Recently I acquired a President Grant AM/SSB DX radio from the mid 80s. What was special about this radio was it´s immaculate condition. I have to admit I was struck with a little nostalgia but the radio is a keeper. The above picture is of the actual radio in my shack.
Understanding HF propagation
Jari Perkiömäki, OH6BG 12 July 2012 Sappee, Pälkäne, Finland
translated and revised English presentation: For full article see this link.
Geomagnetic Storms explained by Stan Gibilisco:
Dave Casler, KE0OG: Which is better: Vertical or Dipole?
FT8- WSJT-X for newbies by Joe Lalumia:
How an Antenna Trap Works by Stan Gibilisco: