When Air testing I can get clean, longer signals that repeat, in the ground however, it's totally different. Even shallow targets, less than 4 inches, I get squashed, weak, non repeating signals and never get more than three confidence bars unless it's iron at 2 inches deep or less. I"ve had it all summer and i've tried it in at least 10 different spots, with my settings varied, according to the help pages, gb added 3, disc 5-19 de mode 3h 4h and I honestly can't get a clean, repeatable signal out of it. and in order to get any signal out of it, I have to whip it back and fourth like a switch stick any slower and it won't pick up nothing. My Explorers all give long discernable clear signals, this thing nothing but chirps and those chirps don't repeat. Is it possible I have a bad coil or is it the machine? At first I thought I just needed to put my time in to learn the machine, which was hard to do when I already had others I was great with and had ten different size coils to choose from and an x-1 probe, so I decided to pop out this one for at least a half hour on every hunt, same way I learned all metal on my explorer, well this machine just doesn't work right, I now realize this and I'm wordering if you guys have the repair number as I need to call. Thanks again
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My f-75 isn't really chattery, I can't seem to get a clean signal with it
- Thread starter digitrich
- Start date
Take your batteries out, check your battery contacts, and then put a TESTED set of high quality alkalines in it.
Reset the machine to factory settings,
and then do this:
Sens: 65
Disc: 6
Notch: none
Tone: 2f
Process: DE
find a real clean piece of ground and do a manual GB. If your in half decent ground, it will probably be between 60 and 70. THEN, do a fast grab from Disc mode, and see if the numbers are the same. If your getting really high GB numbers (95+) or Fast grab and maunal GB dont match, you probably have a bad coil or machine.
Be SURE your coil connector is TIGHT!
bury a target (like a copper penny) in a clean piece of ground at about 6 inches, dampen the soil and tamp it down GOOD!! (very important). if you've GB'd correctly the F75 should get the targets with EASE, and give you a nice clean signal, but it STILL wont sound like your other machines.
Is your ground very very dry this summer??
The 75 works pretty decent in dry ground, but it still works much better in damp soil.
While I do have certain pieces of ground I hunt that I struggle to get a clean signal (lotsa iron contamination) most sites give a nice clean crisp signal on coin type targets. DONT look for a signal like you get from your minelab or Whites machine. The 75 has its own sound, and thats what you going to have to learn. Its always a mistake to compare signals from different machines, because it like comparing apples and oranges. The super fast response/recovery speed of the 75 wont allow a broad audio response like say, a Whites Xlt will give you. likewise with the minelabs. The 75 prefers a faster swing speed than all the minelab units to process the signal correctly, and give the best depth and ID. It took me a while to learn I can trust the Id on the F75, but you have to sample the target just like the manual says. Briskly and with a fairly wide swing. Its doesnt sound as good (the audio) when you do this, but the ID is MUCH more accurate when you do it right. When you swing slowly over a given target it tends to ID a bit on the high side. Swing it briskly and a bit wider than you might want to, and it will sound choppier, but the ID will be pretty darn accurate then. I use a moderate swing speed when I'm just walking along, but when I'm analyzing the target, I step it up quite a bit.............
( I also tend to use De most of the time now with a high sens setting, and just use Je to evaluate a target)
Reset the machine to factory settings,
and then do this:
Sens: 65
Disc: 6
Notch: none
Tone: 2f
Process: DE
find a real clean piece of ground and do a manual GB. If your in half decent ground, it will probably be between 60 and 70. THEN, do a fast grab from Disc mode, and see if the numbers are the same. If your getting really high GB numbers (95+) or Fast grab and maunal GB dont match, you probably have a bad coil or machine.
Be SURE your coil connector is TIGHT!
bury a target (like a copper penny) in a clean piece of ground at about 6 inches, dampen the soil and tamp it down GOOD!! (very important). if you've GB'd correctly the F75 should get the targets with EASE, and give you a nice clean signal, but it STILL wont sound like your other machines.
Is your ground very very dry this summer??
The 75 works pretty decent in dry ground, but it still works much better in damp soil.
