Well Digger, I'm hoping you, or someone over here, will pick up on this post.

After reading your post, over under the other topic, I've been studying my manual, and trying to understand some of the other settings on the F75. First I did the factory reset, that you were telling Charlie Tuna to do. No problem, and I have been doing that pretty regularly, anyway.

Again, I only had the F75 out 3 times, before I realized I had a coil problem, and had to send it back to Fisher. All I got right now is my little 5" DD coil.

So, I went over to check out the audio pitch setting (default 0), and I tried changing settings, all the way from -9 to +9, and all in between, and I hear absolutely no difference (?) in pitch. It's supposed to carry over to the Discrim side, according to my manual, but not so, unless I'm doing something wrong. I was changing the setting, then switching back over to the Discrim side, because I was familiar with how the tones sound there. It didn't seem to change them at all (?)

I also had some test coins/objects laid out >> quarter, dime, copper penny, clad penny, nickel, pull tab, and a small iron wrench. Definitely three distinct tones there. Low (iron wrench), Mid (clad penny, nickel, pull tab), High (copper penny, dime, quarter). So while I was switched over from the Discrim side, over to the All Metal side, I thought I would check my items, to see how they sounded. They sounded entirely different, almost like pin-pointing, when in Discrim. But what gets me, all the coins/objects had basically the very same sound, just a very slight difference in mid to high tone. Is that correct ?

I didn't mess with the Threshold setting, because I still don't understand that. I seem to have some kind of mental block on that, and just don't understand what it is, what it's for, or why I would want it. I'm sure it will come to me one day, but not tonight

Also, I see there is a second Sensitivity setting, over on the All Metal side. Again, that caught me by surprise. Why two Sensitivity's ?

Oh well, I think I'm reaching burnout for today, but I'm trying...🤔

I'll probably have a ton more questions, if I ever get my regular coil back. 😧

Ok, I will answer as best I can considering I run with the F70 and not your F75 which has several whistles and a lot more bells.

First, I love that sniper coil.
It has fantastic depth, picks through trashy and heavy iron sites like a dream and easy to learn this thing on because you can isolate all signals easier.

Next, that audio pitch thing I don't have but it is a cool feature for sure.
I guess I will have to download a copy of your manual and see exactly how this works to give you any advice in this area but you can also post a question about this pitch thing in the How to use your detector forum and I am sure someone that knows about this stuff can answer intelligently.
Off the top of my head I would go watch this vid with Keith Southern singing the praises of yours...
https://m.youtube.com/watch?v=7omVeK5Or_Q

Go to minute 6 where he messes with the audio pitch.
He changes it in all metal and then switches over to disc and it has changed.
The key here is he is in 2F tones.
It could be the audio pitch only changes when using the lower tone choices like between the 6 lower choices you have 1-2L...all choices that use pretty much a single tone for the most part.
If you are changing that pitch and expect to see hear the tones change in multi tones, 3-4H which I assume you are trying to do from the clues I can gather, this might not work at all even though the manual,(which I just downloaded), says you can adjust pitch in disc but no mention about if it works on all the tone choices or not.
I suspect not.
Multi tones are already split into 3 or 4 distinct tones and this might not affect them or might even skew them into weird areas.
If you have tried one of those lower tone choices, I use 1 monotone a lot, and 1F and 2F, there actually isn't going to be a whole lot of difference in those basic overall tones except for some modulation like you would get in 2F that can tell you the difference between shallow and deeper targets and that iron growl...not counting the change in pitch.

Now that second sensitivity setting in all metal...
On my F70 it has a fantastically great feature where it is possible to use 2 different programs to hunt with...program 1 and program 2.
Each program is distinct and unique in its own right and you can use completely different settings on either and switch between them...like having two different detectors in one in your hands.
I love this, I set up one program in disc with certain settings, thresh, sense, tones, notch, and the other I usually have in all metal with different settings in thresh and sense.
I hunt using one and use the other to check targets if needed.

