I had the plans for a kit form soil resistivity meter, with operating instructions, that I gave away. Instead I built a 3db preamp. It's in a clear blue plastic box and looks lovely. I bought a new battery for it but haven't tested it yet. It's for capturing campfire ditties and 'ambient sounds'. On the 'Twin Peaks' archaeological project.

I've devised a method for TomBo to test this currick supposition. It needs a mountain bike, an accurate magnetic compass and a small notebook ...