I've been a relic hunter for the last two years, but I've decided to branch out into coin and jewelry hunting. I have been clad hunting a few times now with the Xterra 70 and have done fine, but its been brought to my attention that for gold jewelry I really need something a little higher in frequency. I bought a 10.5" 7.5 kHz for relic hunting with this machine, figuring it would cut down on the annoying bits of high conducting trash and make it easier to distinguish the sounds of iron. If I were to get a high frequency coil (9" or 10.5") for coins and jewelry, is there any method to avoid/hear those annoying bits of aluminum can slaw, siding bits, and other small high conducting junk? Or, am I going to be reduced to digging all?
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Best method for coin and jewelry hunting
- Thread starter Canewrap
- Start date
BarnacleBill
New member
Hi CW,
Let's make sure we're using the same terms. Understanding that larger & thicker items skew the ID# higher.
High Conductivity Items with a high ID#: Use a lower frequency coil.
Silver & Copper coins.
Silver rings.
Silver pendants.
Low Conductivity Items with a low ID#: Use a higher frequency coil.
Nickel coins.
Platinum
Gold
Lead
Exception....very small & thin hammered silver coins...they simply lack mass.
Middle frequency coils....the best & worst of both worlds.
In regards to aluminum trash & foil. Yes the higher frequency coils will hit it harder, and yes you're going to have to use how a target sounds, it's size, & it's shape if you want to hunt gold jewelry.
Gold jewelry hunting= .22 cal cartridges, all nature of rifle & pistol slugs, lead sinkers, lead shot, musket balls, foil & more foil, pull tabs galore of all shapes & sizes.
Coin hunting is soooooooo much easier, kinda like taking a vacation after gold jewelry hunting.
Dear coin hunters....
HH
BarnacleBill
Let's make sure we're using the same terms. Understanding that larger & thicker items skew the ID# higher.
High Conductivity Items with a high ID#: Use a lower frequency coil.
Silver & Copper coins.
Silver rings.
Silver pendants.
Low Conductivity Items with a low ID#: Use a higher frequency coil.
Nickel coins.
Platinum
Gold
Lead
Exception....very small & thin hammered silver coins...they simply lack mass.
Middle frequency coils....the best & worst of both worlds.
In regards to aluminum trash & foil. Yes the higher frequency coils will hit it harder, and yes you're going to have to use how a target sounds, it's size, & it's shape if you want to hunt gold jewelry.
Gold jewelry hunting= .22 cal cartridges, all nature of rifle & pistol slugs, lead sinkers, lead shot, musket balls, foil & more foil, pull tabs galore of all shapes & sizes.
Coin hunting is soooooooo much easier, kinda like taking a vacation after gold jewelry hunting.
Dear coin hunters....
HH
BarnacleBill
Thanks BB, so would you consider the 7.5 kHz a medium frequency coil or a low frequency coil? I always thought something in the 10-20kHz would be considered a medium frequency. That's why I was confused the first time I read that the 18.75 kHz coil was a HF coil. So, it would seem that for general clad and jewelry hunting the 18.75 kHz coil would be the best tool and for old coin and relic hunting the 7.5 kHz would be better, for depth and discrimination. Do I understand that correctly?
BarnacleBill
New member
Within the choices available for the X-Terra it works out this way.
The 3KHz is the low and best for silver & copper.
The 18.75KHz is the high and best for gold jewelry.
The 7.5KHz is the medium and a compromise between the other two, therefore being good on both types of targets.
Within the general marketplace the lowest frequencies are around 2.4KHz & highest 19KHz for general coin & jewelry detectors. So you are correct that 10KHz to 12KHz would be considered medium. Tesoro seems to like to build detectors in that range, whereas others like White's seems to gravitate towards 6KHz. That lower medium 6>7KHz seems like it would have an advantage with mineralized ground and better iron discrimination.
So the 7.5KHz is the better combo(clad, jewelry, relic) hunter within the Terra universe. That's why it is the stock coil frequency.
HH
BarnacleBill
The 3KHz is the low and best for silver & copper.
The 18.75KHz is the high and best for gold jewelry.
The 7.5KHz is the medium and a compromise between the other two, therefore being good on both types of targets.
Within the general marketplace the lowest frequencies are around 2.4KHz & highest 19KHz for general coin & jewelry detectors. So you are correct that 10KHz to 12KHz would be considered medium. Tesoro seems to like to build detectors in that range, whereas others like White's seems to gravitate towards 6KHz. That lower medium 6>7KHz seems like it would have an advantage with mineralized ground and better iron discrimination.
So the 7.5KHz is the better combo(clad, jewelry, relic) hunter within the Terra universe. That's why it is the stock coil frequency.
HH
BarnacleBill