Results of testing my repaired F 75 :surprised:

[digitrich]

I put a quarter on a yard stick with some duct tape and I cannot swing that yard stick past my coil fast enough for that machine not to be able to pick up the quarter. This thing is impressive. In an air test, I can pick up a dime at ten inches and have it ID correctly and a quarter at about twelve, both my SE's cannot do that, that may mean allot or nothing, as it is an indoor air test only. And it seems I can get two completely distinct tones from the two separate targets, the dime and quarter, with them spread as little as four inches apart as I run them past the coil one after the other. This is all with the stock new coil they sent me with my now fixed machine. This is inside with electrical interference, in DE mode, no ground balance, sens 69. Now if the snow melts, I am going to wear this thing out.

 

[Charlie P. (NY)]

I can't do a good indoor air test. I have too many motors, wireless phones, chargers, etc.

I've been swinging mine 9 months and I don't think it's possible to swing it too fast. You're more limited by your ability to sweep the coil level and wide but flat than by any balking from the unit. No "averaging" with this baby (optomistically called "locking on" by those with slow units).

I had a target reading 45-58, 58-45 every time. When I dig it I found a 30-06 rifle case. It was fast enough to read each end and repeatably! I've got nails and pulltabs over cents in my test garden and 1" horizontal seperation (4" vertical) will allow a good enough signal that you can tell there's a cent under trash. That's damned impressive! No "null" from the iron that masks the cent!

 

[Scully]

If you like the depth "inside", you are gonna love what happens in the field! Get a bigger shovel!

 

[digitrich]

Yeah Skully, that's what really impressed me, I know my Explorers get better depth in the soil than in the air, so if that's the case with the F-75, I am going to love this machine. Can't wait for this damn snow to melt. I am suffering some serious with drawl.

 

[digitrich]

If I could find a silver dime in a hole with 3 or 4 nails in the same hole with my slow SE's response, I should be able to find allot more with this thing. Shame FT didn't buy Mine lab and come out with an Explorer 3, with no change but a faster processor, that would be a beast

 

[Chris(SoCenWI)]

Digitrich,

I don't think the faster processor has has much to do with the masking as coil type. I have yet to do the coin under a nail test with the F-75 but with the XS you would get a great signal from one direction and none at all 90 degrees away. I just got both machines back from the factory and maybe could go out in the snow and test.

Chris

 

[christopher-ohio]

n/t

 

[liquid1]

I was just messing around the other day and inside my dads log house not as busy as my house with EMI and I air tested a Dr Pepper can at a well respected 15" in JE mode F7 90 sense..The F 75 will literally give me 2 zinc tones across my platinum wedding band as Fast AS I can swing the machine..BAM-BAM..even on edge picks up both sides of the Band..verry impressive recovery..Fast..I have found that with old old rusted steel metal Iron with rust stains will give off a good Hi-Tone like its a cool coin..I wonder if the Minlab Se will do the same..yet once pulled up and laid back out on the ground in Disc 10-19 it want pick it up..But does in the ground 2" or deeper..No matter what setting or which coil I use..Lots of that kinda stuff around here..err...

 

[digitrich]

Yeah, I am not giving up my SE...Ever! But I am determined to find a specific use for this F-75, that outperforms my ML's in some way on some specific occasion, right? I may end up using it as a scout to search a large field quickly and pinpoint the hot spots. When this snow melts, I am going to run them head to head and see what's what. Ralph has promised me a probe and that should be here soon.

 

[liquid1]

[quote digitrich]Yeah, I am not giving up my SE...Ever! But I am determined to find a specific use for this F-75, that outperforms my ML's in some way on some specific occasion, right? I may end up using it as a scout to search a large field quickly and pinpoint the hot spots. When this snow melts, I am going to run them head to head and see what's what. Ralph has promised me a probe and that should be here soon.[/quote]
where is your location and how is the soil..it will be great to here a comparrison of the 2..

 

[Low-Boy/LCPM]

This always gets me, but as you know you just have to dig it when it is a good signal and clear it out of the way for what may be hiding near it. The more trash you remove the more good targets get unmasked. FACT OF LIFE BUDDY

 

[Lt4ever]

What was wrong with your detector that required repair. I just sent mine because it would go nuts if you bumped it or shook it. I am also getting the upgrade while its there.

 

[liquid1]

[quote Low-Boy/LCPM]This always gets me, but as you know you just have to dig it when it is a good signal and clear it out of the way for what may be hiding near it. The more trash you remove the more good targets get unmasked. FACT OF LIFE BUDDY[/quote]
I hear ya low boy..I am with you 100%.. look at what i just pulled up..I think this is 1800 stuff..The F75 is a finding monster..

 

[digitrich]

Had a short in the head phone jack, my Five pin connector was too tight or distorted and my coil was out of balance (whatever that is). But they fixed it and I had them do the upgrade. So we wil see.

 

[digitrich]

I am out in Iowa, the soil is not so bad here, the F-75 GB's at about 56-57.

 

[MattR]

[quote digitrich]I am out in Iowa, the soil is not so bad here, the F-75 GB's at about 56-57.[/quote]

Hi there Dig!.......I appreciate you quoting a typical soil figure.....can you expand a little on your description of the soil that produces such a reading?

Colour of the soil....Black, brown, grey?..etc. Also any apparent dampness. The figures you quote suggest a darker soil, possibly acidic. Do you think it is a soil that has been 'cultivated' or seen human habitation over some period? Here in the UK when ever I've encountered such soil giving those readings, the ground appeared to be what I call 'made up'. By that I mean soil that contained other than the original, where other soils had been dumped from alternative sources. Another such soil being one which is a little 'boggy', and subjected to cattle grazing.

The reason for my interest is to try and interpret the soil's history,(if any). It is a very speculative subject, but if we can derive even a very rough idea of what factors can be related to 'bands' of ground phase readings, then that can only be helpful. Also, the Ground Phase reading will affect the Target Identity value, compared to the same target's 'In air' TID. The degree of effect depending on the target's mass and depth. It is also very important to quote any Fe readings, if evident.........Thanks again.....MattR.UK.

 

[liquid1]

[quote digitrich]I am out in Iowa, the soil is not so bad here, the F-75 GB's at about 56-57.[/quote]
sounds great..you should be getting the good deep targets..my ground reads70-90 fast grab usually around feo .02 to .3 its the good ol, NC red clay..and lots of time the color will turn from red to dark brown to black then back to red if I dig 10 inches..