Talking about vacuum tubes in 2025 might seem like talking about the role of buggy whips in today’s transportation world; but that’s not the case. There’s no denying that these devices—called vacuum ...
Raytheon is best known as a major defense contractor, but the company’s roots go far deeper, starting as a major manufacturer of vacuum tubes in the early days of radio. Today, the company is mostly ...
Penta Laboratories, a manufacturer in Newbury Park, Calif., makes vacuum tubes for radio transmitters and other purposes.
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