Collaborate Disseminate
There’s a Blue Bendix in Texas, and thanks to [Usagi Electric] it’s the oldest operating computer in North America. The Bendix G-15, a vacuum tube computer originally released in 1956, …read more Continue reading The Bendix G-15 Runs 75,000 Lines of Code
TVs used to be round, and the GE M935AWL is a great example of that. [bandersentv] found one of these ancient sets, but found it had a “cataract”—a large ugly …read more Continue reading Cataract Surgery For An Old TV
Back in the summer our eye was caught by [Jazzy Jane]’s new signal generator, or perhaps we should say her new-to-her signal generator. It’s an Advance E1 from around 1950, …read more Continue reading BNCs For An Old Instrument
Magic Eye tubes were popular as tuning guides on old-school radio gear. However, the tubes, the 6U5 model in particular, have become rare and remarkably hard to come by of …read more Continue reading A Digital Replacement For Your Magic Eye
[M Caldeira] had a project in mind: replacing a common vacuum tube with a solid-state equivalent. The tube in question was an EABC80 or 6AK8 triple diode triode. The key …read more Continue reading Making a Solid State 6AK8 Tube
In the 60’s and 70’s there were many ways to display numeric data. Nixie tubes, Vacuum Florescent Displays (VFD), micro projection systems, you name it. All of them had advantages …read more Continue reading Plight of The Lowly Numitron Tube
There’s still a mystique around vacuum tubes long after they were rendered obsolete by solid state devices, and many continue to experiment with them. They can be bought new, but …read more Continue reading A Tube Tester Laid Bare
When most people think of tube circuits, the first thing that comes to mind is often the use of high-voltage power supplies. It wasn’t a given for tube circuits, though, …read more Continue reading A Low Voltage Tube Makes For A Handy Preamplifier
You can easily get carried away when trying to test things. For example, if you want to know if your car is working, you could measure the timing of the …read more Continue reading Roll Your Own Simple Tube Tester
One of the more popular trends in the ham radio community right now is operating away from the shack. Parks on the Air (POTA) is an excellent way to take …read more Continue reading The Peak of Vacuum Tube Radio Design