Western Electric 212D General-Purpose Power Triode Test - Giant Vacuum Tube From the 1920s

Welcome to the Wild West of Electronics! Today, we will test and discuss a gorgeous old Western Electric 212D general-purpose indirectly-heated power triode vacuum tube. This was an estate sale find that came at an opportune time for me to finally get my rocks off playing with one of these old monsters, as well as getting the chance to show others how they might go about testing and using these old tubes in new audio equipment. As best I can tell, these were supposedly made prior to 1928 and were mainly used by AT&T in early telephone repeaters designed to transmit signals over very long distances. They're great for extreme audio experimetation because they are the most pure and ideal versions of triodes that were ever made.... remember that this was a time when Engineers were just starting to scratch the surface of the emerging communication tech that was about to happen, so there were very few specialized tubes that were optimized for more focused application. If you have more info on this, please comment....I would love to know more about it. If you're interested in procuring this tube, hit me up at [email protected]. Thanks for watching, and please hit the subscribe button for more totally unpredictable content!