F70 and notch

[foreign object]

Thinking about maybe getting a F70 but wondering about the notch system it uses.

What is the notch band width and can you set up more than one band width?
Also will the F70 notch disc. out Zinc and silver? Don't hit me it is just a question!!!!

Thanks
FO

 

[MarkCZ]

Okay, I'll start off, I don't have an F70, but I've had and used/use other models in the F series that are very similar.
I've not SEEN any model that would notch above the Zinc penny range, that leaves the upper Copper and silver range above notching, I will say that its most likely able to notch in or out the Zinc range. The notch systems are arranged around known problem trash areas and that's why the copper and silver range are left OUT of the notch function.

You should be able to download an F70 Manual for the width of each notch, each notch is preset and their width in not adjustable.
The other side of that, yes! you can notch in or out as many of the notch groups that you desire.

In this area I'm pretty sure that the notch system on the F70 is kindred (related to) the F75. So, the way its used is like this. Lets say you have your discrimination set really high and you want to still hunt nickels which means its disc out, using the notch you can notch nickels back in (set to except), along with any other one you want. This works in the other direction the same way, lets say your running low discrimination which would leave all the notches open to except, when you select any one or more in any order they will be notched out (set to reject).

The below is from the F75 manual NOT the F70 but other than some expanded features the two models are very closely related.

NOTCH allows you to select target ranges equal to 1/2 of each category for inclusion or
exclusion from detection. As you rotate the knob, the target indicator will appear above the
range currently selected. If you set the notch value anywhere within the range, the notch value
will not necessarily stop at this number, notch ranges are fixed as follows:
1. 1-7 iron 6. 31-35 nickel
2. 8-15 iron 7. 36-45 tab
3. 16-20 foil 8. 46-55 tab
4. 21-25 foil 9. 56-60 zinc
5. 26-30 nickel 10. 61-65 zinc

Mark

 

[foreign object]

Thanks for the info. mark. I did download the manual but only reference I saw to notch suggested it only notched one range. I may have missed it and will look again.
Thanks

 

[MarkCZ]

I just went ahead and got the manual myself, below is a copy and paste from the F70 manual.

To demonstrate how to set a notch, follow this instruction at first use.
RESET DETECTOR
1. Turn detector off.
2. Press-and-hold both the GROUNDGRAB and
MENU buttons.
3. Turn the detector on, while you are still pressing
the buttons.
4. Detector displays

 

[MarkCZ]

Thanks for the info. mark. I did download the manual but only reference I saw to notch suggested it only notched one range. I may have missed it and will look again.
Thanks

Boy, your right about the F70 it does leave one with some questions!
I went through the whole thing and I didn't see "Notch Width Ranges"
and like you noticed, they didn't really state multiple selection of the notches, but the other models in the F series does and I'm pretty sure the F70 does as well.

It looks like the F75 splits the tab range and the F70 combines it, but the total width of the Tab/tabs range is the same for both models and that's 36-55.

Mark

 

[dahut]

I don't use the notch
I leave it off and let the tones, TID and Confidence feature help me determine what might be beneath the coil.
You'd be amazed at how many good things I've found that have been ID'd as foil or tabs.
If you are finding a site littered with tabs so badly that you can't tolerate them, let the detector tell you that instead of overlooking them.
Too often, when a notched item is near a good item, well, the good one is masked.


Bottom line, if you want to use your instrument to NOT find things, well, why go?

PS I will use the notch accept feature when looking for a particular item, like lost keys or jewelry.

 

[WV62]

Same here hardly ever notch out anything but at times I have notched in nickels when running for fresh dropped coins.

Ron in WV

 

[mudpuppy]

Yeah..same here...never used it, not smart enough to figure it out..and to askaired of missing something good...even a working cigarette lighter is a 'good' target to me....so I defaulted to mastering the DP tones, the sens and thresh, and getting really dang quick on target retrieval.....maybe someday, I suppose it would come in handy in the right situation...still, this is a great subject with some very good answers MarkCZ! Maybe a 70 user will pop up and post experience about what Notch will do for us in the field?
Mud

 

[foreign object]

For the critics of notch I understand what you are saying but that really does not answer my question. If you have a f70 , know the answer or have any info. your reply will be welcome.

MarkCZ thanks for trying to help.

 

[dahut]

For the critics of notch I understand what you are saying but that really does not answer my question. If you have a f70 , know the answer or have any info. your reply will be welcome.

MarkCZ thanks for trying to help.

Fair enough:

>>> What is the notch band width?
I don't know the absolute electrical conductivity values each range represents. Every manufacturer has a slightly different arrangement.
However, you can expect the ranges established by Fisher for each named item will be sufficient for the MAJORITY of items within that band.
Remember, these are conductivity responses... We give them the names.

Here are the VID VALUES:
Iron - 0-15
Foil - 16-26
5

 

[REVIER]

Thinking about maybe getting a F70 but wondering about the notch system it uses.

What is the notch band width and can you set up more than one band width?
Also will the F70 notch disc. out Zinc and silver? Don't hit me it is just a question!!!!

Thanks
FO

IBdiggin's post states the notch ranges in this post..
http://www.findmall.com/read.php?37,1997987,1998208#msg-1998208

You can set several notches at one time.
You can't notch out silver or anything over 65.
You can't disc out each half of the notch sections like you can with the F75, the whole section has to go.
If you set your disc high, anything you notch below that will be notched in, not out.

