Thoughts on Fisher F2

[MarkCZ]

The F4 Auto Tune which is the only time threshold is available. is used for ground balancing which when your done you switch over to either Disc or A/M.

Well, here again from what I'm reading this isn't true either.

From the F4 manual,

DISCRIMINATION (THRESHOLD) + AND

 

[Dave J.]

This thread has devolved into so much nonsense that someone seeing it for the first time and lacking a playbill would have a hard time figuring out what the heck it's even about!

So let's get back to basics.

1. The F4 is the F4. The F2 is the F2. Two different models with two different price tags. For some folks the F2 is the best machine for them, and for other folks the F4 is. Of course we have a lot of other models too.

2. If an error in the F4 manual has been posted, please point to it and I'll be happy to pass it on to the people who write the manuals so it can be fixed in the next reprint.

3. Because metal detectors involve technology that's unfamiliar to people who aren't engineers in this business, there's a lot of urban mythology about metal detector technology out there in beeperlandia. And "ground balancing in discrimination mode" has become part of that mythology. The facts are that some machines do, some don't, there are sound reasons why manufacturers do it both ways, and in most ground conditions it makes very little difference.

--Dave J.

 

[Dude]

So, based on the above the "threshold" is or can be "An Audible Hum Active At All Times" of course in the Auto Tune search mode.

From the above, the Threshold isn't just for a ground balancing noise and then switching back to discrimination mode, yes! you can do that, but its more than that. The F4 has a "Motion All Metal Search Mode" called "Auto Tune"
You could search all metal in the Pin-point mode but they're some problems that go along with that, pin-point mode will drift and so every couple of minutes you have to release the pin-point button and press and hold it again, plus its a no motion mode. (the only all metal option you have on the F2)

So, the F4 has a Auto tune "Motion" mode that can be selected and it doesn't drift and "Auto Tunes" Also, when adjusting the "Threshold" you don't have to switch to All Metal mode to run it with a audible hum, if your adjusting it, your already in the "All Metal Auto Tune Mode"

And here is something else I found interesting in the F4 manual about the "Auto Tune Mode" it seems possible?? that the manual ground balance feature is necessary for the "Auto Tune Mode" to work properly, or at lest some form of ground balancing, See below,



Mark

Your right it does state Auto Tune can be used to search with, but why they put that in the manual is a mystery to me. I've tried hunting in Auto-Tune several times and it doesn't take long before your ready to wrap the machine around a tree. The machine gives zero information as to whats it's seeing, just lifting the coil an inch causes sound. You can get the same affect with the F2 by holding down pin point full time.

 

[Dude]

This thread has devolved into so much nonsense that someone seeing it for the first time and lacking a playbill would have a hard time figuring out what the heck it's even about!

So let's get back to basics.

1. The F4 is the F4. The F2 is the F2. Two different models with two different price tags. For some folks the F2 is the best machine for them, and for other folks the F4 is. Of course we have a lot of other models too.

2. If an error in the F4 manual has been posted, please point to it and I'll be happy to pass it on to the people who write the manuals so it can be fixed in the next reprint.

3. Because metal detectors involve technology that's unfamiliar to people who aren't engineers in this business, there's a lot of urban mythology about metal detector technology out there in beeperlandia. And "ground balancing in discrimination mode" has become part of that mythology. The facts are that some machines do, some don't, there are sound reasons why manufacturers do it both ways, and in most ground conditions it makes very little difference.

--Dave J.

You may want to pass it on that the manual has misleading information.

Page 12 of the manual states
"Ground Balancing is the process by which the metal detector cancels
the unwanted signals coming from the ground minerals while still
detecting the signals from buried metal objects. This is accomplished
by calibrating the detector