Evidently you have something similar except you don't have a program 1 and a program 2 but a disc and an all metal side, (2 all metal choices, actually), which is pretty much the same thing.
On one all metal choice, static I believe, you can't adjust the thresh but you can adjust the sense differently than the disc side and the other all metal motion choice you can adjust the sense and the thresh too...and maybe some other settings also.
That is why there are 2 sense settings, one on all metal and one on disc...again this gives you the ability of using two different machines in one with completely different settings to switch between and check targets differently.
Way cool I think...very handy too, trust me on this and great if you learn to use it to your advantage.
It can be used to make digging decisions quick, efficiently and confidently once you understand target behavior using different settings and comparing them to each other.
More data at your fingertips to make those decisions on the fly.

Again I don't have yours but many do or have had some version of yours for a long time and can give you more information about the ins and outs than I can.
This forum has a lot of very knowledgeable Fisher owners, I am known as REVIER on this forum.
I learned a ton over there and we share info a lot even if we sometimes use different units the F75, F70, F19 and F5.
Lots of these different settings and behavior and techniques work across all these platforms, some don't but it is nice to have the information to use at hand to see if any of it works as needed.

http://www.findmall.com/list.php?37

Come over and join, lots of great help over there.
Mudpuppy got kicked off this forum awhile ago so now with all the common trash and troubling riff-raff gone it is a relaxing pleasure.

Ok, I saw the audio pitch change in the video, and I got it to change on my unit, but not in the #tones that I use. I'm accustomed to hearing 3 distinctly different tones, as I described earlier. I just can't understand why I would want everything to sound the same. Even in the #tone setting, that the video showed for pitch adjustment, everything sounds basically the same, once it's set. That's really strange to me. I'm having a hard time now, understanding why I would even want to go over to the All Metal side at all. Everything sounds the same to me. The video guy surely wasn't very clear on all that, plus I couldn't see much of anything, when he was making changes. I wish he would clear that up a bit.

Also, in the video, the guy praises the DST, which I thought was for eliminating noise & chatter, then he says that he doesn't use it (?). He talks about how silent the machine is, yet it was chattering the entire video (?). Again, maybe I'm missing something there, I'm sure I must be.

I don't understand how you find anything, if everything sounds the same, and if the machine is so noisy and chattering. Also, if you have DST, why in the world wouldn't you use it. Again, I'm probably missing something. With my test targets, I like to know the difference in the iron wrench vs the quarter vs the nickel. Why wouldn't you want to hear that ?

Oh and please, I'm just trying understand.....I'm not meaning to be critical. I really do appreciate the help....🙂🙃🙂

No problem.
One by one let's tackle these things.
You prefer to use multi tones, that way there is a different tone for different segments which is fine.
Many do but not everybody, many of us really enjoy using the other tone choices and all metal, choices where you say it all sounds the same.
There are many reasons for using these and I will get into that but for now if you like multi tones use 3, 3H, 4 or 4H.
That audio pitch thing might not work in those choices since you already have distinct tones including a programmed high tone so if it doesn't don't worry about it.
I went from using an F2 for about 1000 hours that had 4 tones to this one and at first for a long time all I used was 4H tones because it was familiar and comfortable, eventually I got into others but back then that was all I used and I found a ton.
Lots of coins and even a small piece of silver jewelry on my first hunt, a big gold ring on my third hunt that came in as a nickel but I really noticed it because in 3H and 4H all nickel targets are changed to high tones which I pick up best of all.
The person that invented this nickel changed to high tone thing was a genius as far as I am concerned.
Many use one of the multi tone choices all the time and nothing else so if that is what you want to do, do it.
We are all different.
When you use multi tones the sounds are important, using them I can hunt my parks and move through them efficiently without looking atthe screen and just listen, but when I hear something good I do stop and keep swinging over the target listening but then I also look at the screen.
There is a lot of info in those tones but there also is in the screen info, those VID numbers and how they behave plus that confidence meter which I myself never use.
Those numbers I sure do, however.

As far as those other tone choices and all metal, the ones that all sound the same to you, they actually have some great advantages if you learn to use them and no, they are not actually all the same using them...each one has its own little distinctions but it takes time to understand them.
Using these the sounds you hear is still important but the screen info gets real important.
I use all metal much of the time nowadays, I use 1 monotone more often than not in disc both for several reasons and don't use 4H much at all any more but that is me...you use what makes you happy especially while you are new at this and learning.


