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 most of us still come ...

Editor’s Note: Ever wonder how much those old transistor radios, valves, multimeters, or telephones you’ve been hanging onto all these years might be worth now? Well, wonder no longer: Steve Johnson ...

Some of the most popular and sought-after models of tube testers today for antique radio and vintage audio service are military surplus. Popular models of military tube testers for use today were ...