#vacuum-tubes — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #vacuum-tubes, aggregated by home.social.
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From Compactrons to Nuvistors: Vacuum Tubes’ Last Hurrah
https://swling.com/blog/2026/05/from-compactrons-to-nuvistors-vacuum-tubes-last-hurrah/
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Ah, yes, an article that promises to unravel the mysteries of ancient tech, yet delivers the digital equivalent of a closed door: "Enable #JavaScript and #cookies to continue." 😂 Because, of course, when learning about vacuum tubes, one's first task is to master cookie settings. 🍪🔌
https://www.construction-physics.com/p/the-surprisingly-long-life-of-the #ancienttech #digitalhumor #vacuumtubes #techmysteries #HackerNews #ngated -
I started wiring the AC side of this preamp and realized I was out of black wire which is of course what you used to designate the hot leg in America.
#PMillettBuild #Audio #MicPreamp #VacuumTubes #TubePreBuild #ACWiring #220or221
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Almost all of the audio wiring is done in this now. Finished it today. What's left is the AC wiring, which I really can't do until I get the front panel. Reason being one of the items mounted to the front panel attaches from the outside.
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I did a little more wiring on this tube mic preamp. It's almost completely wired. The panel you see is only a stand-in to make sure all of the switches and knobbies would fit without issue. The panel is the right size with the right holes that a friend with a waterjet at his metalshop cut for me for testing purposes. The real front panel will be thicker (either 3mm or 1/8th inch) and decorated with color and lettering and such.
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The Nizhny Novgorod Radio Laboratory (NNRL).
Imagine it is June 1918. The young Soviet Republic, surrounded by enemies on all sides and struggling to find food for its cities, establishes a radio laboratory at the Tver radio station. The development of technology was necessary from both an economic and a political point of view.
But a small workshop with outdated equipment did not allow them to work at the required level. Therefore, it was decided to move the laboratory to Nizhny Novgorod.
The scientists at the radio laboratory worked on establishing vacuum tube production and developing radiotelephony.
Today, a museum dedicated to the history of the NNRL operates here. The museum’s exhibition contains many original devices and samples of radio equipment.
For me, this museum is a place where I feel inspired by human genius. I look at these tube assemblies, at the microchips, and remember the saying: “If aviation had developed at the same pace, today an airplane would be the size of a matchbox and could fly around the globe in one hour.”
#radiolab #NizhnyNovgorod #retrocomputing #microelectronics #radioelectronics #vacuumtubes -
I can't decide is on v2 of my Millett tube preamp I should use ON and OFF at the power switch or 1 and 0.
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Mr. Carlson acquired an instrument tuner. It doesn't just use vacuum tubes, it uses vacuum tubes, a custom pulsing neon tube, _multiple_ very custom transformers, a giant hidden reference tuning fork, a motor, and a 12-speed transmission gearbox, and it came to him fully working and _recently in service_.
Basically if you're into holy shit old electrics, you will probably enjoy this:
https://www.youtube.com/watch?v=Stxd_YMHF3U
(for reference, you can get phone apps for this, or you can buy little dedicated standalone devices the size of... idk, a thick credit card, or also the kind that's smaller and has a clip pickup that attaches to your instrument head. BUT NOT IN 1930)
#electronics #vintage #VacuumTube #VacuumTubes #MrCarlson #tuner #InstrumentTuner
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Build A High Voltage Supply For Vacuum Tube Work https://hackaday.com/2025/11/25/build-a-high-voltage-supply-for-vacuum-tube-work/ #powersupply #vacuumtubes #MiscHacks #valves #tubes
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5V4/5U4 has a glow as well when powered up.
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This board helps you prototype circuits with tubes https://hackaday.com/2025/09/14/this-board-helps-you-prototype-circuits-with-tubes/ #breadboardhacks #vacuumtubes #RadioHacks #how-to
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This board helps you prototype circuits with tubes - There you are at the surplus store, staring into the bin of faded orange, yellow, ... - https://hackaday.com/2025/09/14/this-board-helps-you-prototype-circuits-with-tubes/ #breadboardhacks #vacuumtubes #radiohacks #how-to
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Forgot to post this...
