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Bulletins archief SRS
online Smithchart
circuitSolver
Digisonde Be
Weaver
Homewizard
Web SDR Maasbree
Q100 websdr
Tube data
mobiele operators dekkingkaart
S punten tabellen
In simpel formule: S IARU = (S Japan+9) : 2
of S Japan = (S IARU x 2) – 9