Tag: amateur-radio

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• Welcome to the BI4OAE English Edition
  2026-10-17 · Getting Started

  The English edition of bi4oae.top — amateur radio knowledge, guides and tools by BI4OAE.

• How Amateur Radio Call Signs Are Built: Prefix, Type Letter, Zone Number, and Suffix
  2026-10-18 · Licensing & Regulations

  BI4OAE looks random at first glance, but every segment carries meaning. Here is the four-part structure of Chinese call signs, how it fits the ITU framework, and what you can and cannot read from a call sign.