Test your antenna with WSPR – the “whisper” mode
A few hundred milliwatts, a two-minute beacon and a world map of who heard you: WSPR is the cheapest antenna test there is.
M6OER · blog
Tag: propagation
A band-by-band guide to HF
From 160 m to 10 m: what each HF band is like, when it is open and what you can expect to work.
Band conditions explained: SFI, A-index and K-index
What the numbers on the band-conditions panel actually mean, and how to use them to decide which band to try tonight.