No antenna has a 400-mile range; the best you can hope for is around 80 miles, and that's usually from an outdoor setup. As for 4K and 8K, that assumes the stations ... of AM radio or anything ...

All you need is an antenna to tune into TV stations the old-fashioned way (in high-definition with digital signals, of course). If you want to keep up with local programming or just want some more ...

We’re talking about numbers stations ... pair of tape measures and a software defined radio (SDR), as [Tom Farnell] demonstrates. Tape measure antennas have a long and proud history in amateur ...