Prywatna Wytwórnia Lamp is Aleksander Zawada's one-man vacuum tube factory, now housed in Warsaw's Institute of Vacuum Technology (Zawada's original vacuum tube factory was in his apartment). Sébastien Bourdeauducq met Zawada and did a great writeup on his handcrafted valves -- and no, it's nothing like Portlandia's artisinal lightbulbs.
He starts the triode by assembling the grid. To do this, he takes a piece of nickel wire, and soldered a small spiral of molybdenum wire on it – one turn and one solder at a time. He uses molybdenum because of its low emission of free electrons when heated (which causes unwanted grid current in tubes) and its high melting point. Soldering is done with a spot welding machine, which passes high current through the parts to be soldered (nickel and molybdenum wires). The current is so high that the metals heat and melt locally and form a small solder spot. How does one obtain such a high current? Aleksander simply took the transformer of a microwave oven, removed the high voltage secondary, and wound instead a few turns of a thick aluminum bar whose ends are connected to the copper electrodes of the welding machine. The solder current can be controlled by a triac-based dimmer connected in series with the transformer’s primary...
As a cheap source of bulbs, Aleksander uses glass enclosures he easily obtained from light bulb factories – they had plenty of surplus stock when incandescent lights were removed from sales in Europe.
Now, let’s assemble the electrodes and the bulb together. He does that by melting the bulb into the base, by rotating it and heating the bottom with a propane torch. Of course, the spinner is also made of junk materials – this time, a turntable that was originally intended to play vinyls.
Kirby Ferguson, who created the remarkable Everything is a Remix series, has a new podcast hosted by the Recreate Coalition called Copy This and he hosted me on the debut episode (MP3) where we talked about copying, creativity, artists, and the future of the internet (as you might expect!).
The Electronic Frontier Foundation has launched a new series, 12 Days of 2FA, in which every installment explains how to turn on two-factor authentication for a range of online services and platforms.
The Data & Society institute (dedicated to critical, interdisciplinary perspectives on big data) held an online seminar devoted to Cathy O’Neil’s groundbreaking book Weapons of Math Destruction, which showed how badly designed algorithmic decision-making systems can create, magnify and entrench the social problems they’re supposed to solve, perpetuating inequality, destabilizing the economy, and making a […]
The Boing Boing Store’s Gift Guide is full of ideas for pretty much anyone in your life like hipster ice cub trays, Xbox controllers, Halo Boards, and even diamond necklaces. As always, all products in the Boing Boing Store come at great discounts, too. Shop by price bucket starting at under $20. Under $20:Bloxx Jumbo Ice Trays […]
Unlike traditional lighters, the SaberLight features an electronic plasma beam that’s both rechargeable and butane-free. This sleek lighter is even approved by TSA, so you’ll never be stuck buying lighters you’ll just have to throw away partially used. For some people, like me, this is a pretty big game-changer. The SaberLight’s beam is actually both hotter and cleaner […]
Holiday shopping is in full swing, and the Striiv Touch is one of the best gift ideas I’ve landed on. Its simple design works for females and males, and its wide range of features makes it suitable for even the non-fitness enthusiasts in your life.Unlike traditional fitness trackers, the Striiv Touch also acts as a smartwatch. It […]