 

[WV62]

Thinking about maybe getting a F70 but wondering about the notch system it uses.

What is the notch band width and can you set up more than one band width?
Also will the F70 notch disc. out Zinc and silver? Don't hit me it is just a question!!!!

Thanks
FO

Notch band width or segment = a count of 10
so if you set a foil notch it will take in numbers 16 - 25
Nickel notch =26 -35
Tab notch = 36-55
Zinc notch = 56-65

So the F70 will notch Zinc pinnies
The F70 will not notch silver coins

Don't hit me just the answer.

Ron in WV

 

[dahut]

Thinking about maybe getting a F70 but wondering about the notch system it uses.

What is the notch band width and can you set up more than one band width?
Also will the F70 notch disc. out Zinc and silver? Don't hit me it is just a question!!!!

Thanks
FO

Notch band width or segment = a count of 10
so if you set a foil notch it will take in numbers 16 - 25
Nickel notch =26 -35
Tab notch = 36-55
Zinc notch = 56-65

So the F70 will notch Zinc pinnies
The F70 will not notch silver coins

Don't hit me just the answer.

Ron in WV

Note the tab notch spans TWENTY points on the scale - double that of the others.


PS Imagine all the pesky wedding bands, high school rings, men's gold rings and so on which can be eliminated with that!**

** I remember my partner calling me over to check a signal.
"Pull tab," I said. "Dead in the middle of the range, too."
"Would you dig it?" he asked.
"Not based on the indications."
"Hmmm, I'm not sure..." And he then dug a gorgeous amethyst/14k from the spot.

 

[foreign object]

You guys have restored my faith in this forum.
Thanks for the info. just what I was looking for.

FO

 

[dahut]

n/t

 

[dahut]

You guys have restored my faith in this forum.
Thanks for the info. just what I was looking for.

FO

Well heck, that didn't go as planned.

 

[WV62]

You could be correct, I don't own a F70 but I do have the F75Ltd and the face plate in the F70 manual is a match number wise to the F75. Now I don't see how you can have a count of 20 for a notch segment and still end up at 65 which according the manual is max the same as my F75. So lets do 20 from iron up using 20 as a segment.
Iron=0-20
Foil = 21-40
Nickel = 41-60
Tabs=61- 80
Zinks= 81-100

Sorry I have to disagree with the 20 count for a notch segment.

Ron in WV

Thinking about maybe getting a F70 but wondering about the notch system it uses.

What is the notch band width and can you set up more than one band width?
Also will the F70 notch disc. out Zinc and silver? Don't hit me it is just a question!!!!

Thanks
FO

Notch band width or segment = a count of 10
so if you set a foil notch it will take in numbers 16 - 25
Nickel notch =26 -35
Tab notch = 36-55
Zinc notch = 56-65

So the F70 will notch Zinc pinnies
The F70 will not notch silver coins

Don't hit me just the answer.

Ron in WV

Note the tab notch spans TWENTY points on the scale - double that of the others.
Imagine all the pesky wedding bands, high school rings, men's gold rings and so on which can be eliminated with that!

 

[dahut]

You could be correct, I don't own a F70 but I do have the F75Ltd and the face plate in the F70 manual is a match number wise to the F75. Now I don't see how you can have a count of 20 for a notch segment and still end up at 65 which according the manual is max the same as my F75. So lets do 20 from iron up using 20 as a segment.
Iron=0-20
Foil = 21-40
Nickel = 41-60
Tabs=61- 80
Zinks= 81-100

Sorry I have to disagree with the 20 count for a notch segment.

Ron in WV

Thinking about maybe getting a F70 but wondering about the notch system it uses.

What is the notch band width and can you set up more than one band width?
Also will the F70 notch disc. out Zinc and silver? Don't hit me it is just a question!!!!

Thanks
FO

Notch band width or segment = a count of 10
so if you set a foil notch it will take in numbers 16 - 25
Nickel notch =26 -35
Tab notch = 36-55
Zinc notch = 56-65

So the F70 will notch Zinc pinnies
The F70 will not notch silver coins

Don't hit me just the answer.

Ron in WV

Note the tab notch spans TWENTY points on the scale - double that of the others.
Imagine all the pesky wedding bands, high school rings, men's gold rings and so on which can be eliminated with that!

Checked it twice on my F70.
Remember, the notch function stops at 65.

 

[WV62]

Okay I will give and say we were all wrong and we were all some right.

Iron notch = 1-15 for a count of 15
Foil notch = 16-25 for a count of 10
Nickel notch = 26-35 for a count of 10
Tab notch = 36-55 for a count of 20
Zinc pennies = 56-65 for a count of 10

Sorry at first I didn't even look at iron and then I wasn't pay attention to the math on the tabs notch.

Ron in WV

 

[MarkCZ]

Okay, by looking at the F70 manual and The F75 the Target ID range of both units are the same = 0-99.
The Discrimination level or range of both are the same = 65

Neither the notch or Discrimination will go above 65 on either unit.

The Fisher company uses the same object target ID range for both units.

Here is that information from the F70 manual, (I don't know why Fisher left out the Iron ID range?)

OBJECT TARGET I.D.
foil from gum wrapper 16-25
U.S. nickel (5