Like some of you, I also have a few likely old coin yielding spots that emi is a problem. All of these spots would almost shut my F 75 down and the T 2 wasn't much better. And, in the settings I like to hunt with with the LTD, it never faired much better, either. Although I had tried various settings in these spots and never really liked the broken tones, seemingly loss of depth, ect. this morning I decided to devote my hunt to an emi plagued field and really work with the low gain mode and or, more disc. and less sen. and see what would happen.
I started out right under the power lines in bp, 0 disc. low gain 29 sen. and 3h tones and the LTD ran very quiet. At 40 sen. emi was such a problem there would have been no way to know if there was a target under the coil. Over the next 3 1/2 hours I worked a stretch about 100' long and about 25'-30' wide...out from the power lines. All in all, I dug 32 coins and a neat Marine Aviation Training Support Group 90 coin/token, that is about the size of a silver dollar. Of the coins, 2 were silver dimes, a 42 Merc. (no, not a 2 over 1) a 64d Rosie and 2 50's wheaties. All the other coins, clad and Mem. cents, were 60's to 82 era.
All the coin recoveries ranged in depth from 3" to 6." 5-6" depth coins were very weak sounding and I can't help but wonder if I was missing 7" and deeper coins. The Rosie, though, was totally on edge at 5." On several of these coins I switched to 6 & 7 disc. and with a sen. of 50 was able to tell they were coins, but on the 5 and 6" deep ones, the tone was a bit broken. At 60 sen. right under the power lines with 7 disc. the LTD became quite chattery.
When pinpointing the targets, the tone was a bit louder. Also, once a clump of dirt was removed and the target was still in the hole, when sweeping the coil over the hole there was only a faint, if any, tone. BUT DON'T GIVE UP ON THE TARGET. Usually the next scoop or two brought the target to light.
I did find that vdi readings for the various coins were pretty accurate as well as the depth reading. Clad quarters at 5-6" were reading 82-83, clad dimes in the low 70's and nickels, while a bit more bouncy, were 28-33, but their good tone gave them away as nickels. The Merc. at 6" read 74-77 as did the on edge Rosie.
In closing, I am glad to be able to now hunt some of these emi plagued spots, but I still have a concern with the depth. Conditions however, are really dry right now, so will just see. HH jim tn
I started out right under the power lines in bp, 0 disc. low gain 29 sen. and 3h tones and the LTD ran very quiet. At 40 sen. emi was such a problem there would have been no way to know if there was a target under the coil. Over the next 3 1/2 hours I worked a stretch about 100' long and about 25'-30' wide...out from the power lines. All in all, I dug 32 coins and a neat Marine Aviation Training Support Group 90 coin/token, that is about the size of a silver dollar. Of the coins, 2 were silver dimes, a 42 Merc. (no, not a 2 over 1) a 64d Rosie and 2 50's wheaties. All the other coins, clad and Mem. cents, were 60's to 82 era.
All the coin recoveries ranged in depth from 3" to 6." 5-6" depth coins were very weak sounding and I can't help but wonder if I was missing 7" and deeper coins. The Rosie, though, was totally on edge at 5." On several of these coins I switched to 6 & 7 disc. and with a sen. of 50 was able to tell they were coins, but on the 5 and 6" deep ones, the tone was a bit broken. At 60 sen. right under the power lines with 7 disc. the LTD became quite chattery.
When pinpointing the targets, the tone was a bit louder. Also, once a clump of dirt was removed and the target was still in the hole, when sweeping the coil over the hole there was only a faint, if any, tone. BUT DON'T GIVE UP ON THE TARGET. Usually the next scoop or two brought the target to light.
I did find that vdi readings for the various coins were pretty accurate as well as the depth reading. Clad quarters at 5-6" were reading 82-83, clad dimes in the low 70's and nickels, while a bit more bouncy, were 28-33, but their good tone gave them away as nickels. The Merc. at 6" read 74-77 as did the on edge Rosie.
In closing, I am glad to be able to now hunt some of these emi plagued spots, but I still have a concern with the depth. Conditions however, are really dry right now, so will just see. HH jim tn