In the vid Keith was talking about DST being quiet but his still chattered.
He had the sense cranked up all the way to 99...that is why, if he turned it down a bit it would have stopped, and I am not sure he was using DST at the time, anyway.
Even with DST off some believe it is still engaged a little and in that vid at 99 sense with DST off that thing was still quieter than you might believe possible if you compared it to the earlier ones without any shielding at this high gain level.
Some don't turn it on unless they really need it and just leave it off most of the time.
Why, some believe using it has a lag time in the response, some think it loses a little bit of depth.
True or not people have all different opinions and noise levels they can handle.
You would not believe how noisy some of the ones I use can be, many can't believe I do it this way but they don't argue with the large amount of bucket list treasure I can find when I use them.

You keep saying you don't understand this and don't understand that when it comes to the many features of this thing.
Why use all metal at all, why use other tone choices besides multi tones, why not use DST all the time?
Why are all these options even on there?
As I said the reasons are because there are so many different hunters who are completely different people and they all want to use these different ways for their enjoyment and to find great things in their different sites.
Just take it for granted that there are many out there with way more time using these things than you have...hundreds and hundreds of hours some of us and we have experience and knowledge that you just don't at this time but one day you will.
They didn't put all these features and options on these things for show, they did it because each different one and different combinations can hold advantages for those that know how to use them.
You don't at this point so just quit questioning and worrying about it.
You are just beginning so take baby steps, learn to use just multi tones and a few other settings for now, you can still find amazing things using just a small part of what this thing is capable of doing and have great fun doing it.
As you learn and grow you might change and take more advantage of these other options but nobody says you have to use them all now...or ever.

If you know how to drive and decide to get a faster car to increase your pleasure and get a Corvette...is the first thing you do when you get in it is put it into competition mode and slam your foot on the gas and drive everywhere at top speed all the time?
No.
You take it slow and learn how to control it before you get into anything close to that.
Driving a car like that to the store at 40 mph could be just as fun and satisfying as running at 130...a lot more logical and safer too.

Use your multi tones, listen to them and learn the little inflections and minute differences as you hear them over targets because there are some that you can't hear yet.
Learn to watch the screen at the same time, there is behavior happening on that screen that can give you great insight about what you are swinging over that you cannot pick out or notice yet.
Not in just those numbers but how they act.
This is called learning the language and this thing has a full and rich one, one that I don't think you even have a clue about how much is actually there.
All will come in time, learn a little bit more each time you go out...baby steps is the way to do it.
You will laugh at what you are doing now, how much you know and the way you think about all this sometime up the road as you grow.
We all do...it is the natural order of things in this hobby.

Just think about it as if you have a superior, powerful racehorse in your hands but you don't have the skills to take advantage of all that yet.
Just trotting around in a field slowly as you learn to ride such a beast can be joyful too...one day you will know way more then it will be off to the races.

Well, that all makes a lot of good sense ! Throttle back and enjoy....

I think I'll go out for a "trot" around the park for a while


A couple of questions / comments, that I do have concerning the video, etc. You mentioned, and I likewise noticed, that he kept turning the Sensitivity all the way up to 99, and no, he didn't have DST turned on (in fact he said he kept it off), and even though the detector was raising a racket, he kept talking about how quiet it was. "Old school" quiet, was the term he used. I'm beginning to wonder if he could even hear all that racket, or is he so accustomed to it, that it doesn't even phase him ?

But back to my questions - why "99" ? Everything I read says that when the noise starts, you should decrease the Sensitivity, just until the machine gets quiet.

Also (sorry, but as I type, questions keep coming to mind)
Does the Threshold setting carry over to the Discrim side, and if so, should I just leave it at the 0 default level?

Here is how I am currently setting up:

Each time I begin (or for sure at the start of a new day)
First, I power on, and perform a reset as I do.
Second, I do an automatic GB

Then I make the following settings on the "Discrim" side
(pretty much default)

Sensitivity 70
Disc Level 0
Notch 1
# of Tones 3
Process # dE (or) PF

Should I be doing anything with the settings over on the All Metal side, such as Threshold, or is this good for now?

Good intelligent questions...keep em coming.
As they used to say in all those old public service ads on tv...



