I love my F75. Been using one for 4 yrs. one thing I hate about it is how it will give a high tone on iron. Especially big iron. I use 2F because I mainly relic hunt. But man it gets old having to go over a spot several times to determine if it's iron or not! I guess I may expect too much. Just my opinion!!
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High tone on iron?
- Thread starter pvtcook
- Start date
That's where the Confidence meter is a big help. Especially on loud, shallow signals. I hunt for a lot of Civil War relics. Most of them don't register in the 80's, unless it's a silver coin. Deeper iron can be challenging. I use the all the tools. Signal strength, Conf meter, pinpoint loudness, meter reading, and solidess of the signal in all directions. Takes practice, but it still isn't foolproof. I still dig less iron that with my ATGold.
jimmyk in Missouri
jimmyk in Missouri
REVIER
Well-known member
Just physics, some types of iron will throw off high tones picked up by most detectors no matter what brand so not just a Fisher thing.
At least there are plenty of techniques we can use to figure out this stuff, from swinging over a target one way and then from another to compare, bouncing the coil over a high tone to look for the drop and whatever else.
Maybe not 100% perfect but close enough and it doesn't take all that long...better than spending more time digging junk.
Don't think there are many detectors out there that can deal with this problem much better unless you get into imaging radar and even on that type of high tech I doubt that you could make out a rusty nail at 8" very well.
This is what the hobby is all about, learning techniques to deal with all the different target types out there both ferrous and non ferrous, great ones and trash.
You do have fun at it despite the little time it takes to gather in information to make digging decisions...using a few other brands you might find it could take way longer to do it with much less success.
I have hunted some sites so infested with iron that it almost unbelievable and have pulled out more great masked targets out of them than most others I know of because these things are so great in iron.
There are the normal indicators to give you clues and I have figured out other more obscure indicators and behavior patterns that work in dense iron too thanks to the abilities these things have.
Some newer whiz bang detectors and brands are supposed to be great at this type of hunting too nowadays but the Fishers have had this reputation for a long time before they were even invented.
I have been extremely happy with mine and the success I have had when wading into these problem iron infested sites that I used to avoid due to frustration using others, but there is one issue that seems inherent that most Fishers have that do drive me crazy.
It is rare but it does happen.
For some reason a deep pull tab at 10" will disguise itself as a solid, clean sounding repeatable high tone coin in the audio and numbers on the screen and I am not the only one that has seen this happen.
To dig down that deep and find a target sitting there at 10" or more thrills me that I have a tool that could even notice it there, to discover it was a tab and not a silver dime instead does not.
Still, you gotta take the good with the bad and using this brand I have seen way more good than bad so I always forgive mine when it makes me dig deep for no reason from time to time.
More often than not it is not wrong once you learn to understand what it is really telling you.
At least there are plenty of techniques we can use to figure out this stuff, from swinging over a target one way and then from another to compare, bouncing the coil over a high tone to look for the drop and whatever else.
Maybe not 100% perfect but close enough and it doesn't take all that long...better than spending more time digging junk.
Don't think there are many detectors out there that can deal with this problem much better unless you get into imaging radar and even on that type of high tech I doubt that you could make out a rusty nail at 8" very well.
This is what the hobby is all about, learning techniques to deal with all the different target types out there both ferrous and non ferrous, great ones and trash.
You do have fun at it despite the little time it takes to gather in information to make digging decisions...using a few other brands you might find it could take way longer to do it with much less success.
I have hunted some sites so infested with iron that it almost unbelievable and have pulled out more great masked targets out of them than most others I know of because these things are so great in iron.
There are the normal indicators to give you clues and I have figured out other more obscure indicators and behavior patterns that work in dense iron too thanks to the abilities these things have.
Some newer whiz bang detectors and brands are supposed to be great at this type of hunting too nowadays but the Fishers have had this reputation for a long time before they were even invented.
I have been extremely happy with mine and the success I have had when wading into these problem iron infested sites that I used to avoid due to frustration using others, but there is one issue that seems inherent that most Fishers have that do drive me crazy.
It is rare but it does happen.
For some reason a deep pull tab at 10" will disguise itself as a solid, clean sounding repeatable high tone coin in the audio and numbers on the screen and I am not the only one that has seen this happen.
To dig down that deep and find a target sitting there at 10" or more thrills me that I have a tool that could even notice it there, to discover it was a tab and not a silver dime instead does not.
Still, you gotta take the good with the bad and using this brand I have seen way more good than bad so I always forgive mine when it makes me dig deep for no reason from time to time.
More often than not it is not wrong once you learn to understand what it is really telling you.
Greg (E.Tn)
Well-known member
If you're a coin hunter, I understand perfectly well the frustration trying to discriminate iron out.
But if you're a relic hunter, the subject gets murky real quick.
Think about all of the desirable iron relics you miss with too much discrimination: gun parts, gun tools, iron spurs, bayonets, artillery frags, artillery rounds, steel traps, saddle parts, and so on.....
Back when I used the old Fisher 1260 series of detector, I used to dig a lot of gun parts and neat iron tools like bullet worms and the like.
Not so much anymore......
I don't know many machines that will completely discriminate out ALL small iron, but still give a good signal on everything else. Also, there's always that "mystery" signal that sounds iffy, no matter which way you swing the coil, no matter, what the screen or confidence meter says, it's still iffy, and your curiosity always gets the better of you.
If it's doubtful, just dig it. Sure you will get fooled a lot, but at the same time, you might just dig a really neat iron relic that you would have passed over, otherwise.
But if you're a relic hunter, the subject gets murky real quick.
Think about all of the desirable iron relics you miss with too much discrimination: gun parts, gun tools, iron spurs, bayonets, artillery frags, artillery rounds, steel traps, saddle parts, and so on.....
Back when I used the old Fisher 1260 series of detector, I used to dig a lot of gun parts and neat iron tools like bullet worms and the like.
Not so much anymore......
I don't know many machines that will completely discriminate out ALL small iron, but still give a good signal on everything else. Also, there's always that "mystery" signal that sounds iffy, no matter which way you swing the coil, no matter, what the screen or confidence meter says, it's still iffy, and your curiosity always gets the better of you.
If it's doubtful, just dig it. Sure you will get fooled a lot, but at the same time, you might just dig a really neat iron relic that you would have passed over, otherwise.
MarkCZ
Well-known member
With other detectors that I've had where the audio and the VID are independent I found that with some larger iron what would happen is what would call (in my own words) a 180 response! for me what that means is the iron and is halo and its size will sometimes respond with a high tone and its this response that draws our attention to the meter for the VID. here is the deal, when its iron it would also have a negative response in the iron range and for me I ALWAYS had that target range disc out, meaning I would never hear it!! After I started noticing this I started to pay more attention to the meter on responses that didn't give an audio report on every swing, by that I mean I would sweep the coil over the suspected target in several direction and watch the meter and in doing this I found that a good bit of the time I would see a way low in the iron range VID with no audio, then when I got a high tone audio response in would be very close to the same positive number that I got for the negative VID nember. That detector gave negative numbers for ferrous and positive for non ferrous, That helped me to determine the unwanted iron targets, on the other hand if the response was a high tone but would some times breakup or give a much lower positive response (but nothing close to a 180) I found to be a good target getting kick around by a junk target, these proved often times to be the real keepers!
Mark
Mark