a 24" exp. coil for my GoldStinger

[Randy Seden]

I would like to build a 24" coil for a Garrett GoldStinger and would appreciate any technical clues. First off, does anyone know what the inductance is for either of the two coils that come with the new unit? Do I just measure the inductance of the coils and just build the 24" coil keeping the inductance the same? As your aware, the Goldstingers shortfall is lack of depth and hence my need for the experimental coil. I don't care about hunting down match head size nuggets, I'm looking for placer deposits or lode, and the old claim areas I work are shot full of buckshot and 22 shells so I plan on using the Disc. mode but fully CCW (Minimum). Would also appreciate info on the patent number for the Goldstinger and its coils are? For my contribution, I'll pass along what I've come across. The USGS is selling a CD that contains all the past mineral claims in a database format that allows you to search by various items. The title is "Indices to U.S. Bureau of Mines Mineral Resource Records", Special Publication 96-2 and it's only $15! I selected county-Los Angeles,Commodity-Gold,Type-Placer and selected Search then Display and the amount of hits was amazing. Gives you the kind of claim (past producer, raw prospect,exp.) and the lat. and long. plus other info. The site is http://minerals.usgs.gov/product.html, under the heading CD-ROM, click on Digital Data Series and go down till you see the title and at the bottom is the GPO# which is 024-004-02439-9. Then go out and get the TOPO! map CD, input the lat. and long., place a marker on the claim and print out your own 7.5' map and dig!


Randy Seden

[Carl]

Re: a 24 exp. coil for my GoldStinger

>I would like to build a 24" coil for a Garrett GoldStinger and would appreciate any technical clues. First off, does anyone know what the inductance is for either of the two coils that come with the new unit? Do I just measure the inductance of the coils and just build the 24" coil keeping the inductance the same? As your aware, the Goldstingers shortfall is lack of depth and hence my need for the experimental coil. I don't care about hunting down match head size nuggets, I'm looking for placer deposits or lode, and the old claim areas I work are shot full of buckshot and 22 shells so I plan on using the Disc. mode but fully CCW (Minimum). Would also appreciate info on the patent number for the Goldstinger and its coils are?


Isn't the GoldStinger a VLF nugget machine? If so, building a custom coil will be next to impossible without breaking open the factory coil. VLF machines use a balanced coil system so you not only need to know the impedance of each coil, you also need to know the geometrical layout. Plus, a lot of coils have a few additional passive elements inside the search head.


Any patent numbers related to the Goldstinger and/or the search coil should appear somewhere on the unit or the owner's manual. I believe the USPTO requires that for patent enforcement.


>For my contribution, I'll pass along what I've come across. The USGS is selling a CD that contains all the past mineral claims in a database format that allows you to search by various items. The title is "Indices to U.S. Bureau of Mines Mineral Resource Records", Special Publication 96-2 and it's only $15! I selected county-Los Angeles,Commodity-Gold,Type-Placer and selected Search then Display and the amount of hits was amazing. Gives you the kind of claim (past producer, raw prospect,exp.) and the lat. and long. plus other info. The site is http://minerals.usgs.gov/product.html, under the heading CD-ROM, click on Digital Data Series and go down till you see the title and at the bottom is the GPO# which is 024-004-02439-9. Then go out and get the TOPO! map CD, input the lat. and long., place a marker on the claim and print out your own 7.5' map and dig!


That's great info Randy! I'll add this as a link, thanks.


- Carl