We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissable in your locale.


Mystery21 Jr. Member

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Date Registered:
May 08, 2021, 2308 UTC
Local Time:
January 28, 2023, 1903 UTC
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Item image   Communications Receivers - Principles & Design by Ulrich L. Rohde and TTN Bucher