Eugene52
	After you build your Metal Detector Circuit you will then have to make a choice on what search-coil to make , a Concentric or DD configuration ? Will it have Litz wire or not ?

I'm working on building the Goldscan IV will probably go with a concentric coil to start as I hear it has greater depth. Later an elliptical, a DD, and a probe. Will not be using Litz at first as it is still up for debate, I will experiment with it(an other ideas) at a later date once I've practiced with more concrete methods.

        Allodium


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Eugene52;

I have been doing my own personal webbot crawling and have found vry mixed results.... some bear out use of silver, for skin effect control, but a several hundred kHz, others tout silver Litz, of very large size, of course, for speaker wiring (very expensive,) and I calculated a rough cost for a simple locator at around $2500 from one source.... it seems like the field has been deliberately muddled.

I did find a bit of data (largely drowned out by silver 'noise,') that says proximity effect is FAR,FAR more responsible for losses, than skin effect. Which means: thicker insulation OR wider spaced windings. This explains why DX loops, for reception, work better if the wire is separated by several wire diameters, to inches, which can not be done with metal locators. BUT, thicker dielectric (insulation) will reduce proximity effect, and can be tolerated.

I have a mass of stuff, I can upload, including some silver wire (with copper core, mostly) and copper sources. Unfortunately, I can not remove the company names and it will be like free advertising., so I got several, so as not to favour any one company. The costs are VERY revealing!

goldigger

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