vortex

Steven Gibbs has an MP3 on finding a vortex the easy way. This MP3 is zero cost and you can download it and listen to the inventor talk about how to locate a magnetic anomaly known as a vortex to use with an HDR device that he promotes. Well, we wish all the best to you. Personally, it is not so easy. There are many methods, but I like to use a cell sensor.