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posted by Fnord666 on Monday July 08 2019, @03:11PM   Printer-friendly
from the does-it-take-10-minutes-to-warm-up? dept.

Antique radio receivers retain a significant charm, and though they do not carry huge value today they were often extremely high quality items that would have represented a significant investment for their original owners. This guy acquired just such a radio, a Philco 37-11 made in 1937, and since it was it[sic] a bit of a state he set about giving it some updated electronics. Stripping away the original electronics, he gave it a modern amplifier with Bluetooth capabilities, and a Raspberry Pi.

One of the coolest applications for a Pi I've seen.


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  • (Score: 2) by Knowledge Troll on Tuesday July 09 2019, @09:06PM (1 child)

    by Knowledge Troll (5948) on Tuesday July 09 2019, @09:06PM (#865152) Homepage Journal

    I take large samples of the baseband RF after it's been downsampled, examine it for spikes, and then remove them, while replacing the removed interval with a splined interpolation between the level just before the spike and the level just after the spike, using enough samples on both sides to set the spline curve up so the interpolation is somewhat sane.

    Damn that is very cool. I would love to try something like that as an audio soft clipper. it sounds like the performance would be really good for transients which are a frequent headache.

    Would you be interested in joining a chat system for a digital radio club? It's focused on getting fully qualified open source ham radio nerds together into one place in a way that's familiar for us. There's another guy there that does DSP professionally, a few competent programmers, and a couple power users / hobbiest programmers. It's a nice place to find people who have a clue to talk about topics exactly like your noise blanker. I know other people in there would go "that is really cool" and basically everyone in the club has big dreams of SDR. I can get you details outside of Soylent news if you like.

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  • (Score: 2) by fyngyrz on Tuesday July 09 2019, @10:39PM

    by fyngyrz (6567) on Tuesday July 09 2019, @10:39PM (#865193) Journal

    Thanks for your kind words.

    You can contact me by going to section 39 [ourtimelines.com] on that page. Edit your subject accordingly.

    Might be fun to lurk a bit in your group. 😊

    --
    I had the house child-proofed. But they must
    have done it wrong. Kids still get in somehow.