Project E.L.F. - The history of communicating with submarines underwater - #HamRadioQA
18:10
Why America's Forgotten Microwave Skyway Network is still standing | Abandoned
29:27
Why don't Submarines use Radio or GPS?
19:28
Submarine Secrets: Pump Jets And Propellers Explained
10:42
Ham Radio - Ground spike antenna. Using the earth to receive LF and VLF
21:44
Window screen antenna ground network- I can't believe what this does! #hamradioqa
23:22
¡Mejor que la Rybakov! Construí una antena en forma de L invertida de 53 pies
18:48
Natural Radio From Lightning Sounds INCREDIBLE- VLF Radio
30:52