While I do have certain pieces of ground I hunt that I struggle to get a clean signal (lotsa iron contamination) most sites give a nice clean crisp signal on coin type targets. DONT look for a signal like you get from your minelab or Whites machine. The 75 has its own sound, and thats what you going to have to learn. Its always a mistake to compare signals from different machines, because it like comparing apples and oranges. The super fast response/recovery speed of the 75 wont allow a broad audio response like say, a Whites Xlt will give you. likewise with the minelabs. The 75 prefers a faster swing speed than all the minelab units to process the signal correctly, and give the best depth and ID. It took me a while to learn I can trust the Id on the F75, but you have to sample the target just like the manual says. Briskly and with a fairly wide swing. Its doesnt sound as good (the audio) when you do this, but the ID is MUCH more accurate when you do it right. When you swing slowly over a given target it tends to ID a bit on the high side. Swing it briskly and a bit wider than you might want to, and it will sound choppier, but the ID will be pretty darn accurate then. I use a moderate swing speed when I'm just walking along, but when I'm analyzing the target, I step it up quite a bit.............
( I also tend to use De most of the time now with a high sens setting, and just use Je to evaluate a target)
Low-Boy/LCPM
Active member
It is too bad fisher is having such problems with the F75 for such a new machine this is not a good way to start. No new coil after almost a year this would have been the time for Fisher to nail the coffin shut on all the other companies out there trying to get a piece of the market. You come out with a new coil and get the existing users all excited again. We seem to live in a world where we are going backwards not forward and when a chance opens up for a company to take the lead and do the right thing they don't. If fisher would listen to their users maybe we would have a company that could move forward.
Well, after talking Friday to about 8 people including a tech and an engineer, they asked me to send it in so they could check it out, so we'll see what happens, hopefully it will come back working as well as some as you posters have found, "a machine as deep as an explorer only with a faster response time". Funny thing is, I bought my second Ex SE used from a guy who got a new f75 and decided he didn't want the SE anymore, so I'm guessing my f-75 needs fixing. Thanks for the posts. I will post the results when I get it back.
Idaho-Marke
New member
I honestly can't get a clean, repeatable signal out of it. and in order to get any signal out of it, I have to whip it back and fourth like a switch stick any slower and it won't pick up nothing. My Explorers all give long discernible clear signals, this thing nothing but chirps and those chirps don't repeat."
The problem with whipping it back and forth in trashy areas is instead of just one good signal, five other sound off as well and if you slow it down to seek out the good signal, you may not hear the good signal at all again. I've tried turning 90 degrees, this way that way and the funny thing is, well not funny at all but... it seems over time this has become worse and worse. Sometimes it's killer in trash and other times the trash kills the signal.
I too was one of the first to buy an F-75 and have used it all summer in many different places in three different states leaving my MXT gathering dust. I love how light the machine is and thought I just needed to put in the time, but after today, I think I've got some problems too unfortunately.
Love to hear how your situation worked out. Are you happy now and does the machine lock on now?
THx.
HH
The problem with whipping it back and forth in trashy areas is instead of just one good signal, five other sound off as well and if you slow it down to seek out the good signal, you may not hear the good signal at all again. I've tried turning 90 degrees, this way that way and the funny thing is, well not funny at all but... it seems over time this has become worse and worse. Sometimes it's killer in trash and other times the trash kills the signal.
I too was one of the first to buy an F-75 and have used it all summer in many different places in three different states leaving my MXT gathering dust. I love how light the machine is and thought I just needed to put in the time, but after today, I think I've got some problems too unfortunately.
Love to hear how your situation worked out. Are you happy now and does the machine lock on now?
THx.
HH
Well I hesitated sending it in because I wanted to see if the smaller coil would make a difference, and it didn't. Then I got a second pair of Sun Ray headphones, the first pair didn't work on the F75, so I would know if I had to send my headphones in. Well, they both don't work with it but my Koss and Rats do. So, I know for sure I've got at least a headphone jack problem and it's nothing to do with the coil. When I first got my SE, I thought there was something wrong with it and there was: I didn't know how to use it, but once I put a smaller coil on it, I learned it pretty quick. I was hoping that was the case with the F75, but it's not. I am sending my F75 in this week and after they fix it, if it works as well as others have found, why, I will brag it up with the same intensity that it will then deserve. But in my case, in probably 15 hours usage, at about 5 different sites, I've only located three targets, it is not working period, I've just been lazy getting it set in for repair and I wanted to check on these other issues first With what you described, it sounds like electrical interference, especially, if it was a one time event. But there has been allot of posting about that gain that occurs with disc below 5 or above 19 and you may want to check that out. My SE's have days like that and because I have two, I just turn on the other, if I get the same result, well then it is a hunting condition I need to overcome and it has nothing to do with the machines themselves. Every time, both SE's behaved in the exact same way as the other. This has taught me to trust my machines and made me learn better hunting techniques with them that I otherwise wouldn't know. I'm not buying a second F75 though, because I wouldn't buy one used and I couldn't afford another new one.