Anyone have a list of the actual F70 notch ranges?

[REVIER]

I read this post from sookie and it was very helpful in understanding the notch system.
Using disc and notch together you can fine tune your combinations.
http://www.findmall.com/read.php?37,1435316

The question I have is does anyone know the factory span of numbers on the F70 in each section?

I know from scouring posts that 15 will get rid of most iron, notching numbers in the 40's or so will get rid of tabs as it says in the manual, and so on, but I can't easily compile a range list from the many posts I have found so far.
I don't use a lot of disc when I hunt so it is not a big deal, but I do want to learn all I can to use that knowledge if needed for certain situations if they arise around specific trash filled sites and having an idea of the notch range numbers could be helpful to an anal guy like me.
It would have been nice if they put a complete range list like this in the manual but they neglected to do that.

Any help on the actual notch numbers for all sections like iron, foil, nickel, tabs and zinc would be appreciated.

 

[mudpuppy]

Good Question! I dont know the answer, but thinking about this now and knowing how you like to hunt, I doubt you will ever find a need for it...unless a guy is looking for a specific target of a known TID signal, then I would suppose it could come in handy...perhaps a fellow can notch out the high signals and just hunt midtone gold? What would be the idea behind that though for a fast retriever such as yourself? I hope somebody comes along and tells us what advantage notch does for them in the real world in a certain location?
Mud

 

[REVIER]

Good Question! I dont know the answer, but thinking about this now and knowing how you like to hunt, I doubt you will ever find a need for it...unless a guy is looking for a specific target of a known TID signal, then I would suppose it could come in handy...perhaps a fellow can notch out the high signals and just hunt midtone gold? What would be the idea behind that though for a fast retriever such as yourself? I hope somebody comes along and tells us what advantage notch does for them in the real world in a certain location?
Mud

You're right, probably won't use notch much if at all, but I can see situations arise that knowing this could be an asset.
Let's say I am in a really trashy site looking for jewelry.
I might be coming across a huge amount of foil at a specic lower range of numbers and on this day I would want to knock those out, but I might not want to knock out everything in the foil range and keep a few higher numbers in.
I can adjust the disc as sookie says to affect this range, or just get rid of everything below the disc setting I set would be another way, but knowing the actual foil range might just be helpful in fine tuning the disc settings to get rid of the foil I want but keep some of the higher foil, in.
Or, maybe I want to keep the disc low but still knock out foil, I want to know exactly what the numbers are in the the entire foil range that will be taken away which is what will happen because...well, just because I do.
As I said, I can be anal.

As they used to say on those public info tv ads...

"The more you know".....

 

[IBdiggin]

Morning fellas, I figured I would find someone here on this brisk -2 morning. I am no pro with the 70 I will admit. My area is a haven for ever changing conditions as I have only hunted so far In this Wisconsin river basin. The well drillers here tell me we have 30' of sand before bedrock or clay and the sediment deposits of the W. Dells area only 30 miles away. Gb can run anywhere from mid 60's to low 90's depending how much black dirt gets hauled into parks and yards also the purity of the black dirt used. It seems the only constant is change and change is constant.
Revier, I will use an example I read from one of your writings a while back where you described the round foil seals like the ones on the tops of small milks bottles which come in at a dead solid 20 to 22 on the 70 with the elliptical 10" by the way just like the F2. If there is such a thing I would assume they would be a dead ringer for small ladies gold. I have yet to find my first gold so still waiting to make the comparison. If I am not at a relic site I notch out iron totally and discriminate about 17 or 18. The seals will still come in very nicely in delta pitch and probably the other tone settings as well. While looking for that sweet spot for the sensitivity settings trying to minimize falsing, I learned a little trick while teaching my grandson to use the Ace 250. Even though the iron is notched out it still will silently display the iron icon above the notch if iron is present when false signals are suspected. Here is where the confidence meter will also help to form an opinion. Some call the association sort of a wrap around from iron into the high tones. I had some experience in 10 and 11 meter radio so it is easy for me to interpret this wrap around theory as frequency bleed over since I look at sensitivity in detectors the same as power or wattage in radio transmitters. The less sensitivity you run, the less falsing from low iron. I am starting to believe, (just an opinion so far) that the clicking sounds so many people hear but cannot explain seem to be higher in numbers when getting closest to the non falsing sweet spot sensitivity setting and I associate them with rejecting the high tone from the rust and being a good thing. I have tinnitus so I need headphone to hear these clicks. I really get the feeling every time out with the F70 it is trying to teach me something new and after spending one summer with it I find I am only scratching the surface of what this fine detector is capable of--------HH everyone----Larry

