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Got my new F75 11" DD for my F70 today :devil:

C

Cal_Cobra

Active member
Been wanting to try the F75 11" DD on the F70 for a while, so I ordered it from Richard at Backwoods Detectors. Ordered it last week, got it today, that was fast (THANKS RICHARD!).

Going to test it out tomorrow, I hope it does what I suspect it'll do, if so it'll really unlock the potential of F70 out here in our mineralized ground (I was really impressed with the new 5" DD coil, it's just too small unless you need a small coil for the job).

hh,
Brian
 
I'm curious what produces the F70 with 11" DD! :thumbup:

If isn't secret, can you send in private message how many was the cost?
It's true i am an overseas detectorist ,so a different situation. :sadwalk:
 
You'll find that you can run it much hotter and be more stable, especially in tougher ground.
Looking forward to hearing how you like it.


w
 
I took my F70 out yesterday with my new 11" DD to test out. What better place to test it then a really pounded park that's been in use since the 1870's. GGP is the park, a great place to test any detector as you have massive amounts of EMI from Sutro tower, modern trash to contend with, but the possibility to find some old (for California) targets, jewelery or relics of the past.

I ran it with the following parameters: Disc=6, sens=80, mode=SL, threshold= -9, and nothing notched. I was impressed with the DD coil, finally I was able to run the sensitivity high on a large coil in conjunction with the SLow mode and I was able to slice through trash fairly easily. If I got a target what was bouncing from iron #'s to coin #'s, I switched to AT/AM mode, and almost always it would report back iron #'s only. If it didn't, I'd dig it and usually would find a coin or other non-iron target, but I suspect there probably was some small piece of iron co-located in the plug trying to mask the good target. It also seemed like it hit harder on coins, meaning the numbers were less jumpy.

It loved wheat pennies, I found four which all dated to the 1940's, which for a pounded park was a good accomplishment. I thought for sure silver would come, but silver was taunting me as I found several 1960's era coins, including a 1965 quarter and dime and several early 60's pennies :rant:
I did find a neat copper bangle bracelet marked Sabona London that I thought for sure was gold when I first recovered it and the sun shined on it , gleeming back at me, but upon further inspection it's a copper bracelet All said and done I recovered a little over $3 in change, the bracelet and a bucket of bottle caps.

It seemed like the F70 was faster at target processing, but I believe it was due to the DD having to analyze less soil. The biggest fault, as expected being a DD it LOVES bottle caps :ranting:

I think with a little more experience I might be able to mentally disc bottle caps out, but with the jumpy numbers on the F70/75 I'm concerned I might miss some good targets. Next trip there I'll run it in sizzle mode with max sensitivity and go for the deep coins lurking in the soil.

Does anyone find the F70/75 do act a bit funky on zinc?

hh,
Brian
 
I haven't really tried SL mode with the DD coil. I always assumed that SL was really for areas with little to no trash. I'll have to give it a shot next time out.

w
 
Cal_Cobra said:
The biggest fault, as expected being a DD it LOVES bottle caps :ranting:

...

Does anyone find the F70/75 do act a bit funky on zinc?

hh,
Brian
Click to expand...

I wiggle the coil back off my F75 and the numbers get lower and the audio gets raspy as the target leaves the tip. That never happens with a good target. Does that work with your F70?

My F75 is stable on zinc pennies, and when they're shallow, they ID perfectly and I don't even dig 'em!
 
THE COIL YOU ARE GETTING IS VERY FAST WHEN YOU HUNT IN TRASH YOU WILL SEE WHAT I MEAN. I HUNTED WITH CROSBY AND RYBO IN SAN FRAN THIS PAST WEEKEND AND THERE WERE A FEW PLACES WHERE THE F75 WAS ASHUT DOWN BY EMI BUT WHEN WE HIT A AREA A GOOD LOCATION THE F75 WAS DEADLY...CROSBY USED THE OTHER COIL AND I THINK HE HAD LESS OF A PROBLEM THEN I DID BUT YOU GOT TO LOVE THE 11"DD. I AM SPOILED BY IT..
 
go-rebels said:
Cal_Cobra said:
The biggest fault, as expected being a DD it LOVES bottle caps :ranting:

...

Does anyone find the F70/75 do act a bit funky on zinc?

hh,
Brian
Click to expand...

I wiggle the coil back off my F75 and the numbers get lower and the audio gets raspy as the target leaves the tip. That never happens with a good target. Does that work with your F70?

My F75 is stable on zinc pennies, and when they're shallow, they ID perfectly and I don't even dig 'em!
Click to expand...

I've seen this happen. I believe that the jumpy numbers are sometimes due to EMI or ground mineralization. Zincs act a bit funky (unless close to the surface, and not co-located with trash). On the surface they ID fine, but with any depth they tend to be jumpy, and if their corroded even more so (which is IMHO understandable). I have noticed that sometimes the TID #"s are the same for wheaties as zincs (I've seen this on other machines as well).

hh,
Brian
 
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