F75SE:fisher: Running Low Sensitity Works Just Fine

[tabman]

I haven't had my F75SE out for awhile, so I thought I'd take it for spin today. The area that I have been detecting lately has some really bad EMI. I set the discrimination on 7, GB at 72, boost mode and 3H for the tones. I first started out with the sensitivity on 60 but moved it back to 50. It ran pretty smooth at that setting. The 1964 Rosie that I found wasn't deep, but I did get a strong signal on a 7 inch wheat penny. When using the boost mode you don't have to run a high sensitivity to get good depth. You can see in the picture that I was using the NEL Sharpshooter coil. It has become my favorite coil. I also ended up finding a bunch of clad and some wheat pennies (1941, 1955, 1953, 1946, 1941).

One other thing. I have found it's best to go by the tones and not the screen ID. If I get a good audio tone I'm digging.

tabman

 

[mudpuppy]

Ya dont say? Dropping sens to half and going by tones? Who woulda thought? Sheesh, I figured all a guy would find at half throttle is zincs, foil, and trash?

Nice hunting Tab! I had no idea you were gonna run the 75 today, glad you did! It seems to take the F70/75 users a long time to finally drop sens and get things to run stable, then, a fellow can freakin' go to town! Speed sweep and hit real deep pings.....I hope you get a chance to take it out some more and find the 'break off' points in the disc and sens, as well as the coil speed etc......I value your skills and feedback!

I sure would like to see what you could do with that rig in Delta Pitch too? Talk about tone hunting bonanza! Which you should love! Modulated Proportional audio and all..you will know quickly what it is and how deep in short order... You may want to experiment this afternoon out in the yard, with the breakoff sens/thresh/disc points, coil speed and delta...I bet it would be fun for you!...better than watching the Tour DeFrance maybe..high fly that bad boy as fast as you can over a dime...no need to look at the screen except on setup and batt life..
Mud

 

[tabman]

Yeah Mud, I need to do some experimenting with the settings. It's been awhile, but I believe I was using 19 on the discrimination and got really smooth ride.

I haven't used the F75SE enough to get it all figured out. I did figure out that the tones are more reliable than the numbers. Who needs a screen anyway.

tabman

 

[REVIER]

Experimenting one day a few months ago I got a dime signal at 5" and I messed around with the settings on my F70 a bunch on that one.
I wanted to see how low I could go on the sense with the big F75 DD coil.
Eventually I got it down to 19 on the sense and in DE using 4 tones, threshold was at 0 if I remember right, and could still pick up the dime on every swing solid but the high tone sounded strange...like half of the tonal qualities were missing.
I flipped over to SL and the solid full sounding tone came roaring back.
I raised the sense up 11 to 30 and could raise the coil up 2" and still get the dime solid, sense up 10 more to 40 and the coil lifted another 2" and it was still there, sense up to 50 and 2 more inches on the coil height, (if the dime was indeed at 5" this would now put the coil at about 11" over the target), and still a solid tone and that is where I stopped.
I dug the dime and used a little ruler I carry with me and guess what?
That dime was exactly 5" deep.
After that experience I never had another worry about not reaching great depth on lower sense and still don't to this day.

 

[mudpuppy]

Preach! Word brother!... Mid/low sens and stable settings, high flying and fast, its not just for clad!...surgical, fast and accurate....throw in the modulated audio and a bit of time afield, F series is one heck of a weapon! I doubt anything else out there can hold its own against it on a speed sweep? Anybody can refute this, c'mon! I dont think theres a rig that can go any faster with such powerfully accurate audio feedback?
Am I missing something? Just saying, time and gold/silver wait for nobody......
Mud

 

[togg77]

Luv to hear you Pros talk shop---keep it comin'.

 

[kaolinwasher]

Intresting reading , I know the gold bug I had often did better at about 50 to 60 sense never tried the F 70 - 75 but looks similar in operation , nice dime Tab

 

[WV62]

Attached is a break point chart for sensitivity air test depth loss for my F75. In the top row I was taking bigger steps in sensitivity. When I notice the change from 9 to 10 inches I done the bottom row in sensitivity counts of 1 to get the actual break point. So from what I air tested I got the inch change between sensitivity setting 47 and 48.

