20 Jan '15, 6pm

Retrotechtacular: The Sylvania Tube Crusher

Retrotechtacular: The Sylvania Tube Crusher

This week, we’re switching off the ‘Tube and taking a field trip to Emporium, Pennsylvania, home of the Sylvania vacuum tube manufacturing plant . Now, a lot of companies will tell you that they test every single one of their products, ensuring that only the best product makes it into the hands of John Q. Public. We suspect that few of them actually do this, especially these days. After all, the more reliable the product, the longer it will be before they can sell you a new one. For Sylvania, one of the largest tube manufacturers of the golden age, this meant producing a lot of duds. A mountain of them, in fact, as you can see in the picture above. This article from the January 1957 issue of Popular Electronics vilifies forgers who used all kinds of methods to obtain defective tubes. They would then re-brand them and pass them off as new, which was damaging to Sylvania’s g...

Full article: http://hackaday.com/2015/01/20/retrotechtacular-the-sylva...

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Retrotechtacular: The Gossamer Condor

Retrotechtacular: The Gossamer Condor

hackaday.com 27 Jan '15, 6pm

For centuries, human-powered flight eluded mankind. Many thought it was just an impossible dream. But several great invent...

Vacuum Tube Repair After a Spectacular Failure

Vacuum Tube Repair After a Spectacular Failure

hackaday.com 17 Jan '15, 12pm

[Eric] has an Atwater Kent 55C AM radio from the early 1900’s. He’s been trying to restore the radio to proper working con...