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What's your best trashy setup for F70 and 11''DD coil?
- Thread starter wayne_etc
- Start date
Hello,
You are discriminating out everything from 0 to 55 and notching in the lower half of the Nickel range (26-30). I only use this aggressive discrimination setting in HEAVY trash/iron infested areas. My normal setting for my F-70 and my F-75 are Process =DE Disc=6 Tone=1 Sens = 85 (up or dn depending on stability) Threshold (F-70) = -3 No Notch Setting the machines this way allows me to hear everything and I make the decision to dig or not to dig based on the sound, VDI, depth and the size of the target when pinpointing. I always dig what I call "Deep 50's". Using the F-75's on the fly depth meter if a target is anywhere in the 50 range and the depth meter indicates a deep target, I dig it and have been rewarded with some nice deep silver. Since the F-70 does not have an on the fly depth meter all you have to do is use the pinpoint feature to determine the target depth.
Comments are always welcome
Leo
You are discriminating out everything from 0 to 55 and notching in the lower half of the Nickel range (26-30). I only use this aggressive discrimination setting in HEAVY trash/iron infested areas. My normal setting for my F-70 and my F-75 are Process =DE Disc=6 Tone=1 Sens = 85 (up or dn depending on stability) Threshold (F-70) = -3 No Notch Setting the machines this way allows me to hear everything and I make the decision to dig or not to dig based on the sound, VDI, depth and the size of the target when pinpointing. I always dig what I call "Deep 50's". Using the F-75's on the fly depth meter if a target is anywhere in the 50 range and the depth meter indicates a deep target, I dig it and have been rewarded with some nice deep silver. Since the F-70 does not have an on the fly depth meter all you have to do is use the pinpoint feature to determine the target depth.
Comments are always welcome
Leo
On my F70 I set my disc @ 6, sens as high as it'll go being stable (at least somewhat), SL mode whenever possible, threshold in the negative, 3H tones (nickel's are high tones). If I get an iffy signal I switch to AM mode and re-check it, if it's a bouncer in disc mode, but stays negative in AM mode, it's always been junk in my experience. If I get a bouncer in AM mode, it might be something good next to iron. If it gets really trashy, there's two excellent small coils available too 
Hello,
I would stay with one tone and learn to identify a potentially good target by sound. 2F is my second choice because you can easily tell the difference between a deeper target and a shallow one by the sound. Just take your F-70 and put it in 2F tone and do a little air testing and listen to the difference between a coin waved close to the coil and one that is waved 4 inches or more and you will see what I mean. Once in a while I will use 4 tones but I soon find myself switching back to one tone because I find it less confusing. I rarely use SL mode on my F-70 because it makes the machine way to noisy. I hunt mostly in the city where there are all sorts of EMI sources so I stick with the DE process. Same is true with my F-75, I rarely use JE mode due to instability. Yea, I know, you can dial everything down on the both machines and still get good depth; however, I simply prefer to keep everything dialed up and stick with DE. I also have found no benefit at all by using the BC mode on the F-75. Yesterday, I detected an old rusty bottle cap with the F-75 in DE mode. The F-75 loves rusty bottle caps and ID's them with a good solid 70 reading with high confidence. I switched the process between BC and DE and swept the coil over and over again trying hear the difference; however, my tired old ears simply could not tell the difference. Sorry, I know I got off topic a little.
Leo
I would stay with one tone and learn to identify a potentially good target by sound. 2F is my second choice because you can easily tell the difference between a deeper target and a shallow one by the sound. Just take your F-70 and put it in 2F tone and do a little air testing and listen to the difference between a coin waved close to the coil and one that is waved 4 inches or more and you will see what I mean. Once in a while I will use 4 tones but I soon find myself switching back to one tone because I find it less confusing. I rarely use SL mode on my F-70 because it makes the machine way to noisy. I hunt mostly in the city where there are all sorts of EMI sources so I stick with the DE process. Same is true with my F-75, I rarely use JE mode due to instability. Yea, I know, you can dial everything down on the both machines and still get good depth; however, I simply prefer to keep everything dialed up and stick with DE. I also have found no benefit at all by using the BC mode on the F-75. Yesterday, I detected an old rusty bottle cap with the F-75 in DE mode. The F-75 loves rusty bottle caps and ID's them with a good solid 70 reading with high confidence. I switched the process between BC and DE and swept the coil over and over again trying hear the difference; however, my tired old ears simply could not tell the difference. Sorry, I know I got off topic a little.
Leo
Hi Leo,
I assume that you're using teh stock DD coil on the F75.
Did you drag the coil off the rusty bottle cap and review the VID #? My experience shows that both the audio degrades and VID gets jumpy when a bottle cap is sensed at the top or bottom tip of the coil in any F75 mode.
Let us know.
I assume that you're using teh stock DD coil on the F75.
Did you drag the coil off the rusty bottle cap and review the VID #? My experience shows that both the audio degrades and VID gets jumpy when a bottle cap is sensed at the top or bottom tip of the coil in any F75 mode.
Let us know.
Both the F-75 and the F-70 have the 11" DD coil. No, I did not drag the coil off the BC. However, you can bet I will try the technique the next time out and see what I come up with. The F-75 loves rusty bottle caps and I would like to find a way to keep from digging the stupid things. Thanks! It seems like I tried this technique sometime back, but I will certainly explore it further. Nevertheless, every detector has it quirks and I think if you own an F-75 you are going to dig some rusty bottle caps no matter what you do. Could this be the reason Fisher came up with BC mode for the F-75?
Leo
Leo