Prospecting Mode For Deep Coins

[T-Money]

I have been hunting around the old farm here and so far my hard work has produced 1 SLQ, 1 36 quarter, 1 silver roosie, 1 merc, and about 20 wheats with the oldest dating 1918 and one beautiful 1919. I also found two 5 gallon buckets full of various ferrous and non-ferrous trash. I have been finding a lot of large iron targets(like horseshoes) down below the depth that my x-70 will detect coins. I have hunted out the lawn around the old house and the area under the old close line. I know there was activity here going back to the 1880s and I know there have to be a few 1800s coins around, but I have a feeling they may be deeper than coin mode can see them because some of the ground has been worked up year after year. Today, I took a few minutes to go over the lawn that I have already hunted out in coin mode. I put it in prospecting mode and I was able to detect targets that coin mode could not detect. I also noticed that during air tests, prospecting mode seemed to detect coins about 2" deeper than coin mode. I did not have any time to dig these targets today but It got me thinking that prospecting mode could allow me to go deeper for the older coins while at the same time discriminating out the many large iron targets scattered around. The old 1880s farm house was right on the same site as the house that is presently there(build in 1936). My grandpa told me they used to hang out on the front porch and he showed me about where that was located. Since most of the coins I have found so far have been 1918+ and I have found Iron targets rather deep under the lawn, I have a feeling that any older coins may be down where I am finding the iron, deeper than I can presently see coins in coin mode. I have been reading through the FAQ links and have read about using prospecting mode to help ID iron and to pinpoint targets, but has anyone used prospecting mode exclusively to find deeper coins? If I dig all non-ferrous targets that are deeper that coin mode will detect them, everything I dig should be very old. I am using the 6"DD HF coil.

 

[rifleman]

Sounds like it might work. You should be able to get a little deeper with the prospecting mode. You might want to invest in the 10.5" 7.5khz DD coil. It will go deeper than the 6" DD and will still have good selectivity. The 6" DD coil really is a great coil, but you will be giving up depth compared to the 10.5" DD.

Good hunting, John K

 

[coinsh00ter]

Why not try the stock coil? You should get added depth, and since you've been cleaning out the top trash it might get you those extra inches you need. After the stock coil gets the next level of trash and treasure, then go for the 10.5 coil. Just a thought. I have the 10.5 dd 18.75khz coil, and it is too hot on iron for old homesteads. I plan on looking for a trade soon for the 10.5 7.5hz or the 9" 3khz, unless I keep it for the beach.

Dave in NJ

 

[james1969]

Very deep coins on the edge of detection may produce minus number signals

http://www.findmall.com/read.php?55,696604,696604#msg-696604

http://www.minelabowners.com/forum/viewtopic.php?t=18314

 

[jeff & Maria]

n/t

 

[T-Money]

Thanks for all the input everyone. After watching those videos, I am wondering how many deep coins I have been passing over because I thought they were Iron. I am going to start digging some of those deeper targets and use prospecting mode to help me decide if it is Iron.