In honor of Labor Day, i have my pro-union sign on my office door.
The 217 is an homage to The University of Illinois Urbana-Champaign's Electrical and Computer Engineering program (217 is the area code).
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Fascinating.
Modern vacuum tube production in Rossville Georgia, USA by the re-established Western Electric.
Video shows the process of making the Western Electric 300B high-end audio vacuum tube.
Incredible stuff, far more hand-work intensive than I had anticipated.
https://www.westernelectric.com/
Video: https://www.youtube.com/watch?v=PA8G5zRjriI&t=326s
#vintagetech #vintagehifi #vintage #hifi #vacuumtubes #audio
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Weekly output: Zipline drones, fixed wireless broadband, AI transformations, Dashlane, AI fairness, FCC resignations, AI resiliency, National Capital Radio & Television MuseumM
My third week in a row of business travel had me in Santa Clara, Calif., from Tuesday through Friday–at a venue I’d last set foot in at the Demo conference in 2013.
6/3/2025: Inside Zipline’s high-tech drone factory where delivery innovation takes flight, Fast Company
My decision to book an early-afternon flight from SFO to National at the end of my Google I/O trip last month paid off when I used that time to visit the drone-delivery startup Zipline’s factory in South San Francisco. I followed up that visit by quizzing an executive from the firm a week later.
6/3/2025: Fiber Is Fast, But 5G Home Internet Is More Appealing for One Reason, PCMag
I didn’t want to write up this J.D. Power customer-satisfaction survey without getting some answers about the weirdly-high scores for old, slow digital-subscriber-line services.
6/4/2025: Transforming Industries with AI & Big Data—Success Stories from the Frontlines, TechEx North America
The first of three panels I did at this conference at the Santa Clara Convention Center (with the organizers covering my lodging and reimbursing my airfare) reunited me with a fellow panelist from 2021: Lufthansa Industry Solutions’ Stanislaw Schmal, who was on a panel I did at my first post-pandemic conference trip in September of 2021. It was a treat to have Stan on stage again, and he and my other panelists–Oracle’s Shasank Chavan, Ford Credit’s Manav Khatri, Airbnb’s Dror Engel, and Deepgram’s Kris Efland–made my panel-moderation work easy.
6/5/2025: This Password Manager Now Lets You Create an Account Without a Password, PCMag
Dashlane gave me an embargoed copy of their announcement of their new option to let people create accounts secured only by USB security keys, but that left me a little fuzzy about how exactly this would differ from that password-manager service’s existing support for passwordless authentication–and my editor was fine with holding the post until I could get those details cleared up.
6/5/2025: AI Fairness and Bias Mitigation—Advanced Approaches, TechEx North America
My second panel had me quizzing JPMorgan Chase’s Naresh Dulam, Aon’s Aras “Russ” Memisyazici, and PwC’s Ilana Golbin Blumenfeld about how to avoid having AI systems amplify human biases.
6/5/2025: Who’s Running the FCC? Surprise Resignation Reduces the Agency to a Duo, PCMag
I’ve been writing about the Federal Communications Commission for well over two decades, probably closer to three, and I can’t remember a commissioner announcing a resignation on a Wednesday effective on Friday of the same week. Also unprecedented: having this five-member commission reduced to two people.
6/5/2025: Building Resilient AI Infrastructure, TechEx North America
My last panel at TechEx was a late addition when another moderator dropped out; when an event paying your travel asks for you to pitch in, it’s a good idea to be a team player. My teammates on this panel: Ford Motor Company’s Robert Gray, Oracle’s Iman Zadeh, Red Hat’s Mark Kurtz and InfoVia’s Mike Magalsky.
