Hi all, I just played a bit and searched for VLF links in the web. Found this presentation by G3XBM: http://www.cdarc.org.uk/downloads/presentations/VLF_Through_Ground.pdf and the website of VO1NA: h
Hi Stefan, I like the first one (Roger's) but the other one needs more work! The TX is QRV on 8270.00709 +- many uHz with a carrier until the coil arcs again but only with about 0.2 A. Looking forwar