Safe starting setup
Small targets need stability, not maximum power.
Sweep for small targets
Low, level, slow, and overlapped.
- 01Mark a permitted grid.
Walk straight, overlapping lanes.
- 02Control coil height.
Keep it low and level through the whole arc.
- 03Shorten the sweep.
Test a faint repeatable spot, then turn 90°.
- 04Search the second direction.
Iron masking changes with coil direction.
Choose the tradeoff
The “best” setting changes with the ground.
| Ground | Useful adjustment | What it costs |
|---|---|---|
| Mineralised soil | Ground balance; lower sensitivity until stable | Less raw depth, clearer real targets |
| Dense iron | Smaller coil or faster recovery | Better separation, usually less depth |
| Clean open soil | Standard coil and normal recovery | Slower recovery may add depth but merge targets |
| Stubble / uneven soil | Slow down; hold coil height steady | Fewer lanes per hour, fewer missed tiny targets |
| Heavy iron filtering | Reduce filtering carefully | More good targets and more convincing iron |
Change one control, search a small test patch again, and decide whether the signal—not the menu—improved.
Context-safe recovery
Stop when one find becomes a site.
- 1Pinpoint before opening.
Use only the smallest recovery method permitted on that ground.
- 2Keep coin and tools apart.
Do not rub, scrape, bend, or flatten a thin find.
- 3Photograph before cleaning.
Both faces, the edge, a millimetre scale, diameter, and weight all help.
- 4Stop at a cluster or container.
Do not enlarge the hole. Protect the location and contact the official reporting body.
- 5Use the country rule.
England, the Netherlands, and every other jurisdiction have different reporting and ownership routes.
Irregular flan, cross, pellets, or a partial royal legend?
Use the medieval hammered coin chartPortrait with Latin letters instead?
Try the Roman coin chart