- Linux Packet Radio
- Voice on the SignaLink USB with Linux
- Includes a section on automatic CQ calling for contests, which is for a SignaLink USB, but could be easily adapted for other devices
(Hams appear to call these “reflectors”)
- linux-hams, the primary general mailing list for Linux ham discussion. Readers are generally fairly knowledgeable about Linux technically. Also has discussion about AX.25 development.
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Amateur radio is a radio service in which people are allowed and encouraged to build their own radios, antennas, and so forth. It can be used to communicate all around the globe without any intervening infrastructure such as satellites or cables.