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Recovery Delay
- Thread starter Rob (IL)
- Start date
Low-Boy/LCPM
Active member
Great thanks for all of your time and effort.
I have been running a recovery delay of 30 in a trashy school field. I pulled a 1923 merc from around 6" on edge with a large nail alongside it. For some reason the nail was hitting on the 22.5 and I was able to see 2 targets using the pinpoint bargraph, the dime was hitting on the 2.5. So many of my silver coins have been found with iron in the hole, faster recovery delay along with the 3 frequency pinpointing have made it possible.
earthmansurfer
Active member
Thx for the Video Rob. Fox also brought something to my attention. He said that I can use a faster recovery delay (say 80-100) in trashy areas compared to my normal 40 or so. I come from using faster machines and never thought about just going slow for coins (as I couldn't with a set recovery), even if iron or trash is nearby. Have you or any guys used faster recovery delay (meaning a slower recover) in trashy or iron areas. I'm more interested regarding iron as the deep (couple of inches across) iron really killed me today with falsing. I have to do some adjustments. I was getting falses and the faster recovery seemed to negate that (in hindsight I should have tried upping my filter from 5 to 10)
Larry (IL)
Well-known member
Many things seem backward here. A recovery delay of 40 is pretty fast and you might want to go to 25 or 30 for super fast. RD of 80 to100 is pretty slow and that is what I use for hunting deep targets in clean ground. For hunting slower in trash you would want to keep your filters at 5, I would think, and if trash is that bad I might suggest a smaller coil if you are using the stock coil.
To help cure falsing you will want to reduce the Gain and AC Discrimination until stable.
To help cure falsing you will want to reduce the Gain and AC Discrimination until stable.
The video is not mine, it is from You Tube.
I might be reading something wrong but you want a short delay (40 - 50) not a long delay (80 to 100) in trash. The number is for the delay, not the recovery. You want a small number of time units before the detector recovers when targets are close. ROB
I just read that post. He dropped it from 105 to 80 and (important) slowed his normal swing down. For a given coil if you slow your speed you need a longer delay. It's how much time the coil is over the target. For the same speed a 10" coil might use a RD of 95, but a 6x10 would need a RD of 55. There where also other changes that have to be considered.
I might be reading something wrong but you want a short delay (40 - 50) not a long delay (80 to 100) in trash. The number is for the delay, not the recovery. You want a small number of time units before the detector recovers when targets are close. ROB
I just read that post. He dropped it from 105 to 80 and (important) slowed his normal swing down. For a given coil if you slow your speed you need a longer delay. It's how much time the coil is over the target. For the same speed a 10" coil might use a RD of 95, but a 6x10 would need a RD of 55. There where also other changes that have to be considered.
earthmansurfer
Active member
Sorry for the mix up, I'm still not used to saying "recovery delay" instead of recovery speed. The scary thing is, I knew what I was talking about.
Larry - I use a recovery delay of 20 in my Deus program and it works very well. The deep iron doesn't bother it. I think the reason I had tons of falsing on the deep iron today was because I moved my filters to 5 high from 10 as it's the only thing I changed since last time. The area I hunt has almost zero trash, but it has lots of iron. I mean lots of deep iron. I never noticed it with my Omega as it was just out of it's range, but when I have the V3i at disc or 85 to 95 it generally comes in and today it was giving me good signals at times, but falsing constantly. This didn't happen with the recovery delay at 20 and slightly lower sens.
Rob - I'll have to try playing with the 100 range of recovery delay in iron to see if that works, with a slow swing speed of course.
Today was my first challenge, just have to try some new settings. The odd thing is, it's easier to know what to try at home than in the field. :veryangry:
Larry - I use a recovery delay of 20 in my Deus program and it works very well. The deep iron doesn't bother it. I think the reason I had tons of falsing on the deep iron today was because I moved my filters to 5 high from 10 as it's the only thing I changed since last time. The area I hunt has almost zero trash, but it has lots of iron. I mean lots of deep iron. I never noticed it with my Omega as it was just out of it's range, but when I have the V3i at disc or 85 to 95 it generally comes in and today it was giving me good signals at times, but falsing constantly. This didn't happen with the recovery delay at 20 and slightly lower sens.
Rob - I'll have to try playing with the 100 range of recovery delay in iron to see if that works, with a slow swing speed of course.
Today was my first challenge, just have to try some new settings. The odd thing is, it's easier to know what to try at home than in the field. :veryangry:
As the signal that is being processed decays, if another signal is picked up that is stronger the decaying signal the instrument should sound off on that target so it will be detected. However if the second signal is weaker than the decaying signal then this target will be ignored due to the long recovery delay. ROB
earthmansurfer
Active member
Rob (IL) said:
It seems that on both sides of the pond we have slower recovery (e.g. - Etrac) and faster recovery (e.g. - F75LTD) detectors. Now the V3i can be at either end of the spectrum, as well as anywhere in between. It also seems that one can find small and large coins at both ends of the recovery spectrum. It seems both approaches work but since the V3i is adjustable fully there, I wonder if under certain circumstances one might be better than the other... I think to a degree we are talking personal preference but there must be some science behind it as well.
Question - Is there really a better recovery speed, meaning a faster or in the middle or slower recovery speed, (all other things like Filters, mineralization, etc. considered) for smaller coins in (trash, iron, etc.) or larger coins in (trash, iron, etc.)?
Larry (IL)
Well-known member
My mistake, I meant to say Discrimination sensitivity.
earthmansurfer
Active member
earthmansurfer said:
I got out yesterday and did some cross checking. Out of 8 or so buttons I found, only two weren't picked up with slower recovery speeds (60). The Deus program I ran (had recovery delay at 20) and hit the smaller degraded button fine. Of the 3 small coins I found (1 hammered) the slower and faster recovery speeds worked (and it was in iron). The other settings didn't seem to matter as much regarding to the size of the target (really talking sensitivity).