Accustomed to all that racket....yea, for sure.
This was practically silent compared to some of the settings that I use and some of the stuff I hear on mine...keep in mind I have no DST and I don't really care.
Over time i have gotten used to some really noisy settings, a veritable wall of noise and jumping on the screen.
No matter how much racket and noise you have on these things the remarkable thing is they will stop and tell you they are swinging over something good if just for an instant.
You just have to learn to recognize the indicators when this happens.
This was a learned process I got comfortable with over time and many hunts.
I also hunt quietly but my best finds have usually come on my noisier settings for several reasons.
Bad dirt, high EMI...whatever.
Always looking for the quietest settings to be successful but I also know how to do it real noisy, I have great confidence in those noisier methods so I use them too.
It's all about experience and at this point both Keith, and I, have much more than you....Grasshopper.

99 on the sense...most of the time you get deeper that way in his Tennessee soil and mine.
It could backfire on you, and we can probably turn it down some and still hit very deep but it is a mental thing sometimes.
I found something great with these settings before so I will keep using them kind if thing.
Do your thing, not ours, for now.
You need to practice a lot and keep moving those settings ever higher slowly over time to get used to hunting this way.

Want to know a secret?
A very common and much loved way for me to hunt, in both good and bad dirt, heavy trash, crazy iron or relatively garbage free are these settings.
Sense at 99
Thresh at 9
All metal..and remember I don't have DST.
Sometimes I use something we have called SL speed which is boost and can really raise the noise level.
When I started to use these settings to hunt with it was a complete accident, these were my check settings only and I was hunting in a park near an area with the most and craziest EMI problems I have ever been in before or since.
The jumping and noise here was crazy on all of my regularly used normal disc settings.
I was using the other program with lower sense, and thresh settings trying to combat that EMI when I switched into the all metal side to check a deeper target...and I forgot to switch back to disc again after I recovered it and continued hunting.
I immediately found another good target, then another, then I finally realized I was in all metal and not disc.
I found that even with all those problems the all metal with the maxed out settings seemed to handle it all a bit better than much lower settings using disc..a little quieter too if you can believe that.
As I said the thing would just stop acting crazy when I was over a good target and tell me with better indicators than when I was in disc.
I was shocked...but right then I started using those settings more and more to hunt with at all my sites.
A little at a time at first, 10 minutes here, 10 minutes there, the noise was driving me crazy but after time and doing this on many hunts i got more and more used to it and left it on all metal for longer and longer times.
Eventually I got real comfortable with it and now it is a natural and comfortable way for me to hunt...if I turn down the volume on my headphones that is.
As I said most of this stuff is all learned and not innate...with time and practice it all usually comes together.


Do you have the disc level at 0 as you listed, or the thresh...or both?
If you hunt at 0 disc that can be super noisy and confusing.
You will pick up mostly everything in the soil and EMI can come into play, DST or not.
A simple push up to disc on 1 is way less quieter and jumpy.
I use both and lately I am trying to get good at 0 but it can be crazy.
So far I have not missed anything at 1 disc I could not see at 0 but I keep experimenting.
I switched to using 0 disc several weeks ago, DP tones recently too now it is all about practicing.
Getting better with it and it is getting easier on every hunt but I am far from perfect at this point.

0 thresh, that is fine if you like that but on mine I rarely go much higher than -2...especially in multi tones because it makes the tones sound weird to me.
Annoying, actually.
In the lower tone selections it is fine and on my next few hunts I am going to try pushing the thresh up to about 4-5 or so and back down on the sense which I usually have set at 85 on up.

Higher thresh will find more targets, smaller targets deeper, but for coins and rings and things at most common depths -3 on the thresh or so can usually find them...Higher for sure.

You have complete control over the thresh in disc and in one of your all metal settings...The other is factory set and you can't mess with it.
EDIT*****this is incorrect...on F75's you set the thresh in all metal and it stays the same when switching back to disc.

These do not transfer over to each other, you have to set them on each side or just leave them at factory start up levels if you want.
I believe the ground balance you do is the only thing that is shared between the disc and all metal sides...everything else is completely separate.

bruinvikes just used some advice I gave him on his F70 with a concentric coil, set his sense on 60 but pushed the thresh to 4, 3 tones I think, disc I believe about 23 and found a wheat cent at about 8" deep...one of the deepest targets he has found so far.
He hunts in really nice and mild northern Ohio dirt.

High sense low thresh, low sense high thresh....all kinds of combinations can work.
Some don't mind noise some can't stand any.
Even completely different ones might have the same success...you just have to try different ones and see what works best in your soil and what you enjoy the most using and listening to.
There is no law that says you have to use just one combination of settings at any site at any time.
Since there isn't I figure I will continue to try new things to be successful, if I can find more than one way so much the better...more arrows in the quiver to use at any given site.
Who knows...one might work a bit better than another so again...The more I know...

