SDR Transceivers: Is the Traditional “Superhet” Finally Obsolete?
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If you were to open the hood of a high-end ham radio from the 1990s, you’d find a complex maze of crystal filters, mixers, and intermediate frequency (IF) amplifiers. This is the Superheterodyne (Superhet) architecture—a design that has reigned supreme…
Beyond FT8: Exploring JS8Call for Keyboard-to-Keyboard Messaging
If you love the weak-signal performance of FT8 but hate that you can’t actually talk to anyone, you aren’t alone. While FT8 has revolutionized HF by allowing us to make contacts through the noise, it is strictly limited to structured exchanges: callsign,…