6/6/2025: Spotify Takes Flight on United Airlines: Here’s What You Get, PCMag
When I got to try this on my flight from San Jose to Houston Friday, I realized that United’s implementation of Spotify did not include the ability to listen to the airline’s longtime theme song, “Rhapsody in Blue”–which made the lede I’d written incorrect. Instead of just rewriting that, I opted to take notes on the experience over that three-plus hour flight and rewrite the entire post.
6/7/2025: This Little Museum Outside DC Offers a Deep Dive Into Retro Radio and TV Tech, PCMag
My friend and longtime CES fellow traveler Gary Arlen suggested that I visit the National Capital Radio & Television Museum in Bowie, Md., where he’s a docent, and I took him up on that advice in February. Then I didn’t write the post until March, after which my client needed a little longer to get the story edited and published.
#AI #artificialIntelligence #conference #Dashlane #droneDelivery #DSL #FCC #FIDO2 #fixedWireless #JDPower #NationalCapitalRadioTelevisionMuseum #passwordManager #SantaClara #Spotify #techHistory #TechExNorthAmerica #UA #UnitedAirlines #vacuumTubes #vintage #Zipline
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In today's thrilling episode of "Ancient Tech for the Uninitiated," we've got 4.22 gigs of dusty old books on vacuum tubes that nobody renewed copyrights for before 1964! 📚🤓 A big thank you to the unsung heroes who scanned these relics, because apparently, even the guy running this site is too busy with his "day job" to do it himself. 😂🔌
http://www.tubebooks.org/technical_books_online.htm #AncientTech #DustyBooks #VacuumTubes #CopyrightFree #ScanningHeroes #HackerNews #ngated -
Tube radio progress: there's some light and a tiny sound when feeding it an AM test signal.
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@tomsharp
Is that diagram meant to be a diode (in which case the heater should be behind the cathode) or a triode (in which case the grid should be between the combined heater/cathode and the anode)?
If, as it would appear, it is meant to represent some kind of weird-arse double diode then what do the colours indicate?
#electronics #valves #VacuumTubes #JustSaying :-) -
Grid Leak Radio Draws the Waves - [Stephen McNamera] found a schematic for a grid leak radio online and decided to t... - https://hackaday.com/2024/05/23/grid-leak-radio-draws-the-waves/ #classichacks #vacuumtubes #radiohacks #radio
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1940's signal generator
Recently, I was repairing an old circa 1940's signal generator.
The point-to-point wiring on this is like a work of art! -
I accidentally left a box of NOS vacuum tubes on the porch outside when I was moving out of the office yesterday. It dipped below freezing last night, so now they'll sound better because they've been cryo-treated.
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When I finally own my own castle, I will have a room with walls full of old vacuum valves, just like glasslinger.
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Join @ishotjr and special guests including @sophywong, @rehana_makes, @North, and more as we talk #cosplay, #costumes, creating your own #oc, #VacuumTubes, and more, 🚨🚨🚨 !!!TODAY!!! 🚨🚨🚨 August 31st at our V86 #LaunchParty! 🥳
https://events.zoom.us/e/view/dz-b-IFVQBKzWW9N79Ly4g -
Join @ishotjr and special guests including @sophywong, @rehana_makes, @North, and more as we talk #cosplay, #costumes, creating your own #oc, #VacuumTubes, and more, TOMORROW, August 31st at our V86 #LaunchParty! 🥳
https://makezine.com/article/maker-news/join-our-virtual-launch-party-and-chill-with-the-authors/ -
Join @ishotjr and a panel of special guests as we talk #cosplay, #costumes, creating your own #oc, #VacuumTubes, and more, next Thursday, August 31st at our V86 #LaunchParty! 🥳
https://makezine.com/article/maker-news/join-our-virtual-launch-party-and-chill-with-the-authors/ -
⚛️ This is a neat series on building all the tools for creating vacuum tubes from scratch. @North is worth a follow!
https://www.youtube.com/watch?v=8aVg-62euBg
#VacuumTubes #Video #SignalDitch #DIY #Workshop #Lathe #GlassBlowing #Tech 📹
