BarnacleBill
New member
Weather was decent so decided to venture out to a boat launch area on a river that is filled with cobble stones and some sand as seen in the photo below.
[attachment 48454 cobble.jpg]
When I arrived on site I GB'd the Tornado and found the sensitivity had to be set no higher than about 70% to remain stable in the cobble field. I then laid the nail in the photo below, on the ground and increased the Disc to the point where there just a minute audio tic passing over the nail cross-ways or lengthwise.
[attachment 48456 lilnail2.jpg]
I was using some Nugget Buster headphones and the audio was very well modulated, not like some recent releases whose audio is over-saturated. The reverse discrimination switch appeared to do it's job quite well with operation as follows. If a target is detected and you believe it might be iron falsing, then you pull the spring-loaded toggle switch. If the target goes silent then you dig, if the target remains solid then it is iron. If the target is iffy then it is a judgement call depending on how scratchy it is in reverse Disc.
At a particular point I ran across one of those scratchy targets that I wasn't convinced was good or bad. So I decided to dig it since it seemed 60/40 to the good in my judgement. Digging isn't easy in the cobbles so I removed about 3 inches of stones into a pile. I immediately saw the spike pictured below peek out of the side of the pile and recovered it. She's a monster nail, 6.5 inches long and 0.375 inches thick with a head the size of a dime.
[attachment 48457 bignail.jpg]
I thought OK, I can't really fault the detector for falsing on something this big and solid. I passed the spike across the coil and there was dead silence, I pulled the reverse Disc switch and received a solid signal. Hhhmmm???? I checked the hole and heard a solid signal, from about 7 inches deep I recovered a very worn wheatie pictured below.
[attachment 48455 wheat.jpg]
Pretty durned impressive for a first outing finding a penny under a monster sized nail.
HH
BarnacleBill
[attachment 48454 cobble.jpg]
When I arrived on site I GB'd the Tornado and found the sensitivity had to be set no higher than about 70% to remain stable in the cobble field. I then laid the nail in the photo below, on the ground and increased the Disc to the point where there just a minute audio tic passing over the nail cross-ways or lengthwise.
[attachment 48456 lilnail2.jpg]
I was using some Nugget Buster headphones and the audio was very well modulated, not like some recent releases whose audio is over-saturated. The reverse discrimination switch appeared to do it's job quite well with operation as follows. If a target is detected and you believe it might be iron falsing, then you pull the spring-loaded toggle switch. If the target goes silent then you dig, if the target remains solid then it is iron. If the target is iffy then it is a judgement call depending on how scratchy it is in reverse Disc.
At a particular point I ran across one of those scratchy targets that I wasn't convinced was good or bad. So I decided to dig it since it seemed 60/40 to the good in my judgement. Digging isn't easy in the cobbles so I removed about 3 inches of stones into a pile. I immediately saw the spike pictured below peek out of the side of the pile and recovered it. She's a monster nail, 6.5 inches long and 0.375 inches thick with a head the size of a dime.
[attachment 48457 bignail.jpg]
I thought OK, I can't really fault the detector for falsing on something this big and solid. I passed the spike across the coil and there was dead silence, I pulled the reverse Disc switch and received a solid signal. Hhhmmm???? I checked the hole and heard a solid signal, from about 7 inches deep I recovered a very worn wheatie pictured below.
[attachment 48455 wheat.jpg]
Pretty durned impressive for a first outing finding a penny under a monster sized nail.
HH
BarnacleBill