Sigmoid Social

Fredrik JanssonVacuum tube radio progress: got decent reception of several medium wave AM stations: BBC radio 5, Radio Caroline and a Dutch one. I learned to stay away from switching power supplies, all I tried were so noisy I couldn't hear anything else. With a linear supply the sound is pleasant, but could still be a bit louder. <a href="https://mastodon.online/tags/radio" class="mention hashtag" rel="nofollow noopener" target="_blank">#radio</a> <a href="https://mastodon.online/tags/diyelectronics" class="mention hashtag" rel="nofollow noopener" target="_blank">#diyelectronics</a> <a href="https://mastodon.online/tags/vacuumtube" class="mention hashtag" rel="nofollow noopener" target="_blank">#vacuumtube</a>

IT NewsSingle Tube SDR Is a Delightful Mix of Old and New - Software Defined Radio (SDR) is the big thing these days, and why not? A single co... - <a href="https://hackaday.com/2025/06/07/single-tube-sdr-is-a-delightful-mix-of-old-and-new/" rel="nofollow noopener" translate="no" target="_blank">https://hackaday.com/2025/06/07/single-tube-sdr-is-a-delightful-mix-of-old-and-new/</a> <a href="https://schleuss.online/tags/softwaredefineradio" class="mention hashtag" rel="nofollow noopener" target="_blank">#softwaredefineradio</a> <a href="https://schleuss.online/tags/radiohacks" class="mention hashtag" rel="nofollow noopener" target="_blank">#radiohacks</a> <a href="https://schleuss.online/tags/vacuumtube" class="mention hashtag" rel="nofollow noopener" target="_blank">#vacuumtube</a> <a href="https://schleuss.online/tags/tuberadio" class="mention hashtag" rel="nofollow noopener" target="_blank">#tuberadio</a> <a href="https://schleuss.online/tags/6j1" class="mention hashtag" rel="nofollow noopener" target="_blank">#6j1</a> <a href="https://schleuss.online/tags/sdr" class="mention hashtag" rel="nofollow noopener" target="_blank">#sdr</a>

µPWill the <a href="https://mastodon.social/tags/VacuumTube" class="mention hashtag" rel="nofollow noopener" target="_blank">#VacuumTube</a> <a href="https://mastodon.social/tags/MainFrame" class="mention hashtag" rel="nofollow noopener" target="_blank">#MainFrame</a> Computer Bendix G-15 from 1956 run <a href="https://mastodon.social/tags/Doom" class="mention hashtag" rel="nofollow noopener" target="_blank">#Doom</a> <a href="https://www.youtube.com/watch?v=no0CkQk7id0" rel="nofollow noopener" translate="no" target="_blank">https://www.youtube.com/watch?v=no0CkQk7id0</a><a href="https://mastodon.social/tags/RetroComputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#RetroComputing</a> <a href="https://mastodon.social/tags/GameHistory" class="mention hashtag" rel="nofollow noopener" target="_blank">#GameHistory</a> <a href="https://mastodon.social/tags/RetroGaming" class="mention hashtag" rel="nofollow noopener" target="_blank">#RetroGaming</a> <a href="https://mastodon.social/tags/Assembly" class="mention hashtag" rel="nofollow noopener" target="_blank">#Assembly</a>

Fredrik JanssonTime for some vacuum tube radio experiments!<a href="https://mastodon.online/tags/radio" class="mention hashtag" rel="nofollow noopener" target="_blank">#radio</a> <a href="https://mastodon.online/tags/vacuumTube" class="mention hashtag" rel="nofollow noopener" target="_blank">#vacuumTube</a> <a href="https://mastodon.online/tags/electronics" class="mention hashtag" rel="nofollow noopener" target="_blank">#electronics</a> <a href="https://mastodon.online/tags/diy" class="mention hashtag" rel="nofollow noopener" target="_blank">#diy</a>

