Finally got a nice day here and spent 5 hours out playing around with the F 75 LTD high gain and low gain settings.
I selected a spot I hadn't been to for a while, a good size field with power lines on three sides and occasionally would give my regular F 75 fits. None the less, I had hunted the spot pretty hard over time, as on my first two outings on the spot it had yielded me a Standing Lib. half, 2 silver Washington's, 4 silver dimes and on a later hunts, more silvers and a 10k high school class ring. The latter of which, I was able to return to its owner.
Anyway, when I started out, right off, emi was a problem in the bp mode and 0 disc. with sen. of 87. I was still getting chatter to well under 50 sen. so I dropped it all the way down to 29, the low gain mode and it ran quiet as a mouse. So quiet, I finally dropped a quarter on the ground to see if the LTD was working. It was! I hunted along and dug a couple clad dimes and 1 wheatie at depths to about 4." I then got a faint, kind of broken signal with the vdi bouncing from 29 to into the low 50's. That one peaked my interest and it turned out to be a nickel partially slanted at about 7." Shortly there after I got a decent tone hit that was a 57 Rosie at a good 5." After digging a couple of Memorial cents, I turned the sen. back up to 85 and the LTD ran stable, so I continued hunting with that sen. I got another nickel hit and I dropped the sen. back down to 29 and while the signal was fainter, the vdi was 29-31 and it was a nickel from about 5." A short time later I got a good hit that was showing a 10" depth. Being pretty sure it was a coin, I again dropped the sen. down to 29 and checked it. This time the tone was very faint, but it was repeatable. This target turned out to be a 44s Merc. at a true 7+." I also dug a pad lock, a scout kerchief slide, a few more clads and a bullet and the low gain 29 setting hit those targets hard, but none were deeper then 4-5."
The deeper Merc. dime was not the usual good high tone peep I am accustomed to hearing when running high sen., but in the 29 low gain setting, there was a soft/ faint high tone. Never the less, it is good to know that targets can be detected down to decent depths at the 29 sen. low gain setting when emi is, or becomes a problem. My old ears, however, will need some training, though, as the 6" and deeper signals are different.
More testing tomorrow.
HH jim tn
P.S. All my swinging was with the 5" coil.
I selected a spot I hadn't been to for a while, a good size field with power lines on three sides and occasionally would give my regular F 75 fits. None the less, I had hunted the spot pretty hard over time, as on my first two outings on the spot it had yielded me a Standing Lib. half, 2 silver Washington's, 4 silver dimes and on a later hunts, more silvers and a 10k high school class ring. The latter of which, I was able to return to its owner.
Anyway, when I started out, right off, emi was a problem in the bp mode and 0 disc. with sen. of 87. I was still getting chatter to well under 50 sen. so I dropped it all the way down to 29, the low gain mode and it ran quiet as a mouse. So quiet, I finally dropped a quarter on the ground to see if the LTD was working. It was! I hunted along and dug a couple clad dimes and 1 wheatie at depths to about 4." I then got a faint, kind of broken signal with the vdi bouncing from 29 to into the low 50's. That one peaked my interest and it turned out to be a nickel partially slanted at about 7." Shortly there after I got a decent tone hit that was a 57 Rosie at a good 5." After digging a couple of Memorial cents, I turned the sen. back up to 85 and the LTD ran stable, so I continued hunting with that sen. I got another nickel hit and I dropped the sen. back down to 29 and while the signal was fainter, the vdi was 29-31 and it was a nickel from about 5." A short time later I got a good hit that was showing a 10" depth. Being pretty sure it was a coin, I again dropped the sen. down to 29 and checked it. This time the tone was very faint, but it was repeatable. This target turned out to be a 44s Merc. at a true 7+." I also dug a pad lock, a scout kerchief slide, a few more clads and a bullet and the low gain 29 setting hit those targets hard, but none were deeper then 4-5."
The deeper Merc. dime was not the usual good high tone peep I am accustomed to hearing when running high sen., but in the 29 low gain setting, there was a soft/ faint high tone. Never the less, it is good to know that targets can be detected down to decent depths at the 29 sen. low gain setting when emi is, or becomes a problem. My old ears, however, will need some training, though, as the 6" and deeper signals are different.
More testing tomorrow.
HH jim tn
P.S. All my swinging was with the 5" coil.