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I have some other questions:

1. Can Usenet (and perhaps also Unusenet) be used with amateur radio?

2. Can received AM/FM broadcasts be used as a input for SoX?

3. Is time synchronization possible with software defined radio?

4. Can it be used with a RF cable (such as to connect to a VCR)?

For 1.) Yes, with caveats. No encryption would be allowed. Typical data transfer rates are abysmal so it wouldn't be great for transferring files. And it might get interesting legally if you do transfer a file with music. I believe that would be broadcasting music which isn't allowed.

2.) Haven't tried this specifically, but I'd say almost certainly yes. Gnuraduo is all about creating audio processing pipelines.

3.) Yes, almost definitely, though there might be some technical aspects to it depending on what you're trying to accomplish.

4.) Yes, but that would likely require extra unnecessary steps.

The caveats you mention would probably be irrelevant with text newsgroups. However, what I am asking is if there are specific protocols for transferring Usenet articles with amateur radio, and how those protocols work.

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