F75 hot on iron..what do you do?

[TEXAS TREASURE PIRATE]

i have been hunting with my F75 for a couple months now, i usually run my DISC level at 25 or so, and my sens at 65 or higher depending on the amount of trash in the area.

i honestly cant complain about much of anything EXCEPT, the amount of flat iron and old bottle caps i dig! i know that the DD coil has allot to do with it, but being sick of just digging iron got me bench testing every little thing out on the detector to see what i can do to maybe cut back on digging so much iron.

first, what i noticed was when i pick up a signal that turns out to be iron, it usually gives me like a 90-99 id # and its kinda jumpy, so thats one way to know that its iron, but sometimes it will give me an 80-99 reading... i just cant help my self, i have to dig those signals..but of course..its iron..again!

my next thought was to just notch out 99-91 seeing as silver half's come in at around 81 or so, but the disc only goes to 65...so that didn't work.

next i tried out all different tone levels and processes, honestly the Bottle Cap process didn't make much of a difference than the Default, which i like to keep it in most of the time, it seams to be the most stable.

the best process i found to run to block out allot more of that iron is the DELTA PITCH...(sounds like a sweet scifi movie!)
anyway...that seemed to break up the iron sound a little bit more, and still maintain good depth and good target seperation, im going to go field test this method tomarow, so i will let you know how it worked.

does anyone else have a way at not digging so much iron?
i would love to hear some more input on this.

HAPPY HUNTING!
TTP

 

[jim tn]

I'm not sure one can eliminate those smaller pieces of iron 100 percent. The one's that get me also are the 90(+/-)readings as the one half I've found with my F75 hit on 90-91, so I always dig them. I think it is just to continue to dig and learn. As you've mentioned, bottle caps are bouncy and also will often give a faint squeal at the start of the swing. But, those old rusty caps can be foolers. HH jim tn

 

[thompy]

not sure on the f-75 but on the t-2 i get a lot in the 80's range, usualy set disc. on 10 defalt to 23 and run in 2 tone. i get a good tone one way then a slight grunt to good tone the other. most of my sites are loaded with iron from the 1860- 1890's

 

[Charlie P. (NY)]

I've been running 18 discrimination and I don't dig much iron, though large enough pieces break past that discrimination level.

When you get one of those "iffy" hits try lifting the coil as you sweep two feet side-to-side over it. If it gradually drops to lower TID numbers it is iron. If it just suddenly stops displaying without falling it is not iron, unless very shallow (few inches). Sweeping from side-to-side and then frong-to-back (the 'ol DD trick) will also usually give different TID signals with iron. Except a round piece like a washer or steel cap. But, if you hop more than 4 or 5 on the TID numbers or get a "click" or "chirp" uneven tone on either end of the sound it is not a coin. If it stays within one or two in one of the coin ranges, dig. But, if you want deep, older coins be prepared to dig some trash. The readings are outside the 30/31 Nickel, 58/60 zinc cent, 68/71 older cent/dime, 78/81 quarter & clad dollar and 84/86 silver half ranges. I dig any hits in those ranges that don't hop around much. Ignore the 21, 45, 36, 65 (foil, steel cap, pull tab, Al. twist cap). I do get fooled by the occasional flat oval pull tab, but hit enough finger rings to keep me trying. I also have days where I dig everything, or every third even if I am pretty certain it is trash. That helps me learn, and occasionally I find a surprise like a key, pin or silver chain.

I find switching to All Metal also exposes the iron for what it is in most cases.

You have to interpret all the signals, video and audio. That's why it takes time to learn any given detector.

 

[goldsmith001]

If you go to the F75 classroom, on June 27th at 12:17 pm this was pretty well covered, try that and see what you think. With the faster sweep speed, bouncing numbers, and non-solid sounds, you should be able to eliminate most bottle caps. With that being said, you should dig if in doubt, there will be times when it will be a coin if it's being masked or altered because of nearby metal and or if the coin is on it's side. Dig a couple hundred of those iffy sounds, then you should be on the road to success. I like going to the beach where the digging is easy to do my testing and experimenting. HH
Ken

 

[GoldenRoyBoy]

I find large targets usually read good. If you raise you target 8 inches of so off the ground and still get a good sound, changes are it's a large piece of junk. Coins generally won't respond once you raise you coil in this method.

Regarding your DISC settings; I use AMM and rely strictly on the display. I dig very little iron except for bottle caps.

GRB

 

[TEXAS TREASURE PIRATE]

so, i didn't get to go out today and field test the DELTA PITCH program for the F75...too much rain, so! tomorow maybe..if the blasted rain will stop!
HAPPY HUNTING!
TTP