I posted this before and got a post back from somebody saying that by using the low sensitivity settings what you lose some of the ability to see through iron. I can't prove that but it is something to consider when hunt deep coins.

I would like to know how you guys hunting fast and furious tell the difference from gold to junk, hunting the way you do. Do you just dig it all and see or can you some how tell the difference. As I was telling mud not long ago I think I could do the coin part of your style of hunting but as for the gold I don't have a clue.

Ron in WV

 

[REVIER]

Attached is a break point chart for sensitivity air test depth loss for my F75. In the top row I was taking bigger steps in sensitivity. When I notice the change from 9 to 10 inches I done the bottom row in sensitivity counts of 1 to get the actual break point. So from what I air tested I got the inch change between sensitivity setting 47 and 48.

I posted this before and got a post back from somebody saying that by using the low sensitivity settings what you lose some of the ability to see through iron. I can't prove that but it is something to consider when hunt deep coins.

I would like to know how you guys hunting fast and furious tell the difference from gold to junk, hunting the way you do. Do you just dig it all and see or can you some how tell the difference. As I was telling mud not long ago I think I could do the coin part of your style of hunting but as for the gold I don't have a clue.

Ron in WV

Interesting, Ron, but I am not sure most of us that use the F75/F70 units are all that fast AND furious...except mudpuppy of course, that guy is nuts!
I assume most of us go at different speeds, each to his own and all seem successful, but even though the Fishers are blazing fast I have always found that slowing down a bit finds me more.
It makes it a little easier to process all the tonal and screen information, anyway, and I try to process and use all that info I receive to make swift digging decisions in the field.
I have found more than my share of gold than should be allowed by law, 4 targets so far with the F70 in just the last 7 months...at least one with each coil, the standard elliptical, the large DD and the DD sniper, so this is what I can tell you from my experience.
No way do I dig it all.
Not with my Fishers, not with my Tesoros, either.
What I have done is attempt to really understand each unit's language as much as possible so I can leave the bulk of the trash in the ground and still be good enough to recognize gold signals if they show up...rare as that is.
I discovered using my F2 and my F70 for over 1000 hours total by now that the bulk of the trash out there, irregular shaped trash for sure, will jump and be unstable and not stay within a 2 or 3 number area when I swing the coils over them correctly and at the right speed.
Lots of trash will be stable and stay within a small number range too, can't get around that, but most of it will not and I usually will turn and hit stable trash targets in all gold ranges from at least one other direction to see if the solid trash signal numbers destabilize or change to a different range of numbers because I have found when that happens and I dig those it has always been trash, also.
Every target that was gold for me has been stable, solid in tones, stayed within my 2 or 3 number dig range if not just hitting on one number constantly...even the ones that came in trash areas in the numbers or out of areas with dense trash.
A couple were masked, I remember one had some foil or aluminum right next to it, another had a large and a small piece of iron within inches on either side, but in both cases I got a solid tone that peaked my interest if only for an instant between chatter and major jumping, and in both cases with my 2 biggest coils for my F70 I was able to maneuver that coil and get some quick but solid repeating numbers to stay on the screen.
Basically, if a signal is solid and stays within that small number range on repeated passes I dig it.
I dig some jumpy but still good sounding signals from time to time too if only to satisfy my curiosity, but most of the real jumpy stuff stays in the ground.
All gold targets I have dug have been at 6" or less in depth...well within the sweet spot on all my detectors and coils including my F2 and sniper coil in my good soil.
It well may be that deeper range gold will act differently and be way more jumpy so I check depth on some deeper targets in all ranges of trash if I heard a good tone...always my first and most important piece of info I process.
Screens mean nothing at great depth on the Fishers, in those ranges it is all about the tones.

One day I will come across some deep gold, hopefully, and notice something that triggers me to dig it.
Till then I can't really give an opinion on those targets at all, but there seems to be enough of the yellow stuff at shallow depths around to keep my gold fever at bay.