I am not sure what that PF setting entails.
It is for uneven ground but I don't know about the speed, filters or anything else that happens when you use it.
I do know DE works great under most conditions in my sites which are usually parks...uneven ground or not.

Okay, I don't know where to start. I got the part about "Grasshopper". No arguments here, for sure !

Now, as usual and once again, I almost followed you up to the part about "All Metal & Threshold". It's just not registering I guess I don't know what to ask...
-----------------------------------
Ok, I got this part (secret) - All Metal > Sense at 99 > Thresh at 9, and I will set-up my All Metal "Motion" side like that, and give it a try ! Just not sure what I will be listening for ?
-----------------------------------
I don't understand this at all, but yes my Disc Level is set at 0 (default=0), and I haven't changed my Threshold (default=0), so it's still at 0..

Do you have the disc level at 0 as you listed, or the thresh...or both?
If you hunt at 0 disc that can be super noisy and confusing.
You will pick up mostly everything in the soil and EMI can come into play, DST or not.
A simple push up to disc on 1 is way less quieter and jumpy.

Disc Level on mine has a default = 0. You can discriminate from 1 up to 65. Changing the Disc Level from 0 to 1 will have little to no effect. Just knocks out iron tones that might register a 1, so not sure what you are telling me to consider, here.

Also, I don't know what you mean by - A simple push up to disc on 1 is way less quieter and jumpy. What is "disc on 1" ?
-----------------------------------------
Now, you really lost me on this next one. I think my problem with comprehending Threshold, is that I have now idea how the term "Threshold", relates to anything concerning a metal detector setting. Yes, I know what the word threshold means, but I can not relate it to a metal detector.

0 thresh, that is fine if you like that but on mine I rarely go much higher than -2...especially in multi tones because it makes the tones sound weird to me.
Annoying, actually.
In the lower tone selections it is fine and on my next few hunts I am going to try pushing the thresh up to about 4-5 or so and back down on the sense which I usually have set at 85 on up.

Higher thresh will find more targets, smaller targets deeper, but for coins and rings and things at most common depths -3 on the thresh or so can usually find them...Higher for sure.
------------------------------------------
Now, this is likewise confusing.

You have complete control over the thresh in disc and in one of your all metal settings...The other is factory set and you can't mess with it.
These do not transfer over to each other, you have to set them on each side or just leave them at factory start up levels if you want.

First, when you say disc, are you referring to the Discrim mode on the left side ? If so, there is no Threshold setting on that side, so I can't set it on both sides (?), only on All Metal side (Motion).
-----------------------------------------
Lost again here:

I believe the ground balance you do is the only thing that is shared between the disc and all metal sides...everything else is completely separate.

I thought the audio worked on some of the Discrim tones (just not the multi-tones)
-----------------------------------------------
I understand doing your own thing here

There is no law that says you have to use just one combination of settings at any site at any time.
---------------------------------------------------
Again, I just got a mental block on this Threshold thing.

Also, the F75 is laid out as follows with

Left Side:
DISCRIM......defaults & (my settings)
Sensitivity.............80 (75)
Disc Level...............0 (0)
Notch.....................1 (1)
# of Tones.............2F (3)
Process #..............dE (dE or PF)

Right Side:
ALL METAL
STAT / MOTION
Threshold.................0
Audio Pitch...............0
Sensitivity...............80
Manual GB..............90

Ok...you have that DST which really quiets everything down.
Even with it off I mentioned some believe there is still some extra noise cancelling shielding going on.
If you got a hold of one of the older ones without this DST stuff well...things would be a whole lot different....a whole new world of noise and chatter at high settings in some sites.
Many did, used some of your settings on the older ones and sold them fast...they never could get a handle on the noise and jumping.

