Welcome to the BI4OAE English Edition
This is the English edition of bi4oae.top, operated by BI4OAE — a Class C amateur radio licensee based in Shandong, China (ITU zone 4).
What you’ll find here
- Practical shortwave and HF guides
- Band plans and propagation-window references
- Digital mode (FT8, JS8, etc.) how-tos
- Rig comparisons and antenna notes
The original Chinese articles are archived under /zh/. New English content is
being added continuously. Most reference pages are designed to be bookmarked and
revisited — band-plan cheat sheets, propagation calculators, and rig comparison
tables.
Tip: use the language switch in the top-right corner to jump between the English and Chinese editions.