305 - is the 18khz coil best for nickels

[teviotlad]

hi all. thinkin of upgrading frjm the stock 9 inch 7.5khz coil to an 18khz coil. most of my detecting is beaches, so i need the best coil for nickels and gold jewellery. has anyone used both the 7.5 khz and 18khz on beach, and if so any advice welcome thanks. i find the 305 with stock 9 in conc 7.5khz is jumpy on nickels and not stable tid

 

[fwcrawford]

I have both the 7.5 khz cc coil and the 18.75 cc coil, but have not done much comparison test between the two.
My coil of choice is the 10.5" DD coil at 7.5khz due to the coverage, but this coil is not very good at IDIng nickels... at least for me.They bouce around also... some lock on good while others give various ID numbers.
I have not used the 18.75 coil much as it was given to me when I bought the detector.
I'll try to do some testing and let you know how it does on nickels.. being a much higher frequenzy, it would stand to reason that it would be more sensitive to nickels than the 7.5khz coil.

 

[oregonmetaldetecting]

I use the 18khz and for nickels and other lower conductive targets the difference is night and day from my 7khz stock coil.

 

[mapper65]

I have the 10.5" HF coil and the 10.5" MF coil. For me, nickels are more prominent when I use the 18.75 coil. I can find nickels with the MF coil but the they don't seem like they jump out as sharply as with the HF coil.

 

[teviotlad]

thanks i think i,ll get the 18k coil. want one with wide coverage for beach cash work.

 

[BADBAJA]

Nickels hit hard with my hf coil. Also a round chunk of aluminum foil will hit a solid 4 or so every time. Happens a lot on tot lots that I hit up with my boy. You think it's gonna be yellow metal but it's not. Just a reses or kiss foil in a ball. Hate those lol.

I noticed in my test garden that thin silver rings with the HF coil can be missed at 5 inches or so. I have a few more tests I am doing to tune that silver in with the HF. I will post my results.