Experienced f75's, some advice please

[digitrich]

The manual says a faster coil sweep the better, are you guys still getting good depth if you swing slower, especially in thick trash? On a site with low mineralization, what kind of sensitivity can you push?? Someone told me he was running real hot at 85-90. I wish I could set a little iron reject in all metal, and could have more than two tones in all metal. But all in all, this thing is a beast, once I learn these tones and get used to it I am pretty confident that this is going to be a faster explorer with less tones and no iron mask screen, sound about right?? And if you can run it hot, it may prove deeper, I've got a sight my SE pulled 12 to 14 inch dimes out of with a ten and 14 inch coil, I'm going to try this f75 there and see what she does. Any advice would be appreciated. Good bing bonging to you

 

[AndyNM]

............what kind of sensitivity can you push??

I like that question because it is like asking what speed you use with your ATV in the desert.

What sensitivity and modes can be used are controlled by the ground conditions and location (interference free or not).

I always start in the DE mode, Disc 10, sensitivity 50.

If you can push sensitivity high in that mode, it is an indication that you may be able to use the JE mode. But before you switch over to the JE mode make sure to lower the sensitivity. Because you can run sensitivity at 90 in DE mode doesn't mean you can run that same sensitivity in JE mode. On the other hand sensitivity at 60 in JE mode can be deeper than sens at 90 in DE mode. Some locations may not allow to use JE mode but DE mode could work just fine.
The target is to run as much sensitivity as possible while remain a very stable detector. That balance changes with ground condition and location.

The sweep speed is not that important. I can swing slow and still get good depth.

Hope that helps,

Andy,NM

 

[MattR]

n/t

 

[AndyNM]

n/t

 

[Charlie P. (NY)]

I can't top a 14" dime, but I've hit 9" with a clad dime and 8" with Memorial cents so far. And it's been as dry this past few weeks as August usually is (though we just had a rainy weekend).

The F-75 really does reward a faster sweep. Something like a full five foot sweep in less than two seconds.

For sensitivity, there is a "trick". In pretty solid discrimination (45 with nickels notched back in) I can run 35 to maybe 40 at my regular park. With a low discrimination (6 with nothing notched at all) I can run 80 or even 85 at that same park. At home, where there is little EMI (we don't have traffic OR cable) I have run as high as 90 before it starts to twitter on that Ultra-Low-Discrimination setting. JE is VERY sensitive from my observations. Even in low discrimination I have to tone her way down below 50. I usually play in either the default or bottle-cap modes. If you are in an area that gives lots of falses try the PF (plowed-field) mode. It seems to be a very calm runner. No doubt because it "numbs" the responses to accomidate what would be disturbed soil and the coil being 1" to 5" over the soil in the furrows. If that's what it takes to get a hunt in - so be it. Some depth is better than leaving.

 

[duggr]

Charlie
I Planted a Siver Quarter at 12" a week ago! Yesterday I took the F75
out to see what would happend and discovered that No matter what the setting on the sensitivity was, I could not pick the quarter up in either the De,Pf or Bc modes. When I set the F75 to the Je mode I could easily pick up the quarter, even with the sensitivity set at 30, I could even lift the coil 2-4 inches and pick it up, although with a slightly faster than my normal sweep was required. Settings were, Discrimination 7 and fast grab was 62. The
F75 would Lock on to 12 on the Digital I.D. consistently. If I was using tones I would have went on by. I'm shure a coin that has been in the ground longer would have different results,but I still think this was an interesting little test. The Conditions were as good as I was ever going to get as we received some excellent moisture the last week and the F75 was able to run stable in the Je mode. The day I planted the coin I couldn't even run the Je mode as there was an excessive amount of electrical noise that day.

 

[Charlie P. (NY)]

Definately have to give the JE more play time. It is the twitteriest of the settings for sure. Make a good test to go back through where I've been and see if anything else chimes in.

 

[digitrich]

n/t