I do not remember seeing this covered on any post...

[James/Washington]

Do you hunt in trashy places with the Fisher F series detector? Well, I do and if you are like me, I have been discriminating out the tabs to keep the junk from driving my mind crazy. I have been doing this since 2009 when I purchased my F75. I do have the DST upgrade. Let me give you a tip that may suit your detector setup and able you to get more finds. If you discriminate out everything except nickels, (anything above 64 can not be discriminated) then you could be missing some coins. Why? Because the F series detectors, and most other detectors as well, will 'average' up or down on multiple targets in the ground. Say there is a dime (or penny) and an inch or two away is a nickel and you sweep over them, and have 'Tabs' discriminated out, you will NOT get a signal. Nothing! If you add in 'Tabs' then you WILL get a signal. The signal will be in the 'Tab' range somewhere around 46 to 49 because the detector has averaged the signal. This will happen in any process while in 'Disc'. There is not a problem in 'All Metal". You can perform a test of your own to verify this. I hunt in modern, trashy parks, so this is known and accepted by me. You guys that hunt in some older parks could easily pass up some shield or V nickels so I thought I would mention this in a post. Hope this is of some help.

 

[still looking 52]

The parks we hunt in are real trashy and like you said if you put your disc down below tabs you can't move without getting a hundred hits in just a few feet and hunting in all metal is just about impossible because of all the trash. Your 100% right about the average theory and the bad targets hiding the good coins but its still tough getting through all the trash. One other method to add to your comments is to watch your meter and see how much jump you get from your sweep from side to side , if there is more than 5 points difference its probably not a good target.

 

[REVIER]

I use an F70, I hunt some very trashy parks...always have.
Not so much a coin hunter although I do find them at some older sites, but what I do look for is jewelry is jewelry, especially gold, and I have been somewhat successful.
I can tell you that this up-down averaging effect is also true in hunting that elusive precious metal...and silver too.
I rarely disc out much higher than 15, most of the time I hover between 4 and 6.
In areas with a lot of small foil or can slaw I might go into the lower 20's, but since recently reading a post where someone found a gold chain at 18 I probably won't do that much anymore.
I NEVER use notch.

I hunt in trash several different ways, 2 of the best ways involve both disc and all metal.
Using disc I have found NasaTom's advice of disc 6, mono tone, I usually am in low negative thresh, DE speed for the fastest processing.
Sense usually from 60 on up, 85 is normal for me if it stays relatively quiet.
In really heavy trash I lower the sense to between 30 and 40.
These disc settings seem to give me the most stable info on good targets in heavy trash, even when using the big DD coil.
I look for some stable repeating numbers, even a flash of them, and check out targets from a couple different angles.
It works pretty well at plucking out good targets among trash.
I don't like discing out trash when I can, or notching out trash ever because there is too much I could miss that way.
I just get all signals and quickly examine each one and ignore the ones I can't get stable quickly.

What works very well for me, better really especially in heavy EMI, is full blast settings of 99 sense, 9 thresh, all metal, and on this particular target in the pic below I was in SL although nowadays I use DE more if major depth isn't my concern.

This gold target was nestled nicely between 2 pieces of rusty iron.
One was deeper an inch or two on the right, the kind that throws off some of those high tones, the other was an inch or two on the left shallow and smaller like an old nail.
Luckily I hit this thing from the right angle, from right to left across each different target...if I hit all three at the same time from 90degrees I have no idea what kind of signal I would have gotten.
As it was that big coil had to cover all 3 of these targets at some point, and those that swing Fishers must have a clue about what was going on with the jumping and the audio in this area that also had more EMI problems than most sites I have ever hunted before or since, but I kept seeing flashes of some stable numbers, 51-53 as I swung back and forth over the area.
That is always my cue to dig so I did and this 10k beauty popped up.
Out of the ground it dropped 10 numbers to a solid 41 with every pass so those iron objects definitely affected that signal and up- averaged it.
I can see the same effect happening in the field with coins and all kinds of other jewelry so I believe and stay on my toes at all times.

 

[mudpuppy]

I think masked and multidenom stacks, tight multidenom spills, slants, all that, a guy sort of has to learn on their own...like you mentioned, theres a few settings that work better than others, but a guy just really needs a lot of field time and really know their rig to recognize them..You are 100% right on one thing...EVERYBODY should take some modern clad out in the yard and build a few multidenom stacks and tight spills...right there on the surface...and see what a mess they sound like if you want any hope at all of ever finding a nice missed old coin spill in a trashy public and pounded park! Its an eye opener...I'm sure theres silver dollars out there with a few buff nickels right on top of it! Or a nice Shield nickel with an indian, and maybe a seated D in the mix...NOBODY would ever dig that!....Makes a guy shudder thinking about missed GOLD coins with a penny on top!

