Shaun Merrigan
Classic Electronic Restoration, Vacuum Tube Audio, Technical History, Photography
Day: August 14, 2026
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An aeronautical Non‑Directional Beacon (NDB) is a ground‑based radio transmitter that sends out a continuous signal in all directions, allowing aircraft equipped with Automatic Direction Finders (ADF) to determine their bearing relative to the station. It’s one of the oldest forms of radio navigation—simple, rugged, and still used worldwide despite the rise of GPS and…
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These data comprise my FT8 receive only logs from about 2022 until now. These logs were collected using my local KiwiSDR and an LZ1AQ loop antenna. The statistics were generated using Microsoft SSMS and SQL using my data extracted from SWLog. (Thanks Robert Sillett). Effort was put into sanitizing, de-duping, and ensuring that only one…