As fast as sense settings, with the biggest DD I will turn down to the 30-40 range in heavy trash to shrink that scanning field and figure out the trash, but using the sniper or elliptical I will go no lower than 60 in most situations and usually much higher into the 80 and up range if I am not in all metal.
I have learned to ignore the chatter, false tones, ghost signals and noise and home in on and recognize the actual good solid signals because of my great amount of time spent swinging the Fishers at high sense.



http://www.findmall.com/read.php?37,2064645,page=1

http://www.findmall.com/read.php?91,1993276,page=1

 

[mudpuppy]

Ron,
Tabman, REVIER, and Southwind all consistently find more than their share of dirt gold...theres a few others that have made a science out of it too...I do believe a fellow has to really focus on gold to find it with regularity...really think about the locations, tones, all that...its easy for a fellows ears to get sensitive to the high pings of silver, and ignore or not even hear the gold tones...of course a fellow can default to "digging it all" and come up with a super quick retrieval method, and commit to popping 200+ targets per day, over and over and over...its better to set up light and with clear tight tones so you dont have to dig it all, unless the location merits...if a fellow didnt dig anything but foil, nickels and tabs, he'd eventually find gold...big gold rings can be clear up into zinc penny signals, and there was one guy a few years back who found a big gold ring that hit like a Q...chains are another matter completely....

The thing all the great dirt gold hunters have in common is they leave the house looking for it, thinking about it, and believing they are gonna find it...then, they do!...so you pattern your style after what these guys do and what works in your area, and then just go and get it! Sort of what you guys did when you were hunting silver hard...you really focused up on it...same thing...except a lot harder on account of the wide signals and variables. Dirt gold is the toughest target out there to find...some fellows hunt their entire life and never find one gold ring, ...most likely on account of they have a different target in mind..Good Luck! oh, Revier has some vids on youtube that shows how he hunts and explains this very well...
Mud

 

[REVIER]

Yea, it helps to be insane enough to specifically target one of the most rare and valuable metals on earth, one that has thousands of years of history, has had a hand in the rise and fall of civilizations and has been the cause of the loss of life of an uncountable amount of human beings and still actually believe you can find some when you step out your front door on the way to a hunt.
Maybe mud isn't the only crazy one around here.

 

[WV62]

Guys,

So your settings I assume disc was low, sensitivity about anywhere, seems any coil but for the most part the 11

 

[REVIER]

I don't scrub the ground but I am pretty close most of the time with all coils unless I am over rocks in a parking lot or something like that and then I go a bit higher.
Rocket Tom says scrubbing the coil on the ground can help with the deep ones but I only do that when I actually do come across something really deep I want to investigate further.

Average depth for me on most targets, even the older coins and stuff is usually about 6" or less.
I have come across a few goodies at 7" or so, an Indian Head spill at 8" once, and a couple of beaver tail tabs at 10" for some reason.
Beaver tails and sta tabs at that depth come in as a high tone for some reason.
I hate that, but I still dig em when I get any kind of a high tone and I see close to or double digits on the depth reading.

 

[mudpuppy]

Mid/lowSens37-55, low disc4, -3thresh,DEmode, DP tones, no notch, 11"dd...pretty much my settings without change, be it a totlot, 37sens, to an open sportsfield with deeper targets, 55...sometimes I will experiment with sens up to 75 on deep loam/grass/snow where I may be hearing targets just slightly out of range of the 55...thats the thing..the F70 and I assume the 75 has that proportional audio...so a deeper target sounds not as loud as a shallow one...which is good, with the light sens, and a little practice, a guy can audibly tell from the ping the depth of the target...so of course, that dictates the coil height, and the depth of the grass of course...deep grass, I'm running 55 and just kissing the top of it on the swing..hitting good targets to 5"...then if a guy gets in the trash, or a lot of shallow targets, instead of adjusting sens, I adjust the coil height of the swing, and keep swinging through it....totlots, or along chainlink, under bleachers etc.. I'm 37sens, just to get up closer to the metal structures, listening for the strange overloads that make a slight noise change that is different than what the bare pole would make, signalling another target in there...