 

[IBdiggin]

You know Revier, after looking back and reading my previous post a few times I come to the conclusion that I didn't do a very good job of answering your question. I find there are those of us that don't like to notch to many things out completely. On my part it is that I am not looking for anything specific but anything of value is more than welcome and I need the knowledge that goes along with finding it. I would be afraid to start notching too much unless ,like Mud says, you are looking for something specific like the mate to an earring or some other pre sampled item. It seems when ever I pinpoint a target to make sure I am absolutely on center, the VDI actually changes somewhat or you can bust that folded over beaver tail trying to trick you into thinking it is a nickel. Even corroded zincolns will sometimes flicker up in to the 70's if you radiate them enough to the point they will even change audio tones. I guess the only thing I am comfortable notching with the amount of experience that I have is low Iron. Sorry if I am confusing the issue-HH

 

[mudpuppy]

IB, This is great dialog for the winter!...I cant remember reading anyone who uses the notch function regularly...I can visualize that can slaw/foil situation where it might come in handy..or in an area where somebody tossed out a handful of splitshots? My problem is I'm a simple person that has found a setting that produces for me the way I hunt in my area and have not experimented at all with any of the other features, except for adjusting sens...I hope REVIER will provide us with the effort it takes to truly learn what this machine is capable of...and he will share, he always does...you know the more we can learn here really helps with in field work...I think if somebody reads these subjects in the Future, they would see that the F70 can really rock out an area in a hurry and seems to match certain personality traits of fast hunters..though I've not tried one, I think maybe a Deus would be similar to this machine? As far as speed, ergonomics and target separation? Anyway, theres so many diff settings on this thing it would take a guy a lifetime to learn what they all do... When I'm out hunting, I dont want to take the time to experiment, my bad, yes, but like the guy who threw the stick of dynamite into the game wardens lap said, "you gonna talk or are you gonna fish?"

I sure hope somebody chimes in and tells us that Notch does not affect depth like disc does? or what in the world somebody would use it for? Surely Dave J put notch in the 70 for a good reason... If the 70 was designed as a water hunter, maybe notching out all high tone clad would be used...but since a silver ring hides in there, what would be the sense of that? On the low iron end, I just dont see the use of notch either when disc can be used? Help! Somebody please 'splain it wouldja? I'm gonna pound the heck out of a sledding hill at Oh dark tomorrow am...
Mud

 

[REVIER]

Hey, I thank both of you and you must know you both are important go-to guys for information about using this thing as I learn it...along with all the other knowledgeable owners out there that take their time to share.
All that you guys tell me I will take into account and learn from, believe me nothing I ever come across is ever wasted and always filed away to be used at sometime in the future.
A little info here, a little innocuous fact or suggestion there, a little experimenting in the field and before you know it you get one of those AHA, epiphany, moments when it all comes together and you have another small piece of the language puzzle locked in to your memory forever and you become a better hunter...if only just by a slight margin.
I sure don't have much time in with the great F70 yet, but I can tell you I have great patience when it comes to this hobby, I love to experiment and have great skills at noticing things in the field about how my machines work and targets behave and you know me, if I can figure out something that works over and over again and it can help out the next guy me and my loud mouth fingers will be sure to post those insights somewhere.

As we all said, knowing the actual notch ranges is not all that important considering the way I usually hunt, it is just something else to file away for future use if needed.
I guess I could call Fisher and ask, or track down Dave Johnson since he designed the thing and probably knows and remembers the parameters he set doing the programming, but I just thought that maybe someone around here might already have a list handy.

Now if both of you could be so kind please hop on over to my other thread and give me some suggestions on using the 10" elliptical coil if you have any...and thanks!

http://www.findmall.com/read.php?37,1998111

 

[IBdiggin]

OOOOOOOOOOOOOOOOH! DUH!!!!!!!!!...Revier, My senior moment just expired and a light came on and I just figured out what you were asking. I remember while adding discrimination at a park one day the unit actually auto-notched as I went higher up the scale. Is that what you wanted to know? If it is just turn the F70 on, set in discrimination mode and push the + button and watch discrimination values go up. 0 to 15 is iron. 16 to 25 is foil. 25 to 35 is a nickel, 36 to 55 is a tab, 56 to 65 is zinc and that's as high as it goes .I guess that is why they have notching and discrimination both, so you can eliminate parts of lets say low foil without notching it out completely. Hope this is what you are looking for-----------.-Larry

 

[REVIER]

Ok...a total, DuH, moment.
Someone who was not so lazy, had a little more common sense and not so many meds in his system could have probably figured this out for himself.
Thanks man!