tomsharpIn 1904, John Ambrose Fleming used an Edison-effect bulb as the first vacuum tube. <a href="https://mastodon.sdf.org/tags/Poetry" class="mention hashtag" rel="nofollow noopener" target="_blank">#Poetry</a> <a href="https://mastodon.sdf.org/tags/Science" class="mention hashtag" rel="nofollow noopener" target="_blank">#Science</a> <a href="https://mastodon.sdf.org/tags/History" class="mention hashtag" rel="nofollow noopener" target="_blank">#History</a> <a href="https://mastodon.sdf.org/tags/Electromagnetism" class="mention hashtag" rel="nofollow noopener" target="_blank">#Electromagnetism</a> <a href="https://mastodon.sdf.org/tags/VacuumTube" class="mention hashtag" rel="nofollow noopener" target="_blank">#VacuumTube</a> <a href="https://mastodon.sdf.org/tags/Fleming" class="mention hashtag" rel="nofollow noopener" target="_blank">#Fleming</a> (<a href="https://sharpgiving.com/thebookofscience/items/p1904h.html" rel="nofollow noopener" target="_blank">https://sharpgiving.com/thebookofscience/items/p1904h.html</a>)

IT News[Usagi Electric’s] Bendix G15 Gets DC Power - [Usagi Electric] is breathtakingly close to having his Bendix G15 vacuum tube comp... - <a href="https://hackaday.com/2024/07/08/usagi-electrics-bendix-g15-gets-dc-power/" rel="nofollow noopener" translate="no" target="_blank">https://hackaday.com/2024/07/08/usagi-electrics-bendix-g15-gets-dc-power/</a> <a href="https://schleuss.online/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#retrocomputing</a> <a href="https://schleuss.online/tags/usagielectric" class="mention hashtag" rel="nofollow noopener" target="_blank">#usagielectric</a> <a href="https://schleuss.online/tags/vacuumtube" class="mention hashtag" rel="nofollow noopener" target="_blank">#vacuumtube</a> <a href="https://schleuss.online/tags/bendixg15" class="mention hashtag" rel="nofollow noopener" target="_blank">#bendixg15</a> <a href="https://schleuss.online/tags/usagi" class="mention hashtag" rel="nofollow noopener" target="_blank">#usagi</a> <a href="https://schleuss.online/tags/g15" class="mention hashtag" rel="nofollow noopener" target="_blank">#g15</a>

IT NewsPlight of The Lowly Numitron Tube - In the 60’s and 70’s there were many ways to display numeric data. Nixie tubes, Va... - <a href="https://hackaday.com/2024/07/08/plight-of-the-lowly-numitron-tube/" rel="nofollow noopener" translate="no" target="_blank">https://hackaday.com/2024/07/08/plight-of-the-lowly-numitron-tube/</a> <a href="https://schleuss.online/tags/technologyconnections" class="mention hashtag" rel="nofollow noopener" target="_blank">#technologyconnections</a> <a href="https://schleuss.online/tags/clockhacks" class="mention hashtag" rel="nofollow noopener" target="_blank">#clockhacks</a> <a href="https://schleuss.online/tags/vacuumtube" class="mention hashtag" rel="nofollow noopener" target="_blank">#vacuumtube</a> <a href="https://schleuss.online/tags/hardware" class="mention hashtag" rel="nofollow noopener" target="_blank">#hardware</a> <a href="https://schleuss.online/tags/numitron" class="mention hashtag" rel="nofollow noopener" target="_blank">#numitron</a> <a href="https://schleuss.online/tags/tube" class="mention hashtag" rel="nofollow noopener" target="_blank">#tube</a>

