KHz help!!

[aladdin]

What mhz is best for salt / coins /gold/ jewerlry/nuggets/ relics. I hear so many things 2.5 to the multi- freq units to the gold units / any best overall freq ? Now I use mhz round bout 6.5 !! Anyone have a easy FYI answer? !! thx's

 

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[Sandman]

Re: mhz help!!

I don't think there is such an animal. There are to many variables in the areas, ground minerization, salt content at the beach, amount of black sand, etc.

 

[Charlie P. (NY)]

Re: mhz help!!

I think you want KHz, not MHz. Lower for deeper and larger, higher for smaller and less conductive (i.e. tiny gold nuggets). They range 1.5KHz for the deep relic machines up to 100KHz for the gold prospectors. Jury is still out whether one transmission of a single frequency is better than broad-band multi frequency. Some have switchable frequencies so you can set-up for the desired target.

Which is better seems to depend on who's trying to sell you on their own offerings. As you list five targets and one (salt) I assume you want to discriminate out I guess something with multiple frequencies would work best for you.

Now you've got to decide whether you want a concentric or DD coil and the delivery system: Pulse Induction, VLF/BBS or multi voltage.

 

[aladdin]

yep I mis-spelled it thx's/ I see so many things like detector-pro @ 2.5 /mxt @ 14 I would like the best overall MD It is just that no. thing I guess thanks for your help I'll keep readin and learning ! gottit

 

[Ant]

Re: mhz help!!

I think you want KHz, not MHz. Lower for deeper and larger, higher for smaller and less conductive (i.e. tiny gold nuggets). They range 1.5KHz for the deep relic machines up to 100KHz for the gold prospectors. Jury is still out whether one transmission of a single frequency is better than broad-band multi frequency. Some have switchable frequencies so you can set-up for the desired target.

Which is better seems to depend on who's trying to sell you on their own offerings. As you list five targets and one (salt) I assume you want to discriminate out I guess something with multiple frequencies would work best for you.

Now you've got to decide whether you want a concentric or DD coil and the delivery system: Pulse Induction, VLF/BBS or multi voltage.

That was a great explanation Charlie P. (NY).

The Gold Bug 2 with at 71.01 kHz has the highest kHz on the market. And is without a doubt the most sensitive on small gold nuggets and jewelry, the jewelry part I added.

 

[Jim McCulloch]

Operating frequency DOES influence several detecting factors, notably "bias" toward target conductivity, sensitivity to soil mineralization, and sensitivity to target SIZE. SIMPLY put, the higher the operating frequency (higher: 50kHz is higher than 20 kHz) then the following characteristics apply: greater sensitivity to low conductivity targets, greater sensitivity to smaller targets, but, sadly, also FAR greater sensitivty to soil mineralization. The lower the operating frequency, the greater sensitivity to higher conductivity targets, reduced sensitivity to smaller tagrets, and enhanced penetration in soil mineralization. THUS: a detector operating at 5 kHz would penetrate mineralized soil WELL for silver coins, but would not be very sensitive to small targets, or those of lower conductivity, such as gold. A detector operating at 50 kHz would be great for small targets, gold targets, but might loose depth in highly mineralized ground. Hope this helps; HH jim

 

[Ant]

WOW. Thanks for expounding on this subject Mr. McCulloch. I'll save the information you posted in my files so that I can refer to it when needed.

Thanks again.

HH and may the AU2 Gods keep shining on you.