My primary hunting zone is surface to 5"..thats clad and jewelry territory. The gold rings dropped here are either in the grass roots, or 3-5" deep, chains have been the same.....everyday, first target I check after turning on my 70 is my wedding ring, I just sweep my hand over the top of the coil out of habit, and to get my ears and mind focused up again on that tone, which is exactly like a pulltab...

Anyway, running the same settings a guy gets to quickly know exactly what they are telling me about the area's soil structure and composition of drops...for instance, if a guy is getting a lot of beavertail signals (42tid) at 4"...you know you are in some older dirt than just the squaretab dirt...good chance for gold in an area like that, since gold jewelry (class rings) were cheap and plentiful in the 70's, as were wedding rings, and a lot more people were married back then and involved in outdoor sports more too... AND no titanium, tungsten, or all the other junk amalgams were on the market yet...now most of the old silver will be long ago hunted out, since its so sweet and crisp!, but not the gold! So you get to know a place and try to hunt the gold out of it thats been there for 40+yrs...not much more to it than that...find some active old dirt, examine what it is saying, and hunt in the top 5" at a likely gold drop location in it....Ron, I believe your soil is mainly that clay/chert mix? Maybe some deep loam down in the river bottoms? Find an old park or sportsfield and have a go...
Mud

 

[mudpuppy]

Proportional Audio is your best FRIEND for working the parks for gold! Lets say you are merrily swinging along, hitting old beavertails at 4-5", then all of a sudden, you hear one shallow at 2-3"! Better check that one! Lets say you are getting a lot of zincs at surface to 3", and then one chirps in deeper at 4-5"...Better have a look at that one! Also, it tells you the size and shape of the target...especially those small 3gr womens rings in foil (23tid) soft signal, small target, hard to stab...not loud like a big piece of foil or can shard, not jumping signals, solid, soft, and the right size...solid nickels you gotta go after no matter what depth, generally they are nickels, but every so often, its a gold ring, also hard to stab...which after a few unsuccessful pokes, a guy slows down and gently feels around for it..same with square tabs, pretty easy to stab, and if you cant easily, then slow down and fish around for a ring....theres a lot of missed gold within 10 miles of your house, just nobody hunts for it and it is usually an accidental find...now I gotta go, its already 4:20am, and that beach aint gonna sweep itself! Be back in a few...
Mud

 

[mudpuppy]

Tabman should pipe up on this topic, its interesting to watch both himself and Jimtn since they hunt the same area...both are outstanding hunters, both find all sorts of silver, Tabman finds a lot more gold and buff nickels,,,so why is that? You would think they would both find about the same amount of gold?...Jim gets his share, but Tab does way better than most, year after year...just one look at his daily junk shots gives a few clues.
Tabs an all purpose yet focused hunter...he thinks about gold, has a magic Genie too, which helps.. Funny thing, if you start hunting for gold, you will be finding silver along the way...the same skills apply, just a different focus.....no day is a disappointment if you go for clad/jewelry...age, amount, and depth of the clad can lead you to the gold..that includes totlots...good gold bearing locations..
Mud.

 

[WV62]

Proportional Audio is your best FRIEND for working the parks for gold! Lets say you are merrily swinging along, hitting old beavertails at 4-5", then all of a sudden, you hear one shallow at 2-3"! Better check that one! Lets say you are getting a lot of zincs at surface to 3", and then one chirps in deeper at 4-5"...Better have a look at that one! Also, it tells you the size and shape of the target...especially those small 3gr women's rings in foil (23tid) soft signal, small target, hard to stab...not loud like a big piece of foil or can shard, not jumping signals, solid, soft, and the right size...solid nickels you gotta go after no matter what depth, generally they are nickels, but every so often, its a gold ring, also hard to stab...which after a few unsuccessful pokes, a guy slows down and gently feels around for it..same with square tabs, pretty easy to stab, and if you cant easily, then slow down and fish around for a ring....theres a lot of missed gold within 10 miles of your house, just nobody hunts for it and it is usually an accidental find...now I gotta go, its already 4:20am, and that beach aint gonna sweep itself! Be back in a few...
Mud

Mud,
You kind of lost me here on the proportional audio, I checked the F70 manual for tones and you have the same selections I do with the F75. So it looks to me that 1F and 2F have variable audio pitch. But you say you are running Delta Pitch which does not state any proportional or variable autio pitch.