That all metal, thresh and sense maxed out thing, I am not saying you should do that.
It might be what I would consider fairly quiet compared to mine but it will still probably be more than you can handle.
The method I use with these settings is hard to explain but it entails watching the screen close and listening hard and trying to pick out the more solid and somewhat repeating signals I get but they come fast...real fast in my trash and iron infested sites.
A friend I hunt with that knows the kind of sites I hunt in can't believe I do it this way or can pick out anything good out of all this huge amount of noise I hear and the numbers jumping all over as fast as they do sometimes.
But I can...I learned to do this over a long time.
He says it is like I use my brain as the discriminator, not the machine.
Maybe...I am not using it for anything else really important right now so what the heck.
On many forums I am known as the crazy guy because of some of the settings I use and the amount of noise I learned to handle...but as I keep saying it took time.
Many have tried to do it the way I do because they have seen what I have found in some insanely infested sites and for many it worked for them also.
I assume some tried them, didn't like them at all and never used them again.

If you want to use your all metal side as a check system or even to hunt with start at factory levels and maybe push it a bit higher if you can.
Move the coil slow and listen for some more solid signals compared to the little less solid false ones...look for repeatable numbers on the screen as you move that coil over the area, on the more solid ones do short swings over one area several times with the center of the coil over target center to get the most solid signal and most stable numbers.
Got that?
Or, just continue to use your normal disc settings to hunt with and get good at that which I recommend.
Use all metal just to check good targets for now, when you know you are swinging over something good like a coin see how it acts and sounds in all metal too, slowly get used to it.
One day you might want to hunt in all metal, we do this because it is usually the very deepest way to hunt, but right now it might be pretty frustrating for you.
Or maybe not, try it if you want but it does have just the single threshold tone which you don't seem to like using much at this point.
At one time I didn't either...things change.

On my F70, or on F75's that don't have DST I assume, there is a huge difference in the amout of noise between 0 and 1 on the disc...huge!
If there is not on yours well great, that DST is working for you.
There is way more EMI affecting 0, more targets in the soil this thing will pick up both big and small, for those that can learn to deal with the noise on 0 disc especially in really heavily iron infested or trashy sites the rewards can be great...but not that many can do it or want to do it.
Use 0 if it is working for you and not jumping around all over the place use it.
If default is 0 the factory must consider it quiet enough, with the old pre DST units factory disc level was 15...for a reason.

Threshold...
On units like my Tesoros in all metal or on several other brands and detectors like these fishers the threshold in all metal is that little hum you hear...The constant one that won't go away.
In all metal when you go over metal that threshold changes, flutters, zip zips on shallow stuff, it doesn't stay the same as just waving it around in the air.
This is how you know you are swinging over metal...when that threshold changes.
Set your thresh down to -9 in all metal and listen to he threshold hum then start turning it up through the negative numbers past 0 and all the way up to 9 in the positive.
Notice that threshold gets louder and louder as you travel up.
This I because it is opening up its eyes and ears wider and wider as it goes higher, taking in more and more information, seeing and locating more and more targets that get smaller and smaller and deeper and deeper.
It is making the weaker signals stronger as you push it higher, both deeper and smaller weaker signals.
Again without DST +9 on the thresh us usually one hot noisy mess in both all metal and in disc.
Why in disc?
Because in disc it is still there affecting all things, it acts the same, does the same, opens up its eyes and ears the same, magnifies all signals on the higher numbers the same as in all metal...only in disc it does it behind the scenes and you don't hear that threshold tone like in all metal...at all.

At 0 the thresh is a partially open door and you see a lot of things on the other side, at negative you see less, at positive numbers up to 9 where it is wide open you see, and hear, the most and the deepest in both disc and all metal.
And the more info you set it to take in the noisier it can get.

Again not sure about yours but on mine in multi tones, 3-4H, anything past -2...-1 for sure on the thresh, it affects the way the tones sound, it distorts them.
I don't like it so I don't do it or if I am pushing that thresh up high I switch to one of the lower tone options.


After checking your manual it appears you don't have thresh settings on your disc side, like I do...I did not know that.
Evidently when you set a thresh number in motion all metal it transfers over to the disc side as well which is why it is not there on your disc side that you can see.
It might not skew the multi tones as it does in mine so in that ours are different.
Honestly I don't like that.
I love the fact that I have full control of all settings over program 1 and 2 on mine, nothing is shared except the ground balance so score one for the F70.
But you do have all those extra processes in disc I don't like FA and all that so maybe some will consider that a score for the F75.
I don't have them so I never used them and I don't miss them and still seem to get along ok.