Some Bits: Nelson's LinkblogValve.Computer: A modern(ish) computer built with vacuum tubes <a href="https://www.valve.computer/" rel="nofollow noopener" translate="no" target="_blank">https://www.valve.computer/</a> <a href="https://tech.lgbt/tags/via" class="mention hashtag" rel="nofollow noopener" target="_blank">#via</a>:hackernews <a href="https://tech.lgbt/tags/electronics" class="mention hashtag" rel="nofollow noopener" target="_blank">#electronics</a> <a href="https://tech.lgbt/tags/vacuumtube" class="mention hashtag" rel="nofollow noopener" target="_blank">#vacuumtube</a> <a href="https://tech.lgbt/tags/computer" class="mention hashtag" rel="nofollow noopener" target="_blank">#computer</a> <a href="https://tech.lgbt/tags/retro" class="mention hashtag" rel="nofollow noopener" target="_blank">#retro</a> <a href="https://tech.lgbt/tags/art" class="mention hashtag" rel="nofollow noopener" target="_blank">#art</a> #+

IT NewsA Tube Tester Laid Bare - There’s still a mystique around vacuum tubes long after they were rendered obsolet... - <a href="https://hackaday.com/2024/02/08/a-tube-tester-laid-bare/" rel="nofollow noopener" translate="no" target="_blank">https://hackaday.com/2024/02/08/a-tube-tester-laid-bare/</a> <a href="https://schleuss.online/tags/tubetester" class="mention hashtag" rel="nofollow noopener" target="_blank">#tubetester</a> <a href="https://schleuss.online/tags/vacuumtube" class="mention hashtag" rel="nofollow noopener" target="_blank">#vacuumtube</a> <a href="https://schleuss.online/tags/hardware" class="mention hashtag" rel="nofollow noopener" target="_blank">#hardware</a> <a href="https://schleuss.online/tags/tube" class="mention hashtag" rel="nofollow noopener" target="_blank">#tube</a>

Ethan BlantonBy way of <a href="https://social.sdf.org/tags/introduction" class="mention hashtag" rel="nofollow noopener" target="_blank">#introduction</a>, this is my <a href="https://social.sdf.org/tags/SDF" class="mention hashtag" rel="nofollow noopener" target="_blank">#SDF</a> alt account for <a href="https://mastodon.sdf.org/@elb" class="u-url mention" rel="nofollow noopener" target="_blank">@elb@mastodon.sdf.org</a>, where the timelines are getting wonky.Long time <a href="https://social.sdf.org/tags/Unix" class="mention hashtag" rel="nofollow noopener" target="_blank">#Unix</a> guy (mid-90s), <a href="https://social.sdf.org/tags/SystemsProgrammer" class="mention hashtag" rel="nofollow noopener" target="_blank">#SystemsProgrammer</a>, and lover of all things <a href="https://social.sdf.org/tags/retrocomputing" class="mention hashtag" rel="nofollow noopener" target="_blank">#retrocomputing</a>. I have a <a href="https://social.sdf.org/tags/PDP11" class="mention hashtag" rel="nofollow noopener" target="_blank">#PDP11</a> (or four), <a href="https://social.sdf.org/tags/CPM" class="mention hashtag" rel="nofollow noopener" target="_blank">#CPM</a> and <a href="https://social.sdf.org/tags/BASIC" class="mention hashtag" rel="nofollow noopener" target="_blank">#BASIC</a> microcomputers of various stripes, and I love <a href="https://social.sdf.org/tags/terminal" class="mention hashtag" rel="nofollow noopener" target="_blank">#terminal</a>:s.<a href="https://social.sdf.org/tags/HamRadio" class="mention hashtag" rel="nofollow noopener" target="_blank">#HamRadio</a> operator (KB8OJH) and <a href="https://social.sdf.org/tags/VintageRadio" class="mention hashtag" rel="nofollow noopener" target="_blank">#VintageRadio</a> enthusiast – Central Electronics, Drake, Electro-Voice, etc. <a href="https://social.sdf.org/tags/VacuumTube" class="mention hashtag" rel="nofollow noopener" target="_blank">#VacuumTube</a>/#Valve radios preferred!Professional <a href="https://social.sdf.org/tags/ComputerScience" class="mention hashtag" rel="nofollow noopener" target="_blank">#ComputerScience</a> <a href="https://social.sdf.org/tags/educator" class="mention hashtag" rel="nofollow noopener" target="_blank">#educator</a>.

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