Trash hunting takes practice, its fun within reason, few hours tops is all I can handle concentrating like a guy has to...sensory overload like you said....good post James!...
Mud

 

[Coin Rescue Inc]

After the upgrade, I noticed that in older parks I do get more distraction from bouncy numbers. My favorite tone was 3H. Now with the bouncing numbers every target hit jumps into the 70-90 range providing the high tone. Before the high tone was an alert to pay attetion, something good here. Now it is like the "child calling wolf" so often the high tone advantage is gone.
Used the F75 in a seeded hunt running at sensitivity real low like 15 and the 5" coil. That worked well on 3H.
Now in clean empty lot 3 tone works perfect and it is dependable.
The manual says the tones are a separate process and more dependable especially on high conductors that are deep. But with 2 to 6 high tones on junk per sweep for example what is the advantage?
Anyone else notice this. Perhaps I have an issue that needs service.

 

[WV62]

Coin Rescue I am about the same, I have noticed a lot more high tones as well. What I have started doing is stay swinging on target and try to get it to repeat while watch the ID numbers and the confidence meter. As my brother SL52 said, watch for the ID numbers to repeat or stay within a few number count. Then if my confidence meter is anything above half I dig it.

I don't think there is anything wrong with upgraded 75's, just different.

Ron in WV

 

[amberjack]

i made a nail board and the detector hears the coin but the numbers are way off from the influence of the iron and i would suggest a pull tab or can slaw would do the same thing.

so yes low disc and start at the start and just dig sure there will me heaps of stuff that i don't want to find but am a firm believer that we do get rewarded for effort and well where i am at all the easy stuff is gone and if i want to detect close to home i have to dig junk or sell my gear and go fishing or something and so for me it really is a mindset of trash tolerance, i think Clive Chinnick talks about trash tolerance and i guess for me it's a change in my thinking and how i go about detecting, its just different is all

but think about it this way the more junk the more traffic so the odds are that there is good stuff in there, it's going to stay there too till someone takes on the challenge so it may as well be me right

AJ

 

[Coin Rescue Inc]

Coin Rescue I am about the same, I have noticed a lot more high tones as well. What I have started doing is stay swinging on target and try to get it to repeat while watch the ID numbers and the confidence meter. As my brother SL52 said, watch for the ID numbers to repeat or stay within a few number count. Then if my confidence meter is anything above half I dig it.

I don't think there is anything wrong with upgraded 75's, just different.

Ron in WV

Yes,
I started to notice that there may be a way to get a better feeling for coins. Not certain yet due to lack of testing.
Ever notice the top BARS where it says ---IRON -FOIL-NICKEL-TAB-DIME-QUART+
Those Bars get highlighted too with the ID Number.
I started to watch those segments last Saturday and if the segmented bar gets highlighted and stable in the Dime or Quarter or both in that area then I would pull out an iffy ID numbered coin. Kind of got me excited.
Each segment includes a group of numbers.
Like I said It was just an observation and needs more testing by me and then others to confirm if it is valid.
Let me know what you guys see on this if you try testing the theory...........
HH

 

[Furious T]

This sort of detecting is where our hobby becomes very personsal, and it's great that it can be so. Personal in the sense that we all have our own likes, dislikes, abilities and disabilities, and attitudes towards digging and removing junk. How we use our skills and knowledge to cope in difficult places tends to be governed by all the above, plus how we might be feeling on a particular day; so, it is personal. All tips and advice shared is great, and can allow us to think of things that we might otherwise not have throught about. So, thanks for the tips.

 

[Coin Rescue Inc]

Was out this morning and finds were a bit slow. I headed for and old park. When I got there I discovered there was a festival going on. The place was packed. I think I will head back there Sunday evening.
So I had to go to a substitute place then another. I was able to use the Mine Lab Explorer and then later the F75.
Rain was threatening so I kept close to the car.
I got a quarter signal near a sidewalk with the ML and marked the spot. Then switched to the F75 with the 11" coil and 3H, De, 40 sensitivity.
The F75 agreed it was a quarter I'd as 83 fail solid so I dug it up.
I continued and on the other side of the sidewalk. In 3 tone I picked up a a partial high/medium tone with high and medium numbers. Because of the high tone and bouncy ID and I thought I better dig it to at least learn what I was going on. The Target ID'd right against the edge of side walk. I dug a plug and swept the hole and the plug. Nothing in the plug but still an iffy signal. So out comes the pinpointer. I cleaned the loose dirt out of the hole by hand and tested the hole and the pile of dirt. Both made the pinpoint buzz. In the dirt pile I found an aluminum screw cap. Hmm. I stood up and and checked the hole with the F75. Now I am getting a better 83 signal out of the hole. So I take the hand held pinpointer and check the hole. Wedged next to the concrete about 7" down is a brown clad quarter, 1966.
So tone trumps ID numbers in this case.