So in your case you do have 2 settings that are shared by both the disc and one of your all metals...threshold and ground balance.
The ground balance you set in all motion metal also affects disc mode and I assume the static all metal option... on static all metal the threshold is always at a factory preset level and you can't change it.
The Threshold you set in motion all metal also affects the disc, but again it does it behind the scenes and in disc you can't control that setting in but you can change threshold levels in disc by going back to all motion all metal and doing it there then switching back to disc.
Hope that clears up the threshold stuff for you.

As time goes on you will see that by setting the thresh at different levels will affect the signals you get, see and hear and someday you might want to change it up a little...but for now factory levels seem to work fine for you.

Here are those settings you put down...

Left Side:
DISCRIM......defaults & (my settings)!
Sensitivity.............80 (75)
Disc Level...............0 (0)
Notch.....................1 (1)
# of Tones.............2F (3)
Process #..............dE (dE or PF)

Right Side:
ALL METAL
STAT / MOTION
Threshold.................0
Audio Pitch...............0
Sensitivity...............80
Manual GB..............90


The disc side looks easy to use to me, again 0 on the disc setting is a little strange but that DST must really quiet it down.
I use 0, I use 1, when I am in a trashy site with a ton of garbage and foil I don't feel like digging I sometimes go up to 23 but never higher.
In multi tones I rarely use anything but 3H or 4H.
It causes lots of extra junk to come in high which can be stirring to listen to, but it also makes nickel area gold come in high so I can notice them easier and I have found gold because it did.
Hard to change from what works in the past sometimes.

On the right side I see that threshold setting, the pitch control but that manual GB setting at 90...man that is high.
Are your GB numbers always that high, if they are you got some hot soil.
That's fine, you can deal with it but if mineralization is the cause that can cause some strange behavior on deeper targets but that happens here to me all the time so I can clue you in if that is happening to you.

Anything still confusing you ask me again.

I got to break these up - too many questions - too many answers - they all run together.
-------------------------------------------------------------------------
Again, I don't think I am understanding your use of the terms, disc 0 and disc 1.

You said > On my F70, or on F75's that don't have DST I assume, there is a huge difference in the amount of noise between 0 and 1 on the disc...huge!

On my F75, the second setting on the DISCRIM side, is "Disc Level". It ranges from 1 - 65. At "0", nothing is discriminated from detection. At "1", only the iron items that would have registered "1", are discriminated. I can not understand how removing on target # would be a "huge" difference. You are only eliminating iron #1. Now if you ran it up to 15, then that would make sense, and it would eliminate all iron (1 - 15).

Threshold

Threshold...
On units like my Tesoros in all metal or on several other brands and detectors like these fishers the threshold in all metal is that little hum you hear...The constant one that won't go away.

I don't know about the hum you mention, that is always there. My manual says that the unit should be silent, unless it is detecting a target, and it is. I don't have a hum. Again, this is very confusing.....

----------------------------------------------------------------

Threshold

Again without DST +9 on the thresh us usually one hot noisy mess in both all metal and in disc.
Why in disc?
Because in disc it is still there affecting all things, it acts the same, does the same, opens up its eyes and ears the same, magnifies all signals on the higher numbers the same as in all metal...only in disc it does it behind the scenes and you don't hear that threshold tone like in all metal...at all.

I don't believe that Threshold is active on anything but "All Metal Motion" and "All Metal Stat", and it can't be adjusted in Stat mode. There is no mention anywhere in the manual, of Threshold, so far as DISCRIM goes (?)

-------------------------------------------------------------------

Again, I suppose I need to wait a while on Threshold. I know you have tried to explain, but I am just not understanding Threshold - what it is - what it does - why it's needed - or why I would want to mess with it.

Again, it's a mental block on my part, I suppose. I've read and digested everything you have said, plus everything in the manual, and it's just not coming through. No problems with anything else, but Threshold ain't getting in ?? I can not put a logical reason on why that setting is called Threshold, nor a reason for using it..........

----------------------------------------------------
Again, I don't think I am understanding your use of the terms, disc 0 and disc 1.

You said > On my F70, or on F75's that don't have DST I assume, there is a huge difference in the amount of noise between 0 and 1 on the disc...huge!

