Idag firas den brittiska radarns 90-årsdag och signalen GB9OCH aktiveras just nu på 7026 kHz CW.

QRZ:

”The 365ft mast at Great Baddow is the last wholly intact example from the Chain Home radar system that was developed by Sir Robert Watson-Watt and his team at Bawdsey Manor following the Daventry Experiment on 26-Feb-1935, and played such a vital role supporting the RAF in 1940”