TripleT Posted October 4, 2020 Share Posted October 4, 2020 I was river hunting yesterday and came across a solid +1 in 4.5 ft of water. After spending half an hour digging down approx 2ft. into the gravel bar, the signal broke into 2 centers. I finally gave up because of depth of water and size of hole. Anyone else have an idea as to what is down there... the site is about 1/2 mile down stream from a bridge, and the river has been close to flood level all summer. Link to comment Share on other sites More sharing options...
GB_Amateur Posted October 4, 2020 Share Posted October 4, 2020 What frequency were you operating? What search mode? Sensitivity/Gain? Iron Bias? Recovery Speed? Link to comment Share on other sites More sharing options...
TripleT Posted October 4, 2020 Author Share Posted October 4, 2020 Sensitivity 20 Fe 0 Speed 3, it's a 600 Beach 1 Threshold 1 GB 2 on autotracking 1 Link to comment Share on other sites More sharing options...
Steve Herschbach Posted October 4, 2020 Share Posted October 4, 2020 A target id of 1 normally indicates a very small low conductor, like a bit of aluminum foil, or a tiny gold nugget. Such targets are normally detected at a few inches tops. At two feet depth it’s highly likely this is some kind of false signal. 3 Link to comment Share on other sites More sharing options...
PimentoUK Posted October 4, 2020 Share Posted October 4, 2020 Coke ( part-burnt coal ) will give a '1' in multifreq, but only a weak response, so shallow detection only. Stainless steel is also a potential '1' target, but it would still need to be small. So cutlery items would not read that low, and ring-shaped items like finger-rings, washers and nuts would also tend to read higher. I suggest re-scanning in a single-freq mode, to see if it responds differently. Link to comment Share on other sites More sharing options...
TripleT Posted October 4, 2020 Author Share Posted October 4, 2020 Thanks Steve, I've never had a signal like that before, I guess curiosity got the better of me... I was hoping a gold bar, or two! 50 minutes ago, Steve Herschbach said: A target id of 1 normally indicates a very small low conductor, like a bit of aluminum foil, or a tiny gold nugget. Such targets are normally detected at a few inches tops. At two feet depth it’s some kind of false signal. Link to comment Share on other sites More sharing options...
TripleT Posted October 4, 2020 Author Share Posted October 4, 2020 Also thanks for the coke thing, Pimento... This is something I've only run into twice before. Though, usually on dry land. Link to comment Share on other sites More sharing options...
GB_Amateur Posted October 4, 2020 Share Posted October 4, 2020 Ground can play tricks, particularly wet ground. If there is salt present, that adds doubly to the issue. But I would think Beach mode is made to deal with this (I never use Beach myself so can't speak from experience). You didn't mention a single frequency so I assume you are in Simultaneous Multifrequency which also should be less susceptible to ground falsing. Finally, although the Equinox is somewhat immune to digital TID averaging (adding a high conductor signal and a low conductor signal and displaying something in between), that can happen. The fact that you got down 2 ft(!) and still weren't seeing a different TID pretty much eliminates that possibility, IMO. Link to comment Share on other sites More sharing options...
TripleT Posted October 4, 2020 Author Share Posted October 4, 2020 When switching thru single frequencies tdi stayed in the 1-2 range... Link to comment Share on other sites More sharing options...
PimentoUK Posted October 4, 2020 Share Posted October 4, 2020 Wire can also give low ID values. Target corner frequency for long thin things like wire, is almost entirely determined by the diameter. Making the sample longer just increases the target response strength ( in proportion to the length ), the corner-freq and ID remain unchanged. So one realistic target that could be ID=1 but detectable at depth is a reel of wire. For example stainless steel wire for fencing. Provided there's no contact, creating a closed loop. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now