On my F75, the second setting on the DISCRIM side, is "Disc Level". It ranges from 1 - 65. At "0", nothing is discriminated from detection. At "1", only the iron items that would have registered "1", are discriminated. I can not understand how removing on target # would be a "huge" difference. You are only eliminating iron #1. Now if you ran it up to 15, then that would make sense, and it would eliminate all iron (1 - 15).


A huge difference in noise, chatter and numbers jumping from 1 on the disc to 0...on non DST units.
You have no experience with this so just trust me...it is true.




Threshold...
On units like my Tesoros in all metal or on several other brands and detectors like these fishers the threshold in all metal is that little hum you hear...The constant one that won't go away.

I don't know about the hum you mention, that is always there. My manual says that the unit should be silent, unless it is detecting a target, and it is. I don't have a hum. Again, this is very confusing.....


You have a threshold hum...in motion all metal, or it is on just about every other detector that has an all metal setting on the planet.
When you hit a pinpointing button on most detectors that hum you hear is the threshold.
Unless they have done something completely different in the programming in the motion all metal side I don't know about it should be there.
Turn the thresh up past 0 when in motion all metal if you can't hear it on that 0 number and it should show up.

When you hunt in disc that is called silent search...The unit sounds off when it is over metal but shouldn't when it isn't.
Unless you are dealing with a lot of falsing and extra chatter because of high settings, that is.
DST calms most of this down or gets rid of it completely

Hunting in all metal is a threshold based hunting method.
That hum is there and alerts us to targets when that threshold tone changes both shallow and deep.
This is used by many as their prime way to hunt for the very deepest targets but it can be useful in other situations also.

----------------------------------------------------------------

Threshold

Again without DST +9 on the thresh us usually one hot noisy mess in both all metal and in disc.
Why in disc?
Because in disc it is still there affecting all things, it acts the same, does the same, opens up its eyes and ears the same, magnifies all signals on the higher numbers the same as in all metal...only in disc it does it behind the scenes and you don't hear that threshold tone like in all metal...at all.

I don't believe that Threshold is active on anything but "All Metal Motion" and "All Metal Stat", and it can't be adjusted in Stat mode. There is no mention anywhere in the manual, of Threshold, so far as DISCRIM goes (?)



Pretty sure that threshold affects the disc side as much as the motion all metal side.
It would be silly if it didn't because this is a real important feature especially on a flagship unit...once you understand what it is and what it does and how the ability to adjust it can be very helpful at some sites in some situations.

These manuals don't always give you all the facts, lots of info is confusing or omitted.
Don't assume just because certain things are not mentioned.

-------------------------------------------------------------------

Again, I suppose I need to wait a while on Threshold. I know you have tried to explain, but I am just not understanding Threshold - what it is - what it does - why it's needed - or why I would want to mess with it.

Again, it's a mental block on my part, I suppose. I've read and digested everything you have said, plus everything in the manual, and it's just not coming through. No problems with anything else, but Threshold ain't getting in ?? I can not put a logical reason on why that setting is called Threshold, nor a reason for using it..........


It magnifies weak signals...almost like having another sensitivity adjustment.
The sense and thresh have a close relationship and combinations of different adjustments can affect what you can pick up and find especially in the deeper regions.
Your sense setting at 75 and thresh at 0 in disc, (or motion all metal), might miss a seated dime laying at the 13" depth level but turn that thresh up to 5 or more and it might all of a sudden come in loud and clear...or at least come in at some kind of signal you can notice.
With that thresh at 0 it is possible your coil will pass over that dime so deep and not utter a peep.

Don't worry about the thresh thing.
Factory levels seem to be pretty high and perfect for all around hunting so you can learn to adjust it to your advantage sometime in the future.
This is advanced stuff, Rome wasn't built in a day and you don't have to know or take advantage of every feature, option and setting level at this time.
You are doing pretty good as it is, enjoy your time using your current settings.
If you are missing any 13" seated dimes they will still be there when you come back one day with more knowledge.

I am new with the F75, have used Tesoro's way back to the first C & G Bobcat, and also White's for many years. There is no provision for adjusting threshold ground balance on the 75 in disc mode, except for "fast grab" which sets gb to "0". Only in all metal mode can you manually adjust + or - gb. The detector sets balance at 0 with fast grab, In all metal you can manually balance and adjust it + or -. The manual does not specify whether that ground balance setting transfers from all metal to disc., if you switch over to the disc side of the detector after setting it manually.