F-75; Most Important Depth wise; GB or fe3o4

[Jackalope]

Got started asking questions and now having trouble stopping. Considering that bad ground affects depth on the F-75, which has the larger affect on depth; GB or fe3o4? In my area the GB is usually anywhere from 83 to 89. Also shows as -95 on my XLT. I'm thinking this is pretty bad soil conditions but the fe3o4 is usually never more than .03. So the type of ground is bad but the amount of magnetic stuff is reasonably low.

Question is; which value affects depth the most? Without going into the details, my air tests on the F-75 are way beyond what I might have expected. Recovering targets at 8" is common. On non-groomed areas I use my Lesche Ground Shark with the 12" blade, so it's easy to get accurate depth readings. I'm wondering if the bad ground/fe3o4 is causing depth loss on the F-75 great enough that using my XLT would get me just as deep because of the Auto/Trac? Do notice that the ground stays bad consistently which means I need to use a tracking speed of 18 or higher on the XLT.

Ron

 

[XLT-user]

After using the XLt series for many years, and now adding an F75. In my opinion the F75 is a much deeper machine. As the XLT tracks you loose some depth as we all know. It never really catches up to the ground changes. On the F75 you can hunt without ground balance in DE mode and still get 8-9 inches on coins.Fast Grab the ground balance and your good to go unless a drastic change occures in the ground with the F75.The F75 is about the deepest detector I have used.

 

[thompy]

i use the t-2 with very similar ground conditions, i would have to say the GB is very important, and i get good depth, the whites classics with preset GB also did pretty well here, but if i get into the magnetite an the beaches, depth goes out the window real fast, we have some tougher conditions up north around the old gold mines, and around one of the lakes where the GB can be 73 then 10 ft away your into a 91, there is a lot of iron ores in the area as well, but generally the same as yours, i don't pay as much attention to the Feo3 as much as i should, generally .03

 

[daryllpugh]

This is a good thing about the F-75. I had a XLT and I would'nt take nothing for my F-75. I've found targets that I missed with the XLT. The area I'm hunting is usally .03+. I hunt with the all metal and set the sensitivety at 90-99 depending on the noise of the sound. If it's broken I back off. You want a steady hum. With this you want miss the small deep targets. I recently dug 2 small pistol bullets at 18 inches. And I was blowed away by that. It will register an iron signal. But it will jump from 20-60. As for the fe scale. I watch closely and ground balance when it changes. I don't use disc. mode. Because you'll miss deep targets made up of lead content.

 

[Jackalope]

Actually, I considered selling/trading my F-75 for one of the newest/latest machines out there but for deep cruising, the F-75 is the best. Problem is not with the machine but rather with my interpretation of what it is trying to tell me. Asked my wife what she thought about me selling the F-75 and she said I shouldn't. I'm thinking; who am I to argue with her?

I'm going to keep my old friend, the XLT. Although I'm not familiar with all the brands out there, I'm thinking the White's machines are probably the only ones that allow the user to exclude individual VDI numbers, which I plan to make good use of. Like I mentioned before, I have to use a Auto/Trac tracking speed of 18 or more because the soil remains consistently bad. Indications (Tracking every 3 to 5 sweeps) is that it's doing the job it was designed to do. It's a keeper!

Ron