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Volumes

1. Vol 1 Modern Digital & the Raspberry Pi — Vol 1: The Terminal Unit Becomes a Program The rack of filters and the clattering teleprinter collapsed into a soundcard and a few lines of DSP. Here is how the whole terminal unit became software — and how a weak-signal mode called FT8 quietly took over the bands.
2. Vol 2 Modern Digital & the Raspberry Pi — Vol 2: The $35 Station and the Homebrew Loop A thirty-five-dollar computer the size of a playing card now does everything the wire room did — and you can still build the whole thing yourself. The end of the story that started with a hand on a brass key.