Here is a cut and paste from the the F75 manual, I didn't compare word for word to the F70 manual but at a glance they looked the same. I also did not read the whole F70 manual, so there could be another setting that I am over looking.

Guys,
I have been cutting and pasting your comments in to a word document, so I will be trying to work this hunting method.
Ron in WV

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

NUMBER OF TONES (# OF TONES)
This menu selection allows you to select the number of audio tones emitted by the detector.
Different search conditions, search objectives, or personal preference will determine how
many tones you want to hear. With the below settings, you can decide to hear the same tone,
regardless of the target category, or have different categories of targets induce different tones.
The

 

[jim tn]

Mud, although you could be right, it should be pointed out that jim tn doesn't post every find he makes and I know for a fact he doesn't post every gold find he makes for a strong reason that he has. Tabman and jim tn are two different kinds of hunters. jim tn likes target id machines for the simple fact he doesn't want to dig a pile of trash every outing. Most of jim tn gold finds annually could be deemed by accident. Bands and med size rings by digging nickel range readings and larger class rings by digging items in the zinc and penny range. jim tn takes the gold when it comes along, but simply doesn't chase it outing after outing. He loves finding silver and other old coins and relics. HH jim tn

 

[mudpuppy]

Well, the F70 has some sort of variable audio or whatever its called...one thing about DeltaPitch, a guy can tell all sorts of info about the target on the first ping...even a rotten zinc, that TID at 58 sounds different than a normal zinc at 61...a chucky cheese at 67 sounds "bigger" than two zincs stacked which have the same TID...now a copper P and a clad D both hit at 73...and they are very hard to tell apart by size. After all the thousands I've dug of both, I still cant guess them with any reliable accuracy...a canadian Penny is the real fooler, since it hits higher than a clad dime at 78, and makes a fellow think hes got some silver....silver rings are 81 mostly, and clad Q's are solid 84, and halfs are a solid 92...this is with my rig running my settings...

Delta pitch stops you dead in your tracks when you hit a seldom heard signal, like a 52 or a 55 for instance...all common tones become familiar, and those strange ones stop a guy dead!...even half a pulltab, or just the tail off a beavertail stops a guy...This may help, Looking back, since I've had the 70, I've got 6 gold in totlots, 4 small womens rings and 2 medalions...5 larger gold rings in the dirt of parks and fields..since its hard to chase foil in the grass probably, and easy in the chips of a totlot..sheesh, I cant remember how many off the beach, (including that one big chain, with the anchor on it, which hit in the 50's) but probably another 5 or 6...in what 4yrs? going into my 5th year as a detectorist now I think? So if I can do it, you sure can! I dont find many silver coins, maybe 10 per year..I do get a lot of silver rings though, and of course stinky piles of clad... One other thing, I did NOT find any gold in the totlots last year or so far this year, which may be saying something about the changing demographics and travel patterns or wealth of the people I hunt...all of it this year has been in the water so far, and only 2 gold rings, both really old drops...if you have a wadeable creek or swimming hole, you should go in and take a look...REVIER got 12 gold rings last year...ALL in the dirt! Not only that, but he's gotten at least 3 big mens class rings that I can remember, might be 4...all right in the Zinc tone! which keeps me digging those danged zincs and cussing his name constantly!
Mud

 

[mudpuppy]

Ha! Yeah JimTn! I know how you roll! Its an interesting dynamic between the two styles and focus, different gear and all...I know for SURE neither you nor TAB have found gold in the water...maybe thats on account of your location, or that you are both rightly afraid of cottonmouths or something...this is a good topic for its own thread though, hunting gold and all...I know Ayeti was knocking the stink out of it earlier this year with his F70...then he sold it, and we havnt heard from him since! Oh, he'll be back and posting I do not doubt...theres gold fever and silver fever pros on this Forum, me?, I'm an overall scavenger of anything of value, whether its a frisbee, empty beer cans, towels, or a pair of shoes! The detector just gives me a plausible explanation to be wandering around outdoors at all hours...
Mud