Having said that, Lubbert advises that lesser coils have their uses, specifically in wooded parts, as it’s simpler to get amongst twigs, grass, and weeds with a far more compact head. Greater coils can theoretically detect objects which have been deeper underground, but they’re also more liable to electromagnetic interference https://www.rogachat.com/read-blog/5386_master-the-art-of-treasure-hunting-with-metal-detector-and-gold-detector.html