Radials and Counterpoises

This is a talk I gave to Norfolk Amateur Radio Club at its annual Radioactive event. It looks at radials for ground-mounted verticals, including how many do you need and how long should they be. It references the excellent work done by Rudy Severns N6LF. Download the presentations in PDF format (760k). 

HF Propagation - what do the numbers mean?

This was the title of a talk and presentation I gave to the Nuneaton ARC in March 2025.

I have attached a PDF of the PowerPoint presentation, which can be downloaded here.

Without the talk, it may not make total sense, but it at least gives you a flavour of the talk and some insight into